CMF / CRF Details
CMF ID: 9044
Raise posted speed
Description:
Prior Condition: No Prior Condition(s)
Category: Speed management
Study: Evaluating the safety impact of increased speed limits on rural highways in British Columbia, Tarek Sayed, Emanuele Sacchi, 2016
Star Quality Rating: | [View score details] |
Rating Points Total: | 130 |
Crash Modification Factor (CMF) | |
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Value: | 1.111 |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 0.009 |
Crash Reduction Factor (CRF) | |
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Value: | -11.1 (This value indicates an increase in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 0.9 |
Applicability | |
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Crash Type: | All |
Crash Severity: | K (fatal),A (serious injury),B (minor injury),C (possible injury) |
Roadway Types: | Principal Arterial Other |
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: | All |
Minimum Speed Limit: | |
Maximum Speed Limit: | |
Speed Unit: | |
Speed Limit Comment: | |
Area Type: | Rural |
Traffic Volume: | |
Average Traffic Volume: | 11246 Annual Average Daily Traffic (AADT) |
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 | |
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Date Range of Data Used: | 2012 to 2015 |
Municipality: | |
State: | |
Country: | Canada |
Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
Sample Size (crashes): | 1212 crashes before, 848 crashes after |
Sample Size (miles): | 812 miles before, 812 miles after |
Sample Size (miles): | 1897 mile-years before, 1083 mile-years after |