CMF / CRF Details
CMF ID: 4179
Lower posted speed from 90 km/h to 70 km/h
Description: Lower speed limit
Prior Condition: Speed limit of 90 km/h
Category: Speed management
Study: Safety Effects of Restricting the Speed Limit from 90 to 70 km/h, De Pauw et al., 2012
Star Quality Rating: | [View score details] |
Rating Points Total: | 115 |
Crash Modification Factor (CMF) | |
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Value: | 0.67 |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 0.079 |
Crash Reduction Factor (CRF) | |
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Value: | 33 (This value indicates a decrease in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 7.9 |
Applicability | |
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Crash Type: | All |
Crash Severity: | K (fatal),A (serious injury) |
Roadway Types: | All |
Street Type: | |
Minimum Number of Lanes: | 2 |
Maximum Number of Lanes: | 3 |
Number of Lanes Direction: | |
Number of Lanes Comment: | |
Crash Weather: | Not specified |
Road Division Type: | |
Minimum Speed Limit: | 70 |
Maximum Speed Limit: | 70 |
Speed Unit: | km/h |
Speed Limit Comment: | |
Area Type: | Urban |
Traffic Volume: | |
Average Traffic Volume: | |
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: | 1996 to 2007 |
Municipality: | |
State: | notusa |
Country: | Belgium |
Type of Methodology Used: | Meta-analysis |