CMF / CRF Details

CMF ID: 3101

Increase speed limit from X to Y mph

Description: Increase the speed limit from X to Y mph at rural 2-lane intersections.

Prior Condition:  No Prior Condition(s)

Category: Speed management

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:Equation
Adjusted Standard Error:
Unadjusted Standard Error:
Crash Reduction Factor (CRF)
Value:Equation
Adjusted Standard Error:
Unadjusted Standard Error:
Applicability
Crash Type:Rear end
Crash Severity:All
Roadway Types:All
Street Type:
Minimum Number of Lanes:1
Maximum Number of Lanes:3
Number of Lanes Direction:
Number of Lanes Comment:
Crash Weather:Not specified
Road Division Type:
Minimum Speed Limit:30
Maximum Speed Limit:50
Speed Unit:mph
Speed Limit Comment:
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 veh/hr/ln 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
Municipality:
State:IN
Country:USA
Type of Methodology Used:Regression cross-section
Sample Size (crashes):324 crashes
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Jul 15, 2011
Comments: