Skip to main content

WVDOT - Countermeasure Logic

Lauren Miller avatar
Written by Lauren Miller
Updated over 3 weeks ago

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

TreatmentsCountermeasure Logic

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

Did this answer your question?