CMF / CRF Details
CMF ID: 10267
Provide short 2+1 road sections
Description:
Prior Condition: Two-lane road sections
Category: Roadway
Study: Comparison of Bayesian Techniques for the Before–After Evaluation of the Safety Effectiveness of Short 2+1 Road Sections, D'Agostino, C., S. Cafiso, and M. Kiec., 2019
Star Quality Rating: | [View score details] |
Rating Points Total: | 120 |
Crash Modification Factor (CMF) | |
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Value: | 0.53 |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 0.127 |
Crash Reduction Factor (CRF) | |
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Value: | 47 (This value indicates a decrease in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 12.7 |
Applicability | |
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Crash Type: | All |
Crash Severity: | All |
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 5234 to Maximum of 18405 Annual Average Daily Traffic (AADT) |
Average Traffic Volume: | 12052 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: | 2005 to 2013 |
Municipality: | |
State: | notusa |
Country: | Poland |
Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
Sample Size (crashes): | 37 crashes before, 27 crashes after |
Sample Size (sites): | 16 sites before, 16 sites after |
Sample Size (miles): | 8.02 miles before, 8.02 miles after |
Other Details | |
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Included in Highway Safety Manual? | No |
Date Added to Clearinghouse: | Dec 07, 2019 |
Comments: | EB CMFs from Table 6 using advanced model form are reported in the Clearinghouse. |