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City of Charlotte, NC
City of Charlotte, NC - Treatment and Countermeasure Logic
City of Charlotte, NC - Treatment and Countermeasure Logic
Greg Olsen avatar
Written by Greg Olsen
Updated over a week ago

Install Traffic Signal

Intersection Related = TRUE

AND

Signal ID = null
AND

Crash Type = Angle

OR

Crash Type = Left turn-different roadways

OR

Crash Type = Left Turn Same Roadway

OR

Crash Type = Right Turn Different Roadway

OR

Crash Type = Head on

OR

Crash Type = Pedestrian or Pedalcyclist

Left Turn Signal

Intersection Related = True

AND

Signal ID = not null

AND

Crash Type = Left turn-same roadway

OR

Crash Type = Pedestrian

OR

Crash Type = Pedalcyclist

Near Side Head or Primary Head

Intersection Related = True

AND

Signal ID ≠ null
AND

Crash Type = Angle

Pedestrian & Bicycle

Pedestrian Related = True

OR

Bicycle Related = True

Provide Positive Offset for Left Turn Lanes

Intersection Related = True

AND

Crash Type = Left turn-same roadway

Roundabout

Intersection Related = True

AND

Crash Type = Angle
OR

Crash Type = Left turn-different roadways

OR

Crash Type = Head on

AND

Signal ID = null

Reduced Conflict Intersection

Intersection Related = True

AND

Signal ID ≠ null

AND

Crash Type = Angle
OR

Crash Type = Left turn-different roadways

OR

Crash Type = Head on

Install Left Turn Lane at Intersection

Intersection Related = True

AND

Signal ID ≠ null

OR

Traffic Control = Stop Sign

AND

Crash Type = Left turn-same roadway

OR

Crash Type = Rear End

4 Lane to 3 Lane Conversion with TWLTL

Crash Type = Rear end-slow or stop

OR

Crash Type = Rear end-turn

OR

Crash Type = Left turn-same roadway

OR

Crash Type = Left turn-different roadways
OR

Crash Type = Head On

AND

Number of Lanes > 4

AND

Number of Lanes > 5

Rumble Strips / Stripes

Crash Type = Ran off road right

OR

Crash Type = Ran off road left
OR

Crash Type = Head On

OR

Crash Type = Sideswipe opposite direction

High Friction - Spot Treatments

Road Condition = Wet

OR

Road Condition = Water (standing, moving)

OR

Road Condition = Ice

OR

Road Condition = Snow

OR

Road Condition = Slush
AND

Crash Type ≠ Rear End

Install Right Turn Lane at an Intersection

Intersection Related = True

AND

Crash Type = Rear end-slow or stop

OR

Crash Type = Rear end-turn

OR

Crash Type = Sideswipe-same direction

OR

Crash Type = Sideswipe, opposite direction

OR

Crash Type = Right turn different roadway

Pavement Widening

Crash Type = Ran off road right

OR

Crash Type = Ran off road left
OR

Crash Type = Head On

OR

Crash Type = Sideswipe, opposite direction

Improve Sight Distance Triangles

Crash Type = Angle

OR

Crash Type = Left turn-same roadway

OR

Crash Type = Left turn-different roadways

Signage

Unit Contributing 1, 2, or 3 = Failure to reduce speed

OR

Unit Contributing 1, 2, or 3 = Exceeded safe speed for conditions

OR

Unit Contributing 1, 2, or 3 = Exceeded authorized speed limit

AND

Crash Type = Ran off road right

OR

Crash Type = Ran off road left

OR

Crash Type = Sideswipe-same direction

OR

Crash Type = Sideswipe, opposite direction

OR

Crash Type = Head on

Pavement Markings

Unit Contributing 1, 2, or 3 = Failure to reduce speed

OR

Unit Contributing 1, 2, or 3 = Exceeded safe speed for conditions

OR

Unit Contributing 1, 2, or 3 = Exceeded authorized speed limit

AND

Crash Type = Ran off road right

OR

Crash Type = Ran off road left

OR

Crash Type = Sideswipe-same direction

OR

Crash Type = Sideswipe, opposite direction

OR

Crash Type = Head on

Lighting

Lighting = Dark - roadway not lighted

AND

Signal ID = null

Publicized Sobriety Checkpoints

Alcohol Involved = True

High Visibility Saturation Patrol - Impairment

Alcohol Involved = True

Youth Programs - Impairment

Crash contains at least one driver that meets the following criteria:

Party Hazardous Action = Alcohol use

AND

Driver Age = 16

OR

Driver Age = 17

OR

Driver Age = 18

OR

Driver Age = 19

OR

Driver Age = 20

Enforcement of Drug Impaired Driving

If any Unit Contributing Factor = Drug Use

Short Term, High Visibility Seat Belt Law Enforcement

Restraint Use = Non Used

Short Term, High Visibility Child Restraint/Booster Law Enforcement

Crash contains at least one party that meets this criteria:

Age < 8

AND

Restraint Use = NOT Child Restraint

High Visibility Speed Enforcement

Unit Contributing Factor 1, 2, or 3 = Failure to reduce speed

OR

Unit Contributing Factor 1, 2, or 3 = Exceeded safe speed for conditions

OR

Unit Contributing Factor 1, 2, or 3 = Exceeded authorized speed limit

High Visibility Cell Phone and Distracted Driving Enforcement

If any Unit Contributing Factor contains “Driver Distracted”

Enforcement of GDL and Zero-Tolerance Laws

Hours of Crash is between 11:00 PM and 5:00 AM

Law Enforcement Roles - Older Drivers

At least one driver aged ≥ 65

Impaired Pedestrian Patrol

Unit = Pedestrian

AND

Any Unit Contributing Factor = Drug Use

OR

Any Unit Contributing Factor = Alcohol Use

Pedestrian Enforcement Strategies

Pedestrian Involved = True

Bicycle Enforcement Strategies

Bicycle Involved = True

Retroreflective Backplates

Intersection Related = True

AND

Crash Type = Angle

AND

Signal ID ≠ null

Pedestrian & Bicycle - Unsignalized Locations

Pedestrian Related = True

OR

Bicycle Related = True

AND

Signal ID = Null

AND

Intersection Related = False

Pedestrian & Bicycle - Signalized Locations

Pedestrian Related = True

OR

Bicycle Related = True

AND

Signal ID ≠ null

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