CMF / CRF Details

CMF ID: 10823

Install adaptive traffic signal control

Description: ATSC is a traffic management strategy in which traffic signal timings change, or adapt, based on observed traffic demand. These systems utilize increased detection to continually collect data on observed demand, and signal timings are then re-optimized based on current data.

Prior Condition:  Signalized intersection

Category: Intersection traffic control

Study: Developing Crash Modification Factors for Adaptive Signal Control Technologies, Avelar et al., 2021

Star Quality Rating:3 Stars  [View score details]
Rating Points Total:75
Crash Modification Factor (CMF)
Adjusted Standard Error:
Unadjusted Standard Error:
Crash Reduction Factor (CRF)
Value:-1.9  (This value indicates an increase in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:
Crash Type:All
Crash Severity:O (property damage only)
Roadway Types:Not specified
Street Type:
Minimum Number of Lanes:2
Maximum Number of Lanes:7
Number of Lanes Direction:
Number of Lanes Comment:
Crash Weather:Not specified
Road Division Type:
Minimum Speed Limit:
Maximum Speed Limit:
Speed Unit:
Speed Limit Comment:
Area Type:Urban
Traffic Volume:
Average Traffic Volume:
Time of Day:All
If countermeasure is intersection-based
Intersection Type:Roadway/roadway (not interchange related)
Intersection Geometry:3-leg,4-leg
Traffic Control:Signalized
Major Road Traffic Volume:Minimum of 6140 to Maximum of 52723 Annual Average Daily Traffic (AADT)
Minor Road Traffic Volume:Minimum of 329 to Maximum of 39755 Annual Average Daily Traffic (AADT)
Average Major Road Volume :29300 Annual Average Daily Traffic (AADT)
Average Minor Road Volume :6228 Annual Average Daily Traffic (AADT)
Development Details
Date Range of Data Used:2006 to 2013
Type of Methodology Used:
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Aug 11, 2021
Comments:Applies to crashes at intersection.