CMF / CRF Details
CMF ID: 10211
Change from standard sized lanes to undersized lanes
Description: Convert from standard sized lanes (average lane width between 3.25 meters and 3.75 meters) to undersized lanes (average lane width less than 3.25 meters)
Prior Condition: Average lane width is between 3.25 meters and 3.75 meters
Category: Roadway
Study: Relationship between Lane Width and Safety along Urban Expressways in Shanghai, Wu et al., 2019
Star Quality Rating: | [View score details] |
Rating Points Total: | 75 |
Crash Modification Factor (CMF) | |
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Value: | 3.377 |
Adjusted Standard Error: | |
Unadjusted Standard Error: |
Crash Reduction Factor (CRF) | |
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Value: | -237.7 (This value indicates an increase in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: |
Applicability | |
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Crash Type: | Other |
Crash Severity: | All |
Roadway Types: | Principal Arterial Other Freeways and Expressways |
Street Type: | |
Minimum Number of Lanes: | 4 |
Maximum Number of Lanes: | 8 |
Number of Lanes Direction: | |
Number of Lanes Comment: | |
Crash Weather: | Not specified |
Road Division Type: | Divided by Median |
Minimum Speed Limit: | 80 |
Maximum Speed Limit: | 80 |
Speed Unit: | km/h |
Speed Limit Comment: | |
Area Type: | Urban |
Traffic Volume: | Minimum of 42785 to Maximum of 120001 Average Daily Traffic (ADT) |
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: | 2010 to 2013 |
Municipality: | Shanghai |
State: | notusa |
Country: | China |
Type of Methodology Used: | Regression cross-section |