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.

Speed Management

Appropriate Speed Limits for All Road Users - Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Appropriate Speed Limits for All Road Users Countermeasure:

Contributing Factor = (Any of the following) Excessive Speed, Speed too Fast for Conditions

Speed Safety Cameras - Treatments

The following treatments are associated with the Speed Safety Cameras Countermeasure:

Install Automated Section Speed Enforcement System (CMF ID: 7718)
Implement Automated Speed Enforcement Cameras (CMF ID: 2915)

Speed Safety Cameras - Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Speed Safety Cameras

Countermeasure:

Contributing Factor = (Any of the following) Excessive Speed, Speed too Fast for Conditions

Variable Speed Limits - Treatments

The following treatments are associated with the Speed Safety Cameras Countermeasure:

Install Variable Speed Limit (Vsl) (CMF ID: 11002)

Variable Speed Limits - Countermeasure Logic

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

Functional System = (Any of the following) Interstate, Principal Arterial - Other Freeways and Expressways

AND

Posted Speed = (Any of the following) 45, 50, 55, 60, 65, 70, 75, 80

Pedestrian/Bicyclist

Bicycle Lanes - Treatments

The following treatments are associated with the Bicycle Lanes Countermeasure:

Convert Traditional Or Flush Buffered Bike Lane To Sbl With Flexi-Posts (CMF ID: 11296)
Install Bicycle Lanes (CMF ID: 10738)

Bicycle Lanes - Countermeasure Logic

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

Pedalcycle Involvement = True

AND

PDPC Actions at Time of Crash = (Any of the following) Failure to Yield Right-of-Way Action at Time of Crash, Failure to Obey Traffic Signs (Signals), In Roadway Improperly, Improper Turn/Merge, Improper Passing

Crosswalk Visibility Enhancements -Treatments

The following treatments are associated with the Crosswalk Visibility Enhancements Countermeasure:

Install High-Visibility Crosswalk (CMF ID: 4123)
Provide Intersection Illumination (CMF ID: 436)

Crosswalk Visibility Enhancements - Countermeasure Logic

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

Pedestrian Involvement = True

AND

Intersection Involvement = True

AND

PDPC Actions Prior to Crash = (Any of the following) Crossing Roadway, In Roadway - Other

Leading Pedestrian Interval - Treatments

The following treatments are associated with the Leading Pedestrian Interval Countermeasure:

Modify Signal Phasing (Implement A Leading Pedestrian Interval) (CMF ID: 9918)

Leading Pedestrian Interval - Countermeasure Logic

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

Intersection Involvement = True

AND

Traffic Control Device = No Controls

AND

First Harmful Event - Analysis = Pedestrian

Medians and Pedestrian Refuge Islands -Treatments

The following treatments are associated with the Medians and Pedestrian Refuge Islands Countermeasure:

Install Raised Median With Marked Crosswalk (Uncontrolled) (CMF ID: 175)

Medians and Pedestrian Refuge Islands - Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Medians and Pedestrian Refuge Islands Countermeasure:

Intersection Involvement = False

Traffic Control Device = No Controls

AND

Pedestrian Involvement = True

AND

PDPC Actions Prior to Crash = (Any of the following) Moving With Traffic, In Roadway - Other, Moving Against Traffic

Pedestrian Hybrid Beacons - Treatments

The following treatments are associated with the Leading Pedestrian Interval Countermeasure:

Install A Pedestrian Hybrid Beacon (Phb Or Hawk) (CMF ID: 9020)

Pedestrian Hybrid Beacons - Countermeasure Logic

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

Pedestrian Involvement = True

AND

HPMS Median = Curbed-Raised

AND

Through Lanes ≥ 2

AND

Speed Limit ≥ 35

Rectangular Rapid Flashing Beacons (RRFB) - Treatments

The following treatments are associated with the Rectangular Rapid Flashing Beacons (RRFB) Countermeasure:

Install Rectangular Rapid Flashing Beacon (Rrfb) (CMF ID: 9024)

Rectangular Rapid Flashing Beacons (RRFB) - Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Rectangular Rapid Flashing Beacons (RRFB) Countermeasure:

Pedestrian Involvement = True

AND

Intersection Involvement = False

AND

PDPC Actions Prior to Crash = (Any of the following) Crossing Roadway, Moving With Traffic, Moving Against Traffic

Road Diets (Roadway Reconfiguration) - Treatments

The following treatments are associated with the Road Diets (Roadway Reconfiguration) Countermeasure:

Converting Four-Lane Roadways To Three-Lane Roadways With Center Turn Lane (Road Diet) (CMF ID: 5554)

Road Diets (Roadway Reconfiguration) - Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Road Diets (Roadway Reconfiguration) Countermeasure:

First Harmful Event - Analysis = Pedalcycle

AND

Functional System = Interstate

AND

Through Lanes = 4

AND

Urban/Rural = Urban

Walkways - Countermeasure Logic

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

PDPC Actions Prior to Crash = (Any of the following) Moving Against Traffic, Moving With Traffic, In Roadway - Other,

Adjacent to Roadway (Shoulder, Median), Walking/Cycling on Sidewalk

Roadway Departure

Enhanced Delineation for Horizontal Curves - Treatments

The following treatments are associated with the Enhanced Delineation for Horizontal Curves Countermeasure:

Install Chevron Signs On Horizontal Curves (CMF ID: 2439)
Install Oversized Chevron Signs (CMF ID: 8978)
Install In-Lane Curve Warning Pavement Markings (CMF ID: 10312)

Enhanced Delineation for Horizontal Curves - Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Enhanced Delineation for Horizontal Curves Countermeasure:

Intersection Involvement = False

AND

Road Character = Curve

AND

First Harmful Event - Analysis = (Any of the following) Overturn/Rollover, Other Fixed Object, Utility Box, Culvert, Traffic Barrier, Other, Mailbox, Fire Hydrant, Cable, Traffic Signal Support, Guardrail End, Ditch, Wall or Building, Embankment, Concrete, Traffic Sign Support, Other Post, Pole or Support, Tree (standing), Utility Pole/Light Support, Curb, Fence

Longitudinal Rumble Strips and Stripes on Two-Lane Roads - Treatments

The following treatments are associated with the Longitudinal Rumble Strips and Stripes on Two-Lane Roads Countermeasure:

Install Centerline Rumble Strips (CMF ID: 3358)
Install Shoulder Rumble Strips With An Offset Of 9-20 Inches Relative To The Edgeline (CMF ID: 3648)
Install Shoulder Rumble Strips (CMF ID: 3425)

Longitudinal Rumble Strips and Stripes on Two-Lane Roads - Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Longitudinal Rumble Strips and Stripes on Two-Lane Roads Countermeasure:

Crash Analysis = (Any of the following) Non-Collision - Vehicle Ran Across Open Area, Vehicle Crossed Shoulder To Other Roadway, Vehicle Crossed Median - Out Of Control

Crash Analysis = (Contains) Fixed

AND

Intersection Involved = False

AND

Number of Motor Vehicles Involved = 1

AND

Speed Limit ≥ 55

Median Barriers - Treatments

The following treatments are associated with the Median Barriers Countermeasure:

Install Median Barrier (CMF ID: 7040)

Median Barriers - Countermeasure Logic

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

Crash Analysis = (Contains) Fixed

AND

Crash Analysis = (Any of the following) Overturn/Rollover - Left Side of Road

Vehicle Crossed Median - Out of Control

AND

First Harmful Event - Manner of Crash = From Opposite Direction

AND

First Harmful Event - Manner of Impact = Front-to-Front, Sideswipe

AND

HPMS Median ≠ Positive Barrier - rigid, Positive Barrier - flexible, Positive Barrier - semi-rigid, Positive Barrier - unspecified, Curbed-Raised

Roadside Design Improvements at Curves - Treatments

The following treatments are associated with the Roadside Design Improvements at Curves Countermeasure:

Flatten Sideslope From 1V:3H To 1V:4H (CMF ID: 4627)
Flatten Sideslope From 1V:4H To 1V:6H (CMF ID: 4632)

Roadside Design Improvements at Curves - Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Roadside Design Improvements at Curves Countermeasure:

Intersection Involvement = False

AND

Road Character = Curve

AND

SafetyEdge - Treatments

The following treatments are associated with the SafetyEdge Countermeasure:

Install Safety Edge Treatment (CMF ID: 9205)

SafetyEdge - Countermeasure Logic

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

Number of Motor Vehicles Involved = 1

AND

Pedestrian Involvement = False

AND

Pedalcycle Involvement = False

AND

Driver Actions = (Any of the following) Going Straight, Changing Lanes, Overtaking or Passing, Negotiating a Curve, Over-Correcting/Over-Steering

AND

Crash Classification ≠ Animal

Wider Edge Lines - Treatments

The following treatments are associated with the Wider Edge Lines Countermeasure:

Install Wider Edgelines (4 In To 6 In) (CMF ID: 4737)

Wider Edge Lines - Countermeasure Logic

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

Number of Motor Vehicles Involved = 1

AND

Pedestrian Involvement = False

AND

Pedalcycle Involvement = False

AND

Driver Actions = (Any of the following) Going Straight, Changing Lanes, Overtaking or Passing, Negotiating a Curve, Over-Correcting/Over-Steering

Intersections

Backplates with Retroreflective Borders - Treatments

The following treatments are associated with the Backplates with Retroreflective Borders Countermeasure:

Add 3-Inch Yellow Retroreflective Sheeting To Signal Backplates (CMF ID: 1410)

Backplates with Retroreflective Borders - Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Backplates with Retroreflective Borders Countermeasure:

Intersection Involvement = True

AND

Traffic Control Device = Traffic Signals

AND

Contributing Factors = Disregarded Traffic Signal

Corridor Access Management - Treatments

The following treatments are associated with the Corridor Access Management Countermeasure:

Reduce Driveways From 10-24 To Less Than 10 Per Mile (CMF ID: 179)
Reduce Driveways From 26-48 To 10-24 Per Mile (CMF ID: 178)

Corridor Access Management -Countermeasure Logic

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

Intersection Involvement = True

AND

Pedestrian Involvement = False

AND

Pedalcycle Involvement = False

AND

First Harmful Event - Manner of Impact = (Any of the following) Front-to-Front, Front-to-Rear, Front-to-Side

AND

First Harmful Event = MV in Transport

Dedicated Right- Lanes at Intersections - Treatments

The following treatments are associated with the Dedicated Right- Lanes at Intersections Countermeasure

Provide A Right-Turn Lane On One Major-Road Approach (CMF ID: 285)

Dedicated Right- Lanes at Intersections - Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Dedicated Right- Lanes at Intersections Countermeasure:

Intersection Type = (Any of the following) Four-Way, T-Intersection, Five-Point or More, Roundabout

AND

Number of Motor Vehicles Involved ≥ 2

AND

First Harmful Event - Manner of Impact = (Any of the following) Front-to-Side, Front-to-Rear, Front-to-Front, Sideswipe

AND

Driver Actions = (Any of the following) Right Turn

Dedicated Left- Lanes at Intersections - Treatments

The following treatments are associated with the Dedicated Left- Lanes at Intersections Countermeasure:

Provide A Left-Turn Lane On One Major-Road Approach (CMF ID: 260)
Improve Left-Turn Lane Offset To Create Positive Offset (CMF ID: 6096)

Dedicated Left- Lanes at Intersections -Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Dedicated Left- Lanes at Intersections Countermeasure:

Intersection Type = (Any of the following) Four-Way, T-Intersection, Five-Point or More, Roundabout

AND

Number of Motor Vehicles Involved ≥ 2

AND

First Harmful Event - Manner of Impact = (Any of the following) Front-to-Side, Front-to-Rear, Front-to-Front, Sideswipe

AND

Driver Actions = (Any of the following) Left Turn

Reduced Left-Turn Conflict Intersections - Treatments

The following treatments are associated with the Reduced Left-Turn Conflict Intersections Countermeasure:

Install J-Turn Intersection (CMF ID: 5556)
Convert A Conventional Signalized Intersection To A Signalized Superstreet (CMF ID: 9985)
Convert Intersection To Median U-Turn (Mut) Intersection (CMF ID: 10867)

Reduced Left-Turn Conflict Intersections - Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Reduced Left-Turn Conflict Intersections Countermeasure:

Intersection Involvement = True

AND

Traffic Control Device = No Controls

Roundabouts - Treatments

The following treatments are associated with the Roundabouts Countermeasure:

Conversion Of Stop-Controlled Intersection Into Single-Lane Roundabout (CMF ID: 211)
Convert Signalized Intersection To Modern Roundabout (CMF ID: 226)

Roundabouts - Countermeasure Logic

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

Intersection Type = (Any of the following) Four-Way, T-Intersection, Five-Point or More, Roundabout

AND

Number of Motor Vehicles Involved ≥ 2

AND

First Harmful Event - Manner of Impact = (Any of the following)Front-to-Side, Front-to-Front

AND

First Harmful Event - Manner of Crash = (Any of the following) From Opposite Direction, Intersecting Path (T-bone)

Systemic Application of Multiple Low-Cost Countermeasures at Stop-Controlled Intersections - Treatments

The following treatments are associated with the Systemic Application of Multiple Low-Cost Countermeasures at Stop-Controlled Intersections Countermeasure:

Implement Systemic Signing And Marking Improvements At Stop-Controlled Intersections (CMF ID: 8867)

Systemic Application of Multiple Low-Cost Countermeasures at Stop-Controlled Intersections - Countermeasure Logic

The following logic is used to determine if crashes would be potentially mitigated by the Systemic Application of Multiple Low-Cost Countermeasures at Stop-Controlled Intersections Countermeasure:

Intersection Involvement = True

AND

Traffic Control Device ≠ Traffic Signals

Yellow Change Intervals - Treatments

The following treatments are associated with the Yellow Change Intervals Countermeasure:

Modify Change Plus Clearance Interval To Ite 1985 Proposed Recommended Practice (CMF ID: 380)

Yellow Change Intervals - Countermeasure Logic

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

Intersection Involvement = True

AND

Traffic Control Device = Traffic Signals

AND

Contributing Factors = Disregard Traffic Signal

Crosscutting

Lighting - Treatments

The following treatments are associated with the Lighting Countermeasure:

Provide Intersection Illumination (CMF ID: 436)
Provide Highway Lighting (CMF ID: 192)

Lighting - Countermeasure Logic

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

Lighting = (Any of the following) Dark-Not Lighted, Dusk, Dawn

AND

Driver Actions ≠ Backing, Stopped in Traffic, Stopped for Traffic

AND

First Harmful Event - Manner of Impact ≠ Front-to-Rear

Pavement Friction Management - Treatments

The following treatments are associated with the Pavement Friction Management Countermeasure:

Install High Friction Surface Treatment (Hfst) (CMF ID: 10342)
Improve Pavement Friction (Increase Skid Resistance) (CMF ID: 2259)

Pavement Friction Management - Countermeasure Logic

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

Driver Actions = Negotiating a Curve

AND

Weather 1 = (Any of the following) Raining, Snowing, Blowing Snow, Sleet or Hail, Freezing Rain or Freezing Drizzle