CMF / CRF Details
CMF ID: 9434
Change driveway type
Description: Change driveway classification type
Prior Condition: Industrial/Institutional driveway on 2-lane undivided urban roadway
Category: Access management
Study: Safety Effects of Different Driveway Types Defined in Highway Safety Manual, Williamson et al., 2018
Star Quality Rating: | [View score details] |
Rating Points Total: | 40 |
Crash Modification Factor (CMF) | |
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Value: | 2.194 |
Adjusted Standard Error: | |
Unadjusted Standard Error: |
Crash Reduction Factor (CRF) | |
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Value: | -119.4 (This value indicates an increase in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: |
Applicability | |
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Crash Type: | Angle,Fixed object,Left turn,Rear end,Vehicle/bicycle,Vehicle/pedestrian |
Crash Severity: | All |
Roadway Types: | Not specified |
Street Type: | |
Minimum Number of Lanes: | 2 |
Maximum Number of Lanes: | 2 |
Number of Lanes Direction: | |
Number of Lanes Comment: | |
Crash Weather: | Not specified |
Road Division Type: | Undivided |
Minimum Speed Limit: | 35 |
Maximum Speed Limit: | 40 |
Speed Unit: | mph |
Speed Limit Comment: | |
Area Type: | Urban and suburban |
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: | 2005 to 2009 |
Municipality: | |
State: | IL |
Country: | United States |
Type of Methodology Used: | Regression cross-section |
Other Details | |
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Included in Highway Safety Manual? | No |
Date Added to Clearinghouse: | Oct 27, 2018 |
Comments: | This CMF applies to the change from industrial/institutional driveway to commercial driveway. |