CMF / CRF Details
CMF ID: 551
No active with no lane closure (compared to no work zone)
Description:
Prior Condition: No Prior Condition(s)
Category: Work zone
Study: Traffic Safety Evaluation of Daytime and Nighttime Work Zones, Ullman et al., 2008
Star Quality Rating: | [View score details] |
Rating Points Total: | 140 |
Crash Modification Factor (CMF) | |
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Value: | 1.11 |
Adjusted Standard Error: | 0.05 |
Unadjusted Standard Error: | 0.04 |
Crash Reduction Factor (CRF) | |
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Value: | -11 (This value indicates an increase in crashes) |
Adjusted Standard Error: | 5 |
Unadjusted Standard Error: | 4 |
Applicability | |
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Crash Type: | Nighttime |
Crash Severity: | A (serious injury),B (minor injury),C (possible injury) |
Roadway Types: | Principal Arterial Other Freeways and Expressways |
Street Type: | |
Minimum Number of Lanes: | |
Maximum Number of Lanes: | |
Number of Lanes Direction: | |
Number of Lanes Comment: | |
Crash Weather: | Not specified |
Road Division Type: | |
Minimum Speed Limit: | |
Maximum Speed Limit: | |
Speed Unit: | |
Speed Limit Comment: | |
Area Type: | Not specified |
Traffic Volume: | Minimum of All to Maximum of All |
Average Traffic Volume: | |
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: | |
Municipality: | |
State: | |
Country: | |
Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
Other Details | |
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Included in Highway Safety Manual? | No |
Date Added to Clearinghouse: | Dec 01, 2009 |
Comments: |