CMF / CRF Details

CMF ID: 3071

Presence of right turning lane on arterial with signal coordination


Prior Condition: No Prior Condition(s)

Category: Intersection geometry

Study: Safety Effect of Arterial Signal Coordination, Wei and Tarko, 2011

Star Quality Rating: 3 Stars   [View score details]
Rating Points Total: 80
Crash Modification Factor (CMF)
Value: 0.06
Adjusted Standard Error:
Unadjusted Standard Error: 0.02
Crash Reduction Factor (CRF)
Value: 93.6   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 2.1
Crash Type: Rear end
Crash Severity: All
Roadway Types: All
Number of Lanes: 1 to 3
Road Division Type:
Speed Limit: 30-50 mph
Area Type: Urban and suburban
Traffic Volume:
Average Traffic Volume:
Time of Day: All
If countermeasure is intersection-based
Intersection Type: Roadway/roadway (not interchange related)
Intersection Geometry:
Traffic Control: Signalized
Major Road Traffic Volume: Maximum of 1840 Vehicles Per Hour
Minor Road Traffic Volume:
Average Major Road Volume :
Average Minor Road Volume :
Development Details
Date Range of Data Used: 2003 to 2006
State: IN
Country: USA
Type of Methodology Used: 7
Sample Size (crashes): 324 crashes
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Jul-15-2011
Comments: The volume is entered as vehicles per hour per lane