CMF / CRF Details

CMF ID: 4785

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]
Crash Modification Factor (CMF)
Value: 0.8
Adjusted Standard Error:
Unadjusted Standard Error: 0.043
Crash Reduction Factor (CRF)
Value: 20   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 4.3
Applicability
Crash Type: All
Crash Severity: K (fatal),A (serious injury),B (minor injury),C (possible injury)
Roadway Types: Principal Arterial Other Freeways and Expressways
Number of Lanes: multi
Road Division Type: Divided by Median
Speed Limit:
Area Type: Urban
Traffic Volume:
Average Traffic Volume: 22000 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): 502 crashes before, 425 crashes after
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: May-01-2013
Comments: