CMF / CRF Details
Install pedestrian countdown timer
Countermeasure ID: 10116
Description: Install pedestrian countdown timer
Prior Condition: No Prior Condition(s)
Category: Intersection traffic control
Study: Safety Evaluation of Pedestrian Countdown Signals - Definitive Results from Two Cities in the United States, Srinivasan et al., 2019
| Crash Modification Factor (CMF) |
|---|
| Value: | 0.988 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.026 |
| Crash Reduction Factor (CRF) |
|---|
| Value: | 1.2 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 2.6 |
| Applicability |
|---|
| 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: | |
| Minimum Speed Limit: | |
| Maximum Speed Limit: | |
| Speed Unit: | |
| Speed Limit Comment: | |
| Area Type: | Urban |
| Traffic Volume: | |
| Average Traffic Volume: | |
| Time of Day: | Not specified |
| If countermeasure is intersection-based |
| Intersection Type: | |
| Intersection Geometry: | 3-leg,4-leg |
| 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: | |
| Municipality: | Charlotte & Philadelphia |
| State: | NC,PA |
| Country: | USA |
| Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
| Sample Size (crashes): | 2283.8 crashes after |
| Sample Size (sites): | 333 sites before, 333 sites after |
| Other Details |
|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Dec 17, 2020 |
| Comments: | |
[View score details]