CMF / CRF Details

CMF ID: 11030

Install an Adaptive Signal Control Systems (ASCS)

Description: There are three main components in the ASCS: the vehicle detection, local traffic controller(s), and central server.

Prior Condition:  Freeways with non-ASCS alternate routes

Category: Advanced technology and ITS

Study: Assessing the likelihood of secondary crashes on freeways with Adaptive Signal Control System deployed on alternate routes, Salek et al., 2021

Star Quality Rating:2 Stars  [View score details]
Rating Points Total:65
Crash Modification Factor (CMF)
Adjusted Standard Error:
Unadjusted Standard Error:
Crash Reduction Factor (CRF)
Value:47.3  (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:
Crash Type:Other
Crash Severity:All
Roadway Types:Principal Arterial Interstate
Street Type:
Minimum Number of Lanes:
Maximum Number of Lanes:
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:
Traffic Volume:
Average Traffic Volume:149852 Annual Average Daily Traffic (AADT)
Time of Day:All
If countermeasure is intersection-based
Intersection Type:
Intersection Geometry:
Traffic Control:
Major Road Traffic Volume:
Minor Road Traffic Volume:
Average Major Road Volume :
Average Minor Road Volume :
Development Details
Date Range of Data Used:
Type of Methodology Used:
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Mar 16, 2022
Comments:CMF of secondary crashes. The CMF here is for changes in odds ratio.