CMF / CRF Details
CMF ID: 5631
Change street surface condition from poor to good
Description:
Pedestrian crashes only at road segments.
Street surface conditions:
Poor: serious potholes or other hazards
Fair: minor bumps, dips, or rough pavement
Good: smooth and free of hazards
Prior Condition: Roadways with poor pavement condition
Category: Roadway
| Crash Modification Factor (CMF) |
|---|
| Value: | 0.74 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.279 |
| Crash Reduction Factor (CRF) |
|---|
| Value: | 26 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 27.9 |
| 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: | 2 |
| Maximum Number of Lanes: | 2 |
| Number of Lanes Direction: | |
| Number of Lanes Comment: | |
| Crash Weather: | Not specified |
| Road Division Type: | Undivided |
| Minimum Speed Limit: | |
| Maximum Speed Limit: | |
| Speed Unit: | |
| Speed Limit Comment: | |
| Area Type: | Rural |
| Traffic Volume: | Minimum of 410 to Maximum of 26943 Annual Average Daily Traffic (AADT) |
| Average Traffic Volume: | 4209 Annual Average Daily Traffic (AADT) |
| 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: | 2007 to 2011 |
| Municipality: | |
| State: | VA |
| Country: | USA |
| Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
| Sample Size (sites): | 35 sites before, 35 sites after |
| Sample Size (site-years): | 70 site-years before, 70 site-years after |
| Other Details |
|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Aug 12, 2014 |
| Comments: | CMF of changing pavement condtion from poor(CCI below 60) to good (CCI beyond 70)at road segments with 11ft,11.5ft,or 12ft lanes The number of crashes in the after period were not reported in this study, however, they have been recorded as 300 to give 10 points as a beneift of doubt for one or more of the following: (1) number of miles/sites in the reference/treatment group, (2) number of crashes in the references/treatment group, (3) reporting AADTs for the aggregate dataset but not for the disaggragate dataset used for CMF development. |
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