CMF / CRF Details
CMF ID: 4956
Removing mainline barrier toll plazas on highways
Description: The original toll plaza is retrofitted to add two express ETC lanes in each direction. Its remaining barrier toll booths are removed and the toll plaza becomes a standard roadway section without any toll collection.
Prior Condition: 11 mainline toll plazas existed on the Gardens State Parkway (GSP) in New Jersey.
Category: Roadway
Study: Effect of Removing Freeway Mainline Barrier Toll Plazas on Safety, Yang et al., 2013
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 80 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 0.528 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.016 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | 47.2 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 1.6 |
| Applicability | |
|---|---|
| Crash Type: | All |
| Crash Severity: | All |
| Roadway Types: | Principal Arterial Other Freeways and Expressways |
| Street Type: | |
| Minimum Number of Lanes: | 2 |
| Maximum Number of Lanes: | 7 |
| Number of Lanes Direction: | |
| Number of Lanes Comment: | |
| Crash Weather: | Not specified |
| Road Division Type: | Divided by Median |
| Minimum Speed Limit: | |
| Maximum Speed Limit: | |
| Speed Unit: | |
| Speed Limit Comment: | |
| Area Type: | Not specified |
| Traffic Volume: | |
| Average Traffic Volume: | |
| Time of Day: | Not specified |
| 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: | 2001 to 2010 |
| Municipality: | |
| State: | NJ |
| Country: | USA |
| Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
| Sample Size (crashes): | 2015 crashes before, 1743 crashes after |
| Other Details | |
|---|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Aug 01, 2013 |
| Comments: | - Study did not report AADT volumes. |
