CMF / CRF Details

CMF ID: 11755

Implement automated speed enforcement cameras

Description:

Prior Condition:  Most similar roadways with no speed camera

Category: Advanced technology and ITS

Study: Evaluating the Effectiveness of Urban Speed Cameras on Traffic Safety in a Period of Dramatic Change, Guerra, 2024

 
Star Quality Rating:3 Stars  [View score details]
Rating Points Total:90
Crash Modification Factor (CMF)
Value:0.58
Adjusted Standard Error:
Unadjusted Standard Error:
Crash Reduction Factor (CRF)
Value:42  (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:
Applicability
Crash Type:All
Crash Severity:A (serious injury), B (minor injury), C (possible injury)
Roadway Types:Principal Arterial Other
Street Type:Not Specified
Minimum Number of Lanes:
Maximum Number of Lanes:
Number of Lanes Direction:
Number of Lanes Comment:
Crash Weather:
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:
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:2018 to 2022
Municipality:Philadelphia
State:PA
Country:USA
Type of Methodology Used:
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:May 07, 2025
Comments:This CMF was developed from a small number of study sites located on one single corridor in Philadelphia so please take this into consideration and use it with caution. The study reported more parameters that could be interpreted by users for other scenarios.