CMF / CRF Details
Median treatment for ped/bike safety
Countermeasure ID: 9122
Description: Install various median treatment: median fencing, sidewalk fencing, median brick planters, pedestrian islands
Prior Condition: No Prior Condition(s)
Category: Roadside
Study: Analyzing the Impact of Median Treatments on Pedestrian/Bicyclist Safety, Zhang et al., 2017
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 60 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 1.12 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.18 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | -12 (This value indicates an increase in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 18 |
| Applicability | |
|---|---|
| Crash Type: | Vehicle/bicycle,Vehicle/pedestrian |
| Crash Severity: | All |
| 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: | Divided by Median |
| Minimum Speed Limit: | |
| Maximum Speed Limit: | |
| Speed Unit: | |
| Speed Limit Comment: | |
| Area Type: | Urban |
| 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: | 1998 to 2016 |
| Municipality: | |
| State: | MD |
| Country: | USA |
| Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
| Sample Size (crashes): | 49 crashes after |
| Sample Size (sites): | 18 sites before, 18 sites after |
| Sample Size (site-years): | 54 site-years before |
| Other Details | |
|---|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Jan 17, 2018 |
| Comments: | For all ped/bike related crashes |
