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WVDOT - Countermeasure Logic

Written by Lauren Miller

The following Countermeasures are available as filters in Numetric, and will appear as recommended countermeasures in Safety Analysis and are available as filters within each Numetric application. Each Countermeasure, its associated treatments, and the logic used to identify crashes associated with that countermeasure are documented below.

Access Management

Treatments

Countermeasure Logic

Treatments

The following treatments are associated with the Access Management Countermeasure:

  • Install left-in left-out (LILO) treatment (CMF ID: 11066)

  • Install median on the minor approach of an unsignalized 3-leg intersection (CMF ID: 2999)

  • Install right-in-right-out (RIRO) operations at stop-controlled intersections (CMF ID: 9821)

  • Presence of driveway on an intersection approach corner (CMF ID: 9738)

  • Presence of driveway on an intersection receiving corner (CMF ID: 9740)

  • Presence of median (CMF ID: 3095)

  • Add markings to the major approach of unsignalized 3-leg intersection to serve as a median (CMF ID: 3004)

  • Add Two-Way-Left-Turn-Lane (TWLTL) to the major approach of an unsignalized 3-leg intersection (CMF ID: 3005)

  • Add Two-Way-Left-Turn-Lane (TWLTL) to the major approach of an unsignalized 4-leg intersection (CMF ID: 3017)

  • Convert an open median to a mixed median on the major approach to a 3-leg unsignalized intersection (CMF ID: 3002)

  • Increase intersection median width by 3 ft increments (CMF ID: 298)

  • Increase intersection median width by 3 ft increments (CMF ID: 299)

  • Increase intersection median width by 3 ft increments (CMF ID: 300)

  • Increase intersection median width by 3 ft increments (CMF ID: 301)


​

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Access Management Countermeasure:

IF

CF - Intersection/Junction Related - Intersection = True

AND

Median Type Code is not blank

Bicyclist

Treatments

Countermeasure Logic
​
​

Treatments

The following treatments are associated with the Bicyclist Countermeasure:

  • Raised bicycle crossings (CMF ID: 419)

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Bicyclist Countermeasure:

IFCF - Intersection/Junction Related - Intersection = True

ANDCF - Involving Non-Motorist - Bicyclist = True

Highway Lighting

Treatments

Countermeasure Logic

Treatments

The following treatments are associated with the Highway Lighting Improvements Countermeasure:

  • Full lineal to no or partial lineal lighting (CMF ID: 2364)

  • Improve lighting (CMF ID: 8479)

  • increase intersection illuminance from low (< 0.2 fc) to medium (≥ 0.2 fc and <1.1 fc) (CMF ID: 8320)

  • Install intersection lighting (CMF ID: 4462)

  • Install single luminaire at intersection (CMF ID: 9029)

  • Partial plus to partial interchange lighting (CMF ID: 2370)

  • Provide intersection illumination (CMF ID: 433)

  • Provide intersection illumination (CMF ID: 437)

  • Provide intersection illumination (CMF ID: 438)

  • Provide intersection illumination (CMF ID: 439)


​

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Highway Lighting Improvements Countermeasure:

IF

CF - Intersection/Junction Related - Intersection = True

AND

C15 - Lighting Condition = Dark - Not Lighted

Pedestrians

Treatments

The following treatments are associated with the Pedestrians (Intersection Improvements) Countermeasure:

  • Install a pedestrian hybrid beacon (PHB or HAWK) (CMF ID: 10586)

  • Install crosswalk on one minor approach (CMF ID: 3019)

  • Install Pedestrian Signals (CMF ID: 8481)

  • Install Pedestrian Signals (CMF ID: 8482)

  • Install rectangular rapid flashing beacon (RRFB) (CMF ID: 11168)

  • Install Red-light indicator lights (CMF ID: 8819)

  • Raised intersections (CMF ID: 414)

  • Raised intersections (CMF ID: 415)
    ​

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Pedestrians (Intersection Improvements) Countermeasure:

IF

CF - Intersection/Junction Related - Intersection = True

AND

CF - Involving Non-Motorist - Pedestrian = True

Railroad Grade Crossings

Treatments

Countermeasure Logic

Treatments

The following treatments are associated with the Railroad Grade Crossings Countermeasure:

  • Install audible devices (CMF ID: 11047)

  • Install audible devices (CMF ID: 11048)

  • Install audible devices (CMF ID: 11049)

  • Install automatic gates at crossings that previously had flashing lights and sound signals (CMF ID: 494)

  • Install flashing lights and sound signals (CMF ID: 482)

  • Install standard flashing lights (CMF ID: 11055)

  • Install standard flashing lights (CMF ID: 11056)

  • Install standard flashing lights (CMF ID: 11057)

  • Install stop sign at highway-rail crossing (CMF ID: 11042)


​

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Railroad Grade Crossings Countermeasure:

IF

CF - Intersection/Junction Related - Intersection = True

AND

C - RXR Related (within 100 Ft) = Yes

Shoulder Treatments

Treatments

Countermeasure Logic

Treatments

The following treatments are associated with the Shoulder Treatments Countermeasure:

  • Change left shoulder width from X to Y (feet) (CMF ID: 2974)

  • Change right shoulder width from X to Y (CMF ID: 3012)


​

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Shoulder Treatments Countermeasure:

IF

CF - Intersection/Junction Related - Intersection = True

AND

CF - Event - Lane Departure - Roadway Departure Right = True

Advanced Technology and ITS

Treatments

Countermeasure Logic

Treatments

The following treatments are associated with the Advanced Technology and ITS Countermeasure:

  • Install Box Span Signal (CMF ID: 8724)

  • Install restricted crossing U-turn intersections (CMF ID: 10678)


​

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Advanced Technology and ITS Countermeasure:

IF

Intersection Related = True

AND

Approach Count = (Any of the following) 3, 4

AND

Intersection Traffic Control = Signalized

Delineation -Intersection Shaped Pavement Markings

Treatments

Countermeasure Logic

Treatments

The following treatments are associated with the Delineation -Intersection Shaped Pavement Markings Countermeasure:

  • Install supplemental intersection shaped pavement markings (CMF ID: 9055)

  • Install supplemental intersection shaped pavement markings (CMF ID: 9056)
    ​

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Delineation -Intersection Shaped Pavement Markings Countermeasure:

IF

Intersection Related = True

AND

Approach Count = (Any of the following) 3, 4

AND

Intersection Traffic Control = Uncontrolled

Delineation -Stop Ahead Pavement Markings

Treatments

Countermeasure Logic

Treatments

The following treatments are associated with the Delineation -Stop Ahead Pavement Markings Countermeasure:

  • Install supplemental intersection shaped pavement markings (CMF ID: 9055)

  • Install supplemental intersection shaped pavement markings (CMF ID: 9056)

  • Provide "Stop Ahead" pavement markings (CMF ID: 397)

  • Provide "Stop Ahead" pavement markings (CMF ID: 9075)

  • Provide "Stop Ahead" pavement markings (CMF ID: 9078)


​

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Delineation -Stop Ahead Pavement Markings Countermeasure:

IF

Intersection Related = True

AND

Approach Count = (Any of the following) 3, 4

AND

Intersection Traffic Control = Two-way stop, All-way stop

Interchange Design

Treatments

Countermeasure Logic

Treatments

The following treatments are associated with the Interchange Design Countermeasure:

  • Change number of lanes on cross road at diamond interchange ramp from X to Y (CMF ID: 3053)

  • Change spacing distance between two ramp terminals at diamond interchange from X to Y feet (CMF ID: 3060)

  • Convert to roundabout interchanges (CMF ID: 11130)

  • Convert to roundabout interchanges (CMF ID: 11131)

  • Convert to roundabout interchanges (CMF ID: 11146)

  • Convert to roundabout interchanges (CMF ID: 11167)

  • Extend deceleration lane by approx. 100 ft (CMF ID: 475)

  • Provide an auxiliary lane between an entrance ramp and exit ramp (CMF ID: 3898)
    ​

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Interchange Design Countermeasure:

IF

Intersection Related = True

AND

Intersection Type = 2 - Roadway/roadway (interchange ramp terminal)

AND

Functional Class = Other Freeways and Expressways

Interchange Design -DDI or DCD

Treatments

Countermeasure Logic

Treatments

The following treatments are associated with the Interchange Design -DDI or DCD Countermeasure:

  • Convert at-grade intersections to Diverging Diamond Interchanges (CMF ID: 9658)

  • Convert diamond interchange to Diverging Diamond Interchange (DDI) or Double Crossover Diamond (DCD) (CMF ID: 9105)

  • Convert diamond interchange to Diverging Diamond Interchange (DDI) or Double Crossover Diamond (DCD) (CMF ID: 9106)


​

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Interchange Design -DDI or DCD Countermeasure:

IF

Intersection Related = True

AND

Intersection Type = 2 - Roadway/roadway (interchange ramp terminal)

AND

Approach Count = 4

Intersection Geometry -Sight or Skew Angle

Treatments

Countermeasure Logic

Treatments

The following treatments are associated with the Intersection Geometry -Sight or Skew Angle Countermeasure:

  • Change intersection sight distance (CMF ID: 9657)

  • Change intersection skew angle (CMF ID: 11274)

  • Change intersection skew angle (CMF ID: 11276)

  • Change right-turn lane geometry to increase line of sight (intersection level) (CMF ID: 8496)
    ​

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Intersection Geometry -Sight or Skew Angle Countermeasure:

IF

Intersection Related = True

AND

Approach Count = (Any of the following) 3, 4

Intersection Geometry -Roundabout Upgrade

Treatments

Countermeasure Logic

Treatments

The following treatments are associated with the Intersection Geometry -Roundabout Upgrade Countermeasure:

  • Conversion of intersection into high-speed roundabout (CMF ID: 10435)
    ​

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Intersection Geometry -Roundabout Upgrade Countermeasure:

IF

Intersection Related = True

AND

Intersection Geometry = 5 - Roundabout

AND

Approach Count = (Any of the following) 3, 4

Intersection Geometry -Signalized to Roundabout

Treatments

Countermeasure Logic

Treatments

The following treatments are associated with the Intersection Geometry -Signalized to Roundabout Countermeasure:

  • Conversion of signalized intersection into single- or multi-lane roundabout (CMF ID: 4195)


​

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Intersection Geometry -Signalized to Roundabout Countermeasure:

IF

Intersection Related = True

AND

Intersection Traffic Control = Signalized

AND

Intersection Geometry ≠ 5 - Roundabout

Intersection Geometry -Stop Controlled to Roundabout

Treatments

Countermeasure Logic

Treatments

The following treatments are associated with the Intersection Geometry -Stop Controlled to Roundabout Countermeasure:

  • Conversion of stop-controlled intersection into single-lane roundabout (CMF ID: 207)

  • Conversion of stop-controlled intersection into single-lane roundabout (CMF ID: 211)

  • Conversion of stop-controlled intersection to mini roundabout (CMF ID: 11241)

  • Conversion of stop-controlled intersection to mini roundabout (CMF ID: 11242)

  • Conversion of stop-controlled intersection to roundabout (CMF ID: 4874)


​

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Intersection Geometry -Stop Controlled to Roundabout Countermeasure:

IF

Intersection Related = True

AND

Intersection Traffic Control = (Any of the following) Two-way stop, All-way stop

AND

Intersection Geometry ≠ 5 - Roundabout

Intersection Geometry -Remove Driveway

Treatments

Countermeasure Logic

Treatments

The following treatments are associated with the Intersection Geometry -Remove Driveway Countermeasure:

  • Convert a 4-leg unsignalized intersection at driveways to a regular 4-leg unsignalized intersection (CMF ID: 3011)


​

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Intersection Geometry -Remove Driveway Countermeasure:

IF

Intersection Related = True

AND

Intersection Traffic Control = (Any of the following) Two-way stop, All-way stop

AND

Approach Count = 4

Intersection Geometry -CFI

Treatments

Countermeasure Logic

Treatments

The following treatments are associated with the Intersection Geometry -CFI Countermeasure:

  • Convert a conventional signalized intersection to a continuous flow intersection (CFI) (CMF ID: 10301)


​

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Intersection Geometry -CFI Countermeasure:

IF

Intersection Related = True

AND

Intersection Traffic Control = Signalized

AND

Approach Count = 4

Intersection Geometry -Continuous Green T

Treatments

Countermeasure Logic

Treatments

The following treatments are associated with the Intersection Geometry -Continuous Green T Countermeasure:

  • Convert a T intersection into a continuous green T intersection (CMF ID: 8656)


​

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Intersection Geometry -Continuous Green T Countermeasure:

IF

Intersection Related = True

AND

Intersection Traffic Control = Signalized

AND

Approach Count = 3

Intersection Geometry -4-leg into two 3-leg

Treatments

Countermeasure Logic

Treatments

The following treatments are associated with the Intersection Geometry -4-leg into two 3-leg Countermeasure:

  • Convert four-leg intersection into two three-leg intersections (CMF ID: 202)

  • Convert four-leg intersection into two three-leg intersections (CMF ID: 203)


​

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Intersection Geometry -4-leg into two 3-leg Countermeasure:

IF

Intersection Related = True

AND

Approach Count = 4

Intersection Geometry -MUT

Treatments

Countermeasure Logic

Treatments

The following treatments are associated with the Intersection Geometry -MUT Countermeasure:

  • Convert intersection to median U-turn (MUT) intersection (CMF ID: 10866)

  • Convert intersection to median U-turn (MUT) intersection (CMF ID: 10868)


​

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Intersection Geometry -MUT Countermeasure:

IF

Intersection Related = True

AND

Approach Count = 4

ANDIntersection Traffic Control = Signalized

ANDDivided by Median = True

Intersection Geometry -RCUT

Treatments

Countermeasure Logic

Treatments

The following treatments are associated with the Intersection Geometry -RCUT Countermeasure:

  • Convert intersection to restricted crossing U-turn (RCUT) intersection (CMF ID: 10383)


​

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Intersection Geometry -RCUT Countermeasure:

IF

Intersection Related = True

AND

Intersection Traffic Control = (any of the following) Signalized, Two-way stop, All-way stop

AND

Approach Count = 4

AND

Divided by Median = True

Intersection Geometry -Roundabout

Treatments

Countermeasure Logic

Treatments

The following treatments are associated with the Intersection Geometry -Roundabout Countermeasure:

  • Convert intersection to roundabout (CMF ID: 9156)


​

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Intersection Geometry -Roundabout Countermeasure:

IF

Intersection Related = True

AND

Crash Severity = Fatal

AND

Intersection Geometry ≠ 5 - Roundabout

Intersection Geometry -Channelized Right Turn Lane

Treatments

Countermeasure Logic

Treatments

The following treatments are associated with the Intersection Geometry -Channelized Right Turn Lane Countermeasure:

  • Improve angle of channelized right turn lane (CMF ID: 8431)


​

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Intersection Geometry -Channelized Right Turn Lane Countermeasure:

IF

Intersection Related = True

AND

Manner of Collision = (Any of the following) Turning Right, Other

Intersection Geometry -Stop Controlled

Treatments

Countermeasure Logic

Treatments

The following treatments are associated with the Intersection Geometry -Stop Controlled Countermeasure:

  • Improve Left-Turn Lane Offset to Create Positive Offset (CMF ID: 6096)

  • Install left-turn lane (CMF ID: 7852)

  • Installation of left-turn lanes on both major road approaches (CMF ID: 2969)

  • Installation of left-turn lanes on both major road approaches (CMF ID: 3018)

  • Introduce painted left-turn channelization (CMF ID: 281)

  • Introduce raised/curb left-turn channelization (CMF ID: 279)

  • Provide a left-turn lane on both major-road approaches (CMF ID: 268)

  • Provide a left-turn lane on one major-road approach (CMF ID: 260)

  • Provide a left-turn lane on one major-road approach (CMF ID: 264)

  • Provide a right-turn lane on both major-road approaches (CMF ID: 289)

  • Provide a right-turn lane on one major-road approach (CMF ID: 287)

  • Provide a right-turn lane on one major-road approach (CMF ID: 2967)

  • Provide a right-turn lane on one major-road approach (CMF ID: 2971)


​

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Intersection Geometry -Stop Controlled Countermeasure:

IF

Intersection Related = True

AND

Intersection Traffic Control = Two-way stop, All-way stop

Intersection Geometry

Treatments

Countermeasure Logic

Treatments

The following treatments are associated with the Intersection Geometry Countermeasure:

  • Provide Right Turn Channelization (CMF ID: 11152)

  • Install J-Turn intersection (CMF ID: 11151)

  • Install left-turn lane (CMF ID: 3948)

  • Install left-turn lane (CMF ID: 3950)

  • Painted channelization of left-turn lane on major road (CMF ID: 251)

  • Painted channelization of left-turn lane on major road (CMF ID: 252)

  • Physical channelization of both major and minor roads (CMF ID: 292)

  • Physical channelization of both major and minor roads (CMF ID: 293)

  • Physical channelization of right-turn lane on major road (CMF ID: 283)

  • Physical channelization of right-turn lane on major road (CMF ID: 284)

  • Provide a channelized left-turn lane on both major- and minor-road approaches (CMF ID: 249)

  • Provide a channelized left-turn lane on both major-road approaches (CMF ID: 250)

  • Provide a channelized left-turn lane on both major-road approaches (CMF ID: 256)

  • Provide a channelized left-turn lane on both major-road approaches (CMF ID: 257)


​

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Intersection Geometry Countermeasure:

IF

Intersection Related = True

Intersection Geometry -Signalized

Treatments

Countermeasure Logic

Treatments

The following treatments are associated with the Intersection Geometry -Signalized Countermeasure:

  • Install left-turn lane at signalized intersection (CMF ID: 7998)

  • Presence of exclusive right turn phase at diamond interchange ramps (CMF ID: 3057)

  • Introducing zero or positive offset left-turn lane on crossing roadway (CMF ID: 276)

  • Provide a left-turn lane on both major-road approaches (CMF ID: 271)

  • Provide a left-turn lane on one major-road approach (CMF ID: 263)


​

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Intersection Geometry -Signalized Countermeasure:

IF

Intersection Related = True

AND

Intersection Traffic Control = Signalized

Intersection Traffic Control -Pedestrian Phasing

Treatments

Countermeasure Logic

Treatments

The following treatments are associated with the Intersection Traffic Control -Pedestrian Phasing Countermeasure:

  • Add exclusive pedestrian phasing (CMF ID: 5244)

  • Increase length of signal phases to allow pedestrians more crossing time (CMF ID: 5252)

  • Install pedestrian countdown timer (CMF ID: 5272)


​

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Intersection Traffic Control -Pedestrian Phasing Countermeasure:

IF

Intersection Related = True

AND

Intersection Traffic Control = Signalized

AND

SHSP - Pedestrian Involved Crashes = True

Intersection Traffic Control -Interchange

Treatments

Countermeasure Logic

Treatments

The following treatments are associated with the Intersection Traffic Control -Interchange Countermeasure:

  • Change difference between actual and ITE-recommended yellow change interval from X to Y seconds at diamond interchange ramps (CMF ID: 3054)


​

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Intersection Traffic Control -Interchange Countermeasure:

IF

Intersection Related = True

AND

Intersection Type = 2 - Roadway (Interchange Ramp Terminal)

Intersection Traffic Control -Signalized

Treatments

Countermeasure Logic

Treatments

The following treatments are associated with the Intersection Traffic Control -Signalized Countermeasure:

  • Change from 5-section "doghouse" protected/permissive left turn to flashing yellow arrow protected/permissive left turn (CMF ID: 7695)

  • Change from permitted or permitted-protected to protected (CMF ID: 333)

  • Change from permitted to protected on minor approach (CMF ID: 335)

  • Change from permitted-protected to protected on major approach (CMF ID: 339)

  • Change from permitted-protected to protected on minor approach (CMF ID: 337)

  • Change permissive left-turn phasing to protected only or protected/permissive (CMF ID: 9891)

  • Changing left turn phasing from protected-permissive to flashing yellow arrow (FYA) (CMF ID: 9669)

  • Implement systemic signing and visibility improvements at signalized intersections (CMF ID: 8962)

  • Improve signal visibility, including signal lens size upgrade, installation of new back-plates, addition of reflective tapes to existing back-plates, and installation of additional signal heads (CMF ID: 4110)

  • Improve signal visibility, including signal lens size upgrade, installation of new back-plates, addition of reflective tapes to existing back-plates, and installation of additional signal heads (CMF ID: 4111)

  • Improve signal visibility, including signal lens size upgrade, installation of new back-plates, addition of reflective tapes to existing back-plates, and installation of additional signal heads (CMF ID: 4112)

  • Improve signal visibility, including signal lens size upgrade, installation of new back-plates, addition of reflective tapes to existing back-plates, and installation of additional signal heads (CMF ID: 4113)

  • Increase all red clearance interval (CMF ID: 4211)

  • Convert signal from span wire to mast arm (CMF ID: 9404)

  • Increase total change interval (greater than ITE recommended practice) (CMF ID: 4221)

  • Increase total change interval (greater than ITE recommended practice) (CMF ID: 4222)

  • Increase total change interval (remains less than ITE recommended practice) (CMF ID: 4216)

  • Increase yellow change interval (CMF ID: 4209)

  • Install adaptive traffic signal control (CMF ID: 10269)

  • Install adaptive traffic signal control (CMF ID: 10561)

  • Install adaptive traffic signal control (CMF ID: 10562)

  • Install Dynamic All-Red Extension (DARE) (CMF ID: 11228)

  • Install left turn flashing yellow arrow signals and supplemental traffic signs (CMF ID: 7730)

  • Modify signal phasing (implement a leading pedestrian interval) (CMF ID: 9917)

  • Protected/permissive to protected-only left turn phasing (CMF ID: 10746)

  • Protected/permissive to protected-only left turn phasing (CMF ID: 10747)

  • Protected/permissive to protected-only left turn phasing (CMF ID: 11159)

  • Protected/permissive to protected-only left turn phasing (CMF ID: 11164)

  • Provide flashing beacons at stop controlled intersections (CMF ID: 446)

  • Increase yellow change interval (CMF ID: 4210)


​

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Intersection Traffic Control -Signalized Countermeasure:

IF

Intersection Related = True

AND

Intersection Traffic Control = Signalized

Intersection Traffic Control -Stop Control

Treatments

Countermeasure Logic

Treatments

The following treatments are associated with the Intersection Traffic Control -Stop Control Countermeasure:

  • Convert minor-road stop control to all-way stop control (CMF ID: 312)

  • Convert minor-road stop control to all-way stop control (CMF ID: 313)

  • Convert minor-road stop control to all-way stop control (CMF ID: 3128)

  • Convert two-way (with flashing beacons) to all-way stop control (with flashing beacons) (CMF ID: 3134)

  • Convert two-way (without flashing beacons) to all-way stop control (with flashing beacons) (CMF ID: 3112)

  • Convert two-way (without flashing beacons) to all-way stop control (with flashing beacons) (CMF ID: 3137)

  • Convert two-way (without flashing beacons) to all-way stop control (without flashing beacons) (CMF ID: 3131)

  • Implement systemic signing and marking improvements at stop-controlled intersections (CMF ID: 8903)

  • Increase retroreflectivity of STOP signs (CMF ID: 6048)

  • Increase retroreflectivity of STOP signs (CMF ID: 6049)

  • Increase retroreflectivity of STOP signs (CMF ID: 6068)

  • Install a traffic signal (CMF ID: 325)

  • Install a traffic signal (CMF ID: 7845)

  • Install a traffic signal (CMF ID: 7848)

  • Install a traffic signal (CMF ID: 7981)

  • Install a traffic signal (CMF ID: 7982)

  • Install a traffic signal (CMF ID: 9145)

  • Install a traffic signal (CMF ID: 9146)

  • Install a traffic signal (major road speed limit at least 40 mph) (CMF ID: 322)

  • Install a traffic signal and left turn lanes (CMF ID: 7968)

  • Replace standard stop sign with flashing LED stop sign (CMF ID: 6602)


​

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Intersection Traffic Control -Stop Control Countermeasure:

IF

Intersection Related = True

AND

Intersection Traffic Control = (Any of the following) Two-way stop, All-way stop

Intersection Traffic Control -Night

Treatments

Countermeasure Logic

Treatments

The following treatments are associated with the Intersection Traffic Control -Night Countermeasure:

  • Replace Night-Time Flash with Steady Operation (CMF ID: 389)

  • Replace Night-Time Flash with Steady Operation (CMF ID: 2027)

  • Modify night-time flash operation period (CMF ID: 2030)


​

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Intersection Traffic Control -Night Countermeasure:

IF

Intersection Related = True

AND

Intersection Traffic Control = Signalized

AND

CF - Event - Night = True

Intersection Traffic Control -Right Turn

Treatments

Countermeasure Logic

Treatments

The following treatments are associated with the Intersection Traffic Control -Right Turn Countermeasure:

  • Permit right-turn-on-red (CMF ID: 376)

  • Permit right-turn-on-red (CMF ID: 377)


​

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Intersection Traffic Control -Right Turn Countermeasure:

IF

Intersection Related = True

AND

Intersection Traffic Control = Signalized

AND

V4 - Vehicle Maneuver/Action = Turning Right

Roadside -Sight

Treatments

Countermeasure Logic

Treatments

The following treatments are associated with the Roadside -Sight Countermeasure:

  • Increase triangle sight distance (CMF ID: 307)

  • Increase triangle sight distance (CMF ID: 308)
    ​

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Roadside -Sight Countermeasure:

IF

Intersection Related = True

AND

Approach Count = 4

Roadway -Pavement Friction

Treatments

Countermeasure Logic

Treatments

The following treatments are associated with the Roadway -Pavement Friction Countermeasure:

  • Improve pavement friction (increase skid resistance) (CMF ID: 2270)

  • Install high friction surface treatment (HFST) (CMF ID: 11449)


​

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Roadway -Pavement Friction Countermeasure:

IF

Intersection Related = True

AND

C16 - Roadway Surface Condition = Wet

Roadway -Rumble Strips

Treatments

Countermeasure Logic

Treatments

The following treatments are associated with the Roadway -Rumble Strips Countermeasure:

  • Install transverse rumble strips on stop controlled approaches in rural areas (CMF ID: 2707)

  • Install transverse rumble strips on stop controlled approaches in rural areas (CMF ID: 2709)

  • Install transverse rumble strips on stop controlled approaches in rural areas (CMF ID: 9033)

  • Install transverse rumble strips on stop controlled approaches in rural areas (CMF ID: 9034)

  • Install transverse rumble strips on stop controlled approaches in rural areas (CMF ID: 9046)

  • Install transverse rumble strips on stop controlled approaches in rural areas (CMF ID: 9047)


​

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Roadway -Rumble Strips Countermeasure:

IF

Intersection Related = True

AND

Intersection Traffic Control = (Any of the following) Two-way stop, All-way stop

AND

Divided by Median = True

AND

Urban/Rural = Rural

Roadway -Road Diet

Treatments

Countermeasure Logic

Treatments

The following treatments are associated with the Roadway -Road Diet Countermeasure:

  • Road diet (Convert 4-lane undivided road to 2-lanes plus turning lane) (CMF ID: 11133)
    ​

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Roadway -Road Diet Countermeasure:

IF

Intersection Related = True

AND

Approach Count = (Any of the following) 3, 4

AND

# of Lanes = 4

AND

Divided by Median = False

Signs -Advanced Street Name

Treatments

Countermeasure Logic

Treatments

The following treatments are associated with the Signs -Advanced Street Name Countermeasure:

  • Advance street name signs (CMF ID: 2449)
    ​

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Signs -Advanced Street Name Countermeasure:

IF

Intersection Related = True

AND

Intersection Traffic Control = Signalized

AND

Approach Count = (Any of the following) 3, 4

Signs -VEWF

Treatments

Countermeasure Logic

Treatments

The following treatments are associated with the Signs -VEWF Countermeasure:

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Signs -VEWF Countermeasure:

  • Install a "Vehicles Entering When Flashing" (VEWF) system (advance post mounted signs on major and loops on minor) (CMF ID: 4917)

  • Install a "Vehicles Entering When Flashing" (VEWF) system (combination of overhead and advance post mounted signs) (CMF ID: 4923)

  • Install a "Vehicles Entering When Flashing" (VEWF) system (overhead signs at intersection on minor and loops on major) (CMF ID: 4911)

IF

Intersection Related = True

AND

Intersection Traffic Control = Two-way stop

AND

Approach Count = 4

AND

# of Lanes = 2

Signs -ICWS

Treatments

Countermeasure Logic

Treatments

The following treatments are associated with the Signs -ICWS Countermeasure:

  • Install an intersection conflict warning system (ICWS) with a combination of overhead and advanced post mounted signs (various messages) and flashers (CMF ID: 8476)

  • Install an intersection conflict warning system (ICWS) with overhead signs (various messages) and flashers at the intersection on major; loop on minor (CMF ID: 8456)

  • Install an intersection conflict warning system (ICWS) with post mounted signs (various messages) and flashers at the intersection on minor; loop on major (CMF ID: 8472)

  • Install an intersection conflict warning system (ICWS) with post mounted signs (various messages) and flashers in advance of the intersection on major; loop on minor (CMF ID: 8464)

  • Install intersection conflict warning systems (ICWS) for four-lane at two-lane intersections (CMF ID: 8447)

  • Install intersection conflict warning systems (ICWS) for two-lane at two-lane intersections (CMF ID: 8442)

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Signs -ICWS Countermeasure:

IF

Intersection Related = True

AND

Approach Count = 4

AND

Intersection Traffic Control = (Any of the following) Two-way stop, All-way stop

Transit

Treatments

Countermeasure Logic

Treatments

The following treatments are associated with the Transit Countermeasure:

  • Implement transit signal priority (CMF ID: 10751)

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Transit Countermeasure:

IF

Intersection Related = True

AND

Intersection Traffic Control = Signalized

AND

CF - Involving Veh - Bus = True

Speeding & Aggressive Driving Improvements

Treatments

The following treatments are associated with the Speeding & Aggressive Driving Improvements Countermeasure:

  • Install edgelines (tangent)

  • Lower posted speed by 10 mph

  • Lower posted speed by 15-20 mph

  • Lower posted speed by 5 mph

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Speeding & Aggressive Driving Improvements Countermeasure:

IF

SHSP - Speeding & Aggressive Driving Related Crashes Filter = True

Roadway Departure Improvements

Treatments

The following treatments are associated with the Roadway Departure Improvements Countermeasure:

  • Increase Median Width

  • Install centerline rumble strips (tangents)

  • Install centerline rumble strips on roads with existing shoulder rumble strips

  • Install median barrier

  • Install post-mounted delineators

  • Install roadside barrier

  • Install shoulder rumble strips (tangents)

  • Install shoulder rumble strips on illuminated highways

  • Install shoulder rumble strips on roads with existing centerline rumble strips

  • Install shoulder rumble strips on unilluminated highways

  • Install wider markings with resurfacing

  • Install wider markings WITHOUT resurfacing

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Roadway Departure Improvements Countermeasure:

IF

SHSP - Roadway Departure Crashes Filter = True

Older Driver Improvements

Treatments

The following treatments are associated with the Older Driver Improvements Countermeasure:

  • Install snowplowable, permanent raised pavement markers

  • Install snowplowable, permanent raised pavement markers (Radius greater than 1640 ft)

  • Install snowplowable, permanent raised pavement markers (Radius less than or equal to 1640 ft)

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Older Driver Improvements Countermeasure:

IF

SHSP - Crashes Involving Drivers Age 65+ Filter = True

Impaired Driver Improvements

Treatments

The following treatments are associated with the Impaired Driver Improvements Countermeasure:

  • Install cable median barrier (high tension)

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Impaired Driver Improvements Countermeasure:

IF

SHSP - Alcohol and Drug Impaired Crashes Filter = True

No Occupant Protection Improvements

Treatments

There are no treatments are associated with the No Occupant Protection Improvements Countermeasure.

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the No Occupant Protection Improvements Countermeasure:

IF

SHSP - No Occupant Protection Used Filter = True

Pedestrian Improvements

Treatments

There are no treatments are associated with the Pedestrian Improvements Countermeasure.
​

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Pedestrian Improvements Countermeasure:

IF

SHSP - Pedestrian Involved Crashes Filter = True

Wet Road Crashes Improvements

Treatments

The following treatments are associated with the Wet Road Crashes Improvements Countermeasure:

  • Improve pavement friction (Chip Seal)

  • Improve pavement friction (Diamond grinding)

  • Improve pavement friction (Microsurfacing)

  • Improve pavement friction (OGFC-Open Graded Friction Course)

  • Improve pavement friction (Slurry seal)

  • Improve pavement friction (Thin HMA-Hot Mix Asphalt)

  • Improve pavement friction (UTBWC-Ultra thin bonded wearing course)

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Wet Road Crashes Improvements Countermeasure:

IF

CF - Event - Wet Road Filter = True

Commercial Motor Vehicle Crashes Improvements

Treatments

The following treatments are associated with the Commercial Motor Vehicle Crashes Improvements Countermeasure:

  • Implement truck lane restrictions on 4-lane freeways

  • Implement truck lane restrictions on 4-lane freeways (truck crashes)

  • Implement truck lane restrictions on multilane freeways

  • Implement truck lane restrictions on multilane freeways (<10000 vpdpl)

  • Increase lateral clearance from 10 to 40 feet

  • Increase shoulder width from 0 to 10 feet

  • Install dynamic speed feedback sign

  • Install light-reflecting devices

  • Install profiled thermoplastic pavement markings

  • Install Red-light indicator lights

  • Install transit signal priority (TSP) technology (transit-related crashes)

  • Provide passing lane or climbing lane

  • Road diet (Convert 4-lane undivided road to 2-lanes plus turning lane) - commercial areas, target crashes

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Commercial Motor Vehicle Crashes Improvements Countermeasure:

IF

CF - Involving Veh - CMV Filter = True

Vulnerable Road Users Improvements

Treatments

The following treatments are associated with the Vulnerable Road Users Improvements Countermeasure:

  • Allow parking on both sides of road

  • Convert from paved shoulder to other

  • Increase lane width by 1 ft

  • Increase median width by 1 ft

  • Install enhanced RRFB pedestrian crossing at mid-block crossing location

  • Install raised median with marked crosswalk (uncontrolled)

  • Install raised median with or without marked crosswalk (uncontrolled)

  • Install raised median with unmarked crosswalk (uncontrolled)

  • Install raised pedestrian crosswalks

  • Install rectangular rapid flashing beacon (RRFB)

  • Install separated bicycle lane

  • Install shared path

  • Install sidewalk

  • Install sidewalk barrier

  • Median treatment for ped/bike safety

  • Presence of a pedestrian crosswalk at midblock locations

  • Presence of bus stops (bike crashes)

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Vulnerable Road Users Improvements Countermeasure:

IF

CF - Involving Non-Motorist - Non-Motorist (All) Filter = True

Nighttime Crashes Improvements

Treatments

The following treatments are associated with the Nighttime Crashes Improvements Countermeasure:

  • Improve street lighting illuminance uniformity

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Nighttime Crashes Improvements Countermeasure:

IF

CF - Event - Night Filter = True

School Zone Crashes Improvements

Treatments

The following treatments are associated with the School Zone Crashes Improvements Countermeasure:

  • Implement Safe Routes to School Program

  • Implement to Safe Routes to School Program (Age 5-12)

  • Install high-visibility yellow, continental type crosswalks at schools

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the School Zone Crashes Improvements Countermeasure:

IF

CF - School Zone Related Filter = True

Work Zone Crashes Improvements

Treatments

The following treatments are associated with the Work Zone Crashes Improvements Countermeasure:

  • Active work with temporary lane closure (compared to no work zone)

  • Implement left-hand merge and downstream lane shift (Iowa weave)

  • Increasing the inside shoulder width inside the work zone by one foot

  • Increasing the outside shoulder width inside the work zone by one foot

  • No active with no lane closure (compared to no work zone)

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Work Zone Crashes Improvements Countermeasure:

IF

CF - Work Zone Related Filter = True

Motorcycle/ATV Involved Crashes Improvements

Treatments

There are no treatments associated with the Motorcycle/ATV Involved Crashes Improvements Countermeasure.

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Motorcycle/ATV Involved Crashes Improvements Countermeasure:

IF

CF - Involving Veh - ATV & Motorcycle Filter = True

Distracted/Fatigued Driver Involved Crashes Improvements

Treatments

There are no treatments associated with the Distracted/Fatigued Driver Involved Crashes Improvements Countermeasure.

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Distracted/Fatigued Driver Involved Crashes Improvements Countermeasure:

IF

CF - Involving Driver - Distracted Driver (Any Reason) Filter = True

OR

CF - Involving Driver - Fatigued Driver Filter = True

Wrong-Way Crashes Improvements

Treatments

The following treatments are associated with the Wrong-Way Crashes Improvements Countermeasure:

  • Active work with no lane closure (compared to no work zone)

  • Add a through lane on both directions and a raised median

  • Build and operate travel information centers/rest area

  • Change street surface condition from poor to good

  • Change urban or suburban roadway cross-section

  • Convert 12-foot lanes to 10-foot lanes

  • Convert 12-foot lanes to 11-foot lanes

  • Convert 12-foot lanes to 9-foot or less

  • Convert 2 lane roadway to 4 lane divided roadway

  • Convert a TWLTL to a raised median

  • Convert from two-way to one-way traffic

  • Converting four-lane roadways to three-lane roadways with center turn lane (road diet)

  • Flatten horizontal curve

  • Four to five lane conversion

  • Implement mobile automated speed enforcement system (highly enforced sites)

  • Implement truck lane restrictions

  • Improve street lighting illuminance and uniformity

  • Increase from 4 lanes to 6 lanes

  • Increase lane width

  • Increase lane width from 11 feet to 12 feet

  • Increase pavement marking retroreflectivity

  • Increase vertical grade by 1%

  • Install 10 mph differential speed limit on rural Interstate Highways

  • Install alternative audible lane departure warning treatments

  • Install an additional lane

  • Install bicycle lanes

  • Install centerline and shoulder rumble strips

  • Install centerline rumble strips

  • Install curb and gutter

  • Install edgeline pavement markings on narrow, rural, two-lane roads

  • Install edgeline rumble strips on roadways with a shoulder width less than 5 feet

  • Install edgeline rumble strips on roadways with a shoulder width of 5 feet or greater

  • Install guiderail

  • Install high friction surface treatment (HFST)

  • Install lighting

  • Install pedestrian fencing

  • Install periodic passing lanes on rural two-lane highways

  • Install safety edge treatment

  • Install shoulder rumble stripe, widen shoulder from 0 to 2 feet, and pavement resurfacing

  • Install shoulder rumble strips and widen shoulder width

  • Install shoulder rumble strips on roadways with a shoulder width equal to 5 feet

  • Install shoulder rumble strips on roadways with a shoulder width less than 5 feet

  • Install stop sign at highway-rail crossing

  • Install TWLTL (two-way left turn lane) on four lane road

  • Install TWLTL (two-way left turn lane) on two lane road

  • Install wider markings and both edgeline and centerline rumble strips with resurfacing

  • Install wider markings and edgeline rumble strips with resurfacing

  • Install wider markings and shoulder rumble strips with resurfacing

  • Installation of fixed speed cameras

  • Provide a raised median

  • Provide Truck Climbing Lane

  • Removing mainline barrier toll plazas on highways

  • Road diet (Convert 4-lane undivided road to 2-lanes plus turning lane)

  • Road diet (Convert 4-lane undivided road to 2-lanes plus turning lane) - high driveway density

  • Road diet (Convert 4-lane undivided road to 2-lanes plus turning lane) - high driveway density, target crashes

  • Road diet (Convert 4-lane undivided road to 2-lanes plus turning lane) - low driveway density

  • Road diet (Convert 4-lane undivided road to 2-lanes plus turning lane) - low driveway density, target crashes

  • Widen shoulder

  • Widen shoulder width to 5 feet or greater

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Wrong-Way Crashes Improvements Countermeasure:

IF

CF - Event - Wrong-Way Driving Filter = True

Head-On Crashes Improvements

Treatments

The following treatments are associated with the Head-On Crashes Improvements Countermeasure:

  • Install a combination of shoulder rumble stripes, shoulder widening (from 0 to 2 ft) and resurface pavement

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Head-On Crashes Improvements Countermeasure:

IF

CF - Event - Lane Departure - Cross Median or Centerline Filter = True

Roll Over Crashes Improvements

Treatments

The following treatments are associated with the Roll Over Crashes Improvements Countermeasure:

  • Install cable median barrier

  • Install shoulder rumble strips

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Roll Over Crashes Improvements Countermeasure:

IF

CF - Event - Rollover Filter = True

Immersion Crashes Improvements

Treatments

There are no associated treatments with the Immersion Crashes Improvements Countermeasure.

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Immersion Crashes Improvements Countermeasure:

IF

CF - Event - Immersion (Water) Filter = True

Fixed Object Crashes Improvements

Treatments

The following treatments are associated with the Fixed Object Crashes Improvements Countermeasure:

  • Increase distance to roadside features from 16.7 ft to 30 ft

  • Increase distance to roadside features from 3.3 ft to 16.7 ft

  • Install concrete guardrail in median

  • Install crash cushions at fixed roadside features

  • Install edgeline or shoulder rumble strips

  • Remove or relocate fixed objects outside of clear zone

  • Remove/Relocate Utility Poles

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Fixed Object Crashes Improvements Countermeasure:

IF

CF - Event - Fixed Object - Struck Fixed Object Filter = True

Bridge Crashes Improvements

Treatments

The following treatments are associated with the Bridge Crashes Improvements Countermeasure:

  • Short-term effects of all measures to control snow, slush or ice

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Bridge Crashes Improvements Countermeasure:

IF

CF - Event - Bridge - Struck Bridge Filter = True

AND

CF - Event - Bridge - Bridge Crashes Resulting in Immersion Filter = True

Curve Improvements

Treatments

The following treatments are associated with the Curve Improvements Countermeasure:

  • Advance static curve warning signs

  • Flatten crest vertical curve

  • Improve Curve Delineation

  • Improve pavement friction (HFS-High Friction Surfacing)

  • Install cable median barrier (low or high tension on curve)

  • Install centerline rumble strips (horizontal curves)

  • Install centerline rumble strips on horizontal curves

  • Install chevron signs on horizontal curves

  • Install edgeline rumble strips at horizontal curve

  • Install edgelines (curves)

  • Install edgelines (tangents and curves)

  • Install edgelines and centerlines at sites with higher incidences of crashes

  • Install edgelines, centerlines, and post-mounted delineators

  • Install guiderail with delineators

  • Install icy curve warning system

  • Install new fluorescent curve signs or upgrade existing curve signs to fluorescent sheeting

  • Install oversized chevron signs

  • Install raised pavement markers

  • Install raised pavement markers and transverse rumble strips on approach to horizontal curves

  • Install raised pavement markers with restriping (center and edgelines)

  • Install shoulder rumble strips (horizontal curves)

  • Pave shoulder

  • Place edgeline and centerline markings

  • Place standard edgeline marking (4-6 in)

  • Place wide (8 inches) edgeline markings

  • Placing edgelines and background/ directional markings on horizontal curves

  • Provide 2-ft paved shoulders (both sides)

  • Raise posted speed by 10-15 mph

  • Raise posted speed by 5 mph

  • Safety effects of horizontal curves and tangents at type 1 crest vertical curves – tangents at type 1 crests

  • Safety effects of horizontal curves and tangents at type 2 crest vertical curves – tangents at type 2 crests

  • Safety effects of horizontal curves and tangents at type 2 sag vertical curves – tangents at type 2 sags

  • Widen shoulder (paved) (from 0 to 4 ft)

  • Widen shoulder (paved) (from 0 to 6 ft)

  • Widen shoulder (paved) (from 0 to 8 ft)

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Curve Improvements Countermeasure:

IF

CF - Event - Curve - Horizontal Curve Filter = True

AND

CF - Event - Curve - Vertical Curve Filter = True

Animal Crashes Improvements

Treatments

The following treatments are associated with the Animal Crashes Improvements Countermeasure:

  • Add wildlife crossing structure with fencing

  • Gravel right shoulder

  • Presence of two-lane roadway vs. greater than two-lane roadway

Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Animal Crashes Improvements Countermeasure:

IF

CF - Event - Animal Involved Filter = True

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