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.

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

Speed Related = True

OR

Contributing Factor = any of: Failed To Control Speed, Unsafe Speed, Speeding - (Overlimit)

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

Speed Related = True

OR

Contributing Factor = any of: Failed To Control Speed, Unsafe Speed, Speeding - (Overlimit)

AND

Number of Lanes is equal to or greater than 6

Treatments

Countermeasure Logic

The following treatments are associated with the Variable Speed Limits Countermeasure:

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

Speed Related = True

OR

Contributing Factor = any of: Failed To Control Speed, Unsafe Speed, Speeding - (Overlimit)

AND

Functional System = any of: Interstate, Other Freeway And Expressway, Other Principal Arterial

Treatments

Countermeasure Logic

The following treatments are associated with the Bicycle Lanes Countermeasure:

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

Pedalcyclist Related = True

AND

Pedalcyclist Action = "Riding In Roadway (Vehicle Lane Without Bike Markings) - With Traffic", "Riding In Roadway (Vehicle Lane - Unknown If Bike Markings Present) - With Traffic", "Riding In Shoulder - With Traffic", "Riding In Roadway (Vehicle Lane Without Bike Markings) - Against Traffic"

Treatments

Countermeasure Logic

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

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

Pedestrian Related = True

AND

Intersection ID is not blank

AND

Pedestrian Action = "Crossing Road Not At Intersection Or Crosswalk (Marked Or Unmarked)", "Crossing Road At Intersection Or Crosswalk (Marked Or Unmarked)", "Crossing Driveway Or Alley"

Treatments

Countermeasure Logic

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

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

Intersection ID is not blank

AND

Traffic Control = "Signal Light", "Signal Light With Red Light Running Camera"

AND

Pedestrian Related = True

Treatments

Countermeasure Logic

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

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

Intersection ID is not blank

AND

Traffic Control = "Signal Light", "Signal Light With Red Light Running Camera"

AND

Pedestrian Related = True

Treatments

Countermeasure Logic

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

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

Pedestrian Related = True

AND

Intersection ID is blank

AND

Pedestrian Action = "Walking In Roadway - Against Traffic", "Walking In Roadway - With Traffic", "Walking In Shoulder - With Traffic", "Walking In Shoulder - Against Traffic"

Treatments

Countermeasure Logic

The following treatments are associated with the Pedestrian Hybrid Beacons Countermeasure:

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

Pedestrian Related = True

AND

Speed Limit > 35

AND

Number of Lanes ≥ 3

Treatments

Countermeasure Logic

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

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

Pedestrian Related = True

AND

Intersection ID is blank

AND

Pedestrian Action = "Crossing Road Not At Intersection Or Crosswalk (Marked Or Unmarked)", "Walking In Roadway - With Traffic", "Walking In Roadway - Against Traffic"

Treatments

Countermeasure Logic

The following treatments are associated with the Road Diets Countermeasure:

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

First Harmful Event = Pedalcyclist

AND

Functional System ≠ "Interstate", "Other Freeway And Expressway"

AND

Number of Lanes = 4

AND

Rural/Urban = "Urbanized (50,000-199,999)", "Large Urbanized (200,000+)", "Small Urban (5000-49,999)"

AND

Manner of Collision = "Opposite Direction - One Straight-One Left Turn", "Same Direction - Both Going Straight-Rear End", "Opposite Direction - Both Going Straight"

AND

Roadbed Width ≥ 35

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

Pedestrian Action = Walking In Roadway - With Traffic, Walking In Shoulder - With Traffic, Walking In Shoulder - Against Traffic, Walking In Median

Treatments

Countermeasure Logic

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

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

Intersection ID is blank

AND

Roadway Alignment = Curve, Level; Curve, Grade; Curve, Hillcrest

AND

Single Vehicle -Run off the Road = True

Treatments

Countermeasure Logic

The following treatments are associated with the Longitudinal Rumble Strips and Stripes Countermeasure:

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

Intersection ID is blank

AND

Manner of Collision = One Motor Vehicle - Going

AND

Single Vehicle - Run off the Road = True

AND

Speed Limit ≥ 55

Treatments

Countermeasure Logic

The following treatments are associated with the Median Barriers Countermeasure:

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

At Intersection = False

AND

Manner of Collision = "Opposite Direction - Both Going Straight", "Opposite Direction - One Straight-One Left Turn"

AND

Roadway Type = "4 Or More Lanes, Undivided", 2 Lane, 2 Way"

AND

Median Type ≠ "Positive Barrier Rigid", "Positive Barrier Flexible", "Positive Barrier Semi-Rigid"

Treatments

Countermeasure Logic

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

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

Intersection ID is blank

AND

Roadway Alignment = "Curve, Level", "Curve, Grade", "Curve, Hillcrest"

AND

First Harmful Event = "Fixed Object", "Other Object"

Treatments

Countermeasure Logic

The following treatments are associated with the Safety Edge Countermeasure:

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

Intersection ID is blank

AND

Roadway Alignment = "Curve, Level", "Curve, Grade", "Curve, Hillcrest"

AND

First Harmful Event = "Fixed Object", "Other Object"

Treatments

Countermeasure Logic

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

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

IF

Number of Vehicles = 1 (need to create this field)

AND

Pedestrian Related = False

AND

Pedalcyclist Related = False

AND

Contributing Factors = Failed To Pass To Right Safely, Passed On Shoulder

OR

Single Vehicle -Run off the Road = True

OR

Roadway Alignment = Curve, Level; Curve, Grade; Curve, Hillcrest

AND

First Harmful Event ≠ Anima

Treatments

Countermeasure Logic

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

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

Intersection ID is not blank

AND

Traffic Control = Signal Light, Signal Light With Red Light Running Camera,

AND

Contributing Factors = Disregard Stop Sign Or Light

Treatments

Countermeasure Logic

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

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

IF

Intersection Related = Driveway Access

AND

Pedestrian Related = False

AND

Pedalcyclist Related = False

AND

Manner of Collision = Angle - Both Going Straight, Angle - One Straight-One Left Turn, Angle - One Straight-One Right Turn, Angle - One Left Turn-One Stopped, Angle - One Right Turn-One Stopped, Angle - One Straight-One Stopped, Angle - Both Left Turn, Angle - One Right Turn-One Left Turn, Angle - Both Right Turn, Opposite Direction - Both Going Straight, Same Direction - Both Going Straight-Rear End

Treatments

Countermeasure Logic

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

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

IF

Number of Vehicles Involved ≥ 2 (need to create this field)

AND

Intersection ID is not blank

AND

Manner of Collision = Same Direction - One Straight-One Right Turn"

Treatments

Countermeasure Logic

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

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

Intersection ID is not blank

AND

Manner of Collision" does not equal "One motor vehicle -going"

AND

Manner of Collision = Any of the following "Angle - Both Going Straight", "Angle - Both Left Turn", "Angle - One Left Turn-One Stopped", "Angle - One Right Turn-One Left Turn", "Angle - One Straight-One Left Turn"

Treatments

Countermeasure Logic

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

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

Intersection ID is not blank

AND

Manner of Collision = Any of the following "Angle - Both Going Straight", "Angle - Both Left Turn", "Angle - One Left Turn-One Stopped", "Angle - One Right Turn-One Left Turn", "Angle - One Straight-One Left Turn"

AND

Traffic Control: does not equal "Signal Light"

Treatments

Countermeasure Logic

The following treatments are associated with the Roundabouts Countermeasure:

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

Intersection ID is not blank

AND

Entering Roads ≠ Traffic Circle

AND

Manner of Collision" does not equal "One motor vehicle -going"

AND

Manner of Collision: contains "Angle"

AND

Manner of Collision: does not contain "same direction"

Treatments

Countermeasure Logic

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

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 ID is not blank

AND

Traffic Control = Stop Sign

AND

Contributing Factors = Disregard Stop Sign Or Light

Treatments

Countermeasure Logic

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

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 ID is not blank

AND

Contributing Factor = Disregard Stop Sign Or Light

AND

Traffic Control = Signal Light

Treatments

Countermeasure Logic

The following treatments are associated with the Lighting Countermeasure:

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

Lighting Conditions = Dark, Not Lighted ; Dusk ; Dawn ; Dark

Treatments

Countermeasure Logic

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

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

Single Vehicle - Run off the Road = True

AND

Surface Condition = Wet ; Snow ; Ice ; Slush ; Standing Water

AND

Roadway Alignment = Curve, Level ; Curve, Grade ; Curve, Hillcrest