CMF / CRF Details
CMF ID: 3924
Lower posted speed from 80 km/h to 60 km/h
Description: Lower speed from 80 km/h to 60 km/h
Prior Condition: Minor rural road speed limit of 80 km/h
Category: Speed management
Study: Making minor rural road networks safer: The effects of 60 km/h-zones, Jaarsma et al., 2011
Star Quality Rating: | [View score details] |
Rating Points Total: | 65 |
Crash Modification Factor (CMF) | |
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Value: | 0.76 |
Adjusted Standard Error: | |
Unadjusted Standard Error: |
Crash Reduction Factor (CRF) | |
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Value: | 24 (This value indicates a decrease in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: |
Applicability | |
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Crash Type: | All |
Crash Severity: | K (fatal) |
Roadway Types: | Minor Collector |
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: | |
Time of Day: | Not specified |
If countermeasure is intersection-based | |
Intersection Type: | Roadway/roadway (not interchange related) |
Intersection Geometry: | Not specified |
Traffic Control: | Not specified |
Major Road Traffic Volume: | Minimum of 146 to Maximum of 4512 Annual Average Daily Traffic (AADT) |
Minor Road Traffic Volume: | |
Average Major Road Volume : | 752 Annual Average Daily Traffic (AADT) |
Average Minor Road Volume : |
Development Details | |
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Date Range of Data Used: | 1992 to 2003 |
Municipality: | |
State: | notusa |
Country: | Netherlands |
Type of Methodology Used: | Simple before/after |
Sample Size (crashes): | 481 crashes before, 217 crashes after |