CMF / CRF Details

CMF ID: 4787

Install wider markings and shoulder rumble strips with resurfacing

Description: Resurface roadway to improve rideability and install wider pavement markings (increase from 4 inch to 6 inch) and shoulder rumble strips.

Prior Condition: No Prior Condition(s)

Category: Delineation

Study: Benefit/Cost Evaluation of MoDOT's Total Striping and Delineation Program: Phase II, Potts et al., 2011

 
Star Quality Rating: 4 Stars   [View score details]
Rating Points Total: 110
Crash Modification Factor (CMF)
Value: 0.75
Adjusted Standard Error:
Unadjusted Standard Error: 0.123
Crash Reduction Factor (CRF)
Value: 25   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 12.3
Applicability
Crash Type: All
Crash Severity: K (fatal),A (serious injury),B (minor injury),C (possible injury)
Roadway Types: Not specified
Street Type:
Minimum Number of Lanes: 3
Maximum Number of Lanes:
Number of Lanes Direction: Both Directions
Number of Lanes Comment: Multi Lane
Crash Weather: Not specified
Road Division Type: Divided by Median
Minimum Speed Limit:
Maximum Speed Limit:
Speed Unit:
Speed Limit Comment:
Area Type: Rural
Traffic Volume:
Average Traffic Volume: 7500 Average Daily Traffic (ADT)
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: 2002 to 2009
Municipality:
State: MO
Country:
Type of Methodology Used: Before/after using empirical Bayes or full Bayes
Sample Size (crashes): 46 crashes before, 41 crashes after
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: May-01-2013
Comments: