CMF / CRF Details
CMF ID: 9522
Change driveway type
Description: Change driveway classification type
Prior Condition: Residential driveway on 5-lane urban roadway with TWLTL
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) | |
|---|---|
| Value: | 14.295 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | -1329.5 (This value indicates an increase in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | |
| Applicability | |
|---|---|
| Crash Type: | Angle,Fixed object,Left turn,Rear end,Vehicle/bicycle,Vehicle/pedestrian |
| Crash Severity: | O (property damage only) |
| Roadway Types: | Not specified |
| Street Type: | |
| Minimum Number of Lanes: | 5 |
| Maximum Number of Lanes: | 5 |
| Number of Lanes Direction: | |
| Number of Lanes Comment: | |
| Crash Weather: | Not specified |
| Road Division Type: | Divided by TWLTL |
| 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 | |
|---|---|
| Date Range of Data Used: | 2005 to 2009 |
| Municipality: | |
| State: | IL |
| Country: | United States |
| Type of Methodology Used: | Regression cross-section |
| Other Details | |
|---|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Oct 27, 2018 |
| Comments: | This CMF applies to the change from residential driveway to commercial driveway with drive-through. |
