CMF / CRF Details
CMF ID: 5413
Convert lane width from 12 ft to 11 ft, with a total shoulder of X ft
Description: The cmf is for a combination of lane width and shoulder width. The total shoulder width includes paved and unpaved shoulder width and X is in ft
Prior Condition: 12 ft lane width with 6 ft shoulder width
Category: Roadway
Study: Safety Effects of Cross Section Design on Urban and Suburban Roads, Le and Porter, 2012
Star Quality Rating: | [View score details] |
Rating Points Total: | 85 |
Crash Modification Factor (CMF) | |
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Value: | |
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Unadjusted Standard Error: |
Crash Reduction Factor (CRF) | |
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Unadjusted Standard Error: |
Applicability | |
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Crash Type: | All |
Crash Severity: | K (fatal),A (serious injury),B (minor injury),C (possible injury) |
Roadway Types: | Not specified |
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: | Urban and suburban |
Traffic Volume: | Minimum of 1183 to Maximum of 47067 Annual Average Daily Traffic (AADT) |
Average Traffic Volume: | 11317 Annual Average Daily Traffic (AADT) |
Time of Day: | All |
If countermeasure is intersection-based | |
Intersection Type: | |
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Traffic Control: | |
Major Road Traffic Volume: | |
Minor Road Traffic Volume: | |
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Average Minor Road Volume : |
Development Details | |
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Date Range of Data Used: | 2007 to 2009 |
Municipality: | |
State: | IL |
Country: | USA |
Type of Methodology Used: | Regression cross-section |
Sample Size (crashes): | 2004 crashes |
Other Details | |
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Included in Highway Safety Manual? | No |
Date Added to Clearinghouse: | Jan 09, 2014 |
Comments: | The function includes an interaction between lane width and shoulder width |