CMF / CRF Details
Modify signal phasing (implement a leading pedestrian interval)
Countermeasure ID: 1993
Description:
Prior Condition: Signalized intersection with pedestrian signal heads. Avg ped volume per day ranged from about 100 to 1000 peds.
Category: Intersection traffic control
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 110 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 0.413 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.064 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | 58.7 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 6.4 |
| Applicability | |
|---|---|
| Crash Type: | Vehicle/pedestrian |
| Crash Severity: | All |
| Roadway Types: | Principal Arterial Other |
| Street Type: | |
| Minimum Number of Lanes: | 4 |
| Maximum Number of Lanes: | 4 |
| Number of Lanes Direction: | |
| Number of Lanes Comment: | |
| Crash Weather: | Not specified |
| Road Division Type: | |
| Minimum Speed Limit: | 25 |
| Maximum Speed Limit: | 25 |
| Speed Unit: | mph |
| Speed Limit Comment: | |
| Area Type: | Urban |
| Traffic Volume: | |
| Average Traffic Volume: | |
| Time of Day: | All |
| If countermeasure is intersection-based | |
| Intersection Type: | Roadway/roadway (not interchange related) |
| Intersection Geometry: | 3-leg,4-leg |
| Traffic Control: | Signalized |
| Major Road Traffic Volume: | Minimum of 12000 to Maximum of 13500 Annual Average Daily Traffic (AADT) |
| Minor Road Traffic Volume: | |
| Average Major Road Volume : | |
| Average Minor Road Volume : | |
| Development Details | |
|---|---|
| Date Range of Data Used: | 1989 to 2007 |
| Municipality: | State College |
| State: | PA |
| Country: | |
| Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
| Sample Size (crashes): | 24 crashes before, 14 crashes after |
| Sample Size (sites): | 10 sites before, 10 sites after |
