CMF / CRF Details
CMF ID: 9966
Improve pavement condition as measured by International Roughness Index (IRI)
Description:
Prior Condition: Pavement with lower IRI
Category: Roadway
Study: Safety Effects of Pavement Maintenance Treatments for Two-Lane Rural Roads – Insights for Pavement Management, Nemtsov et al., 2019
Star Quality Rating: | Cannot Be Rated (Insufficient Information) |
Rating Points Total: |
Crash Modification Factor (CMF) | |
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Value: | 1.17 |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 0.124 |
Crash Reduction Factor (CRF) | |
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Value: | -17 (This value indicates an increase in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 12.4 |
Applicability | |
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Crash Type: | All |
Crash Severity: | K (fatal),A (serious injury) |
Roadway Types: | All |
Street Type: | |
Minimum Number of Lanes: | 2 |
Maximum Number of Lanes: | 2 |
Number of Lanes Direction: | |
Number of Lanes Comment: | |
Crash Weather: | Not specified |
Road Division Type: | Undivided |
Minimum Speed Limit: | |
Maximum Speed Limit: | |
Speed Unit: | |
Speed Limit Comment: | |
Area Type: | Rural |
Traffic Volume: | Minimum of 500 to Maximum of 27300 Annual Average Daily Traffic (AADT) |
Average Traffic Volume: | 5046 Annual Average Daily Traffic (AADT) |
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 | |
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Date Range of Data Used: | 2000 to 2013 |
Municipality: | Ontario |
State: | notusa |
Country: | Canada |
Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
Sample Size (sites): | 28 sites before, 28 sites after |
Other Details | |
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Included in Highway Safety Manual? | No |
Date Added to Clearinghouse: | Mar 18, 2019 |
Comments: | CMF for arterial with IRI change equal or more than 2 |