CMF / CRF Details
CMF ID: 1250
Raise posted speed
Description:
Prior Condition: No Prior Condition(s)
Category: Speed management
Study: Effects of Raising and Lowering Speed Limits on Selected Roadway Sections, Parker, 1997
Star Quality Rating: | [View score details] |
Rating Points Total: | 50 |
Crash Modification Factor (CMF) | |
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Value: | 0.9 |
Adjusted Standard Error: | |
Unadjusted Standard Error: |
Crash Reduction Factor (CRF) | |
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Value: | 10 (This value indicates a decrease in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: |
Applicability | |
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Crash Type: | All |
Crash Severity: | All |
Roadway Types: | All |
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: | All |
Traffic Volume: | |
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: | 1985 to 1992 |
Municipality: | |
State: | AZ,CA,CO,CT,DE,ID,IL,IN,ME,MD,MA,MI,MS,NE,NJ,NM,OH,OK,TN,TX,VA,WV |
Country: | |
Type of Methodology Used: | Simple before/after |
Sample Size (crashes): | 1169 crashes before, 683 crashes after |
Other Details | |
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Included in Highway Safety Manual? | No |
Date Added to Clearinghouse: | Dec 01, 2009 |
Comments: |