CMF / CRF Details
CMF ID: 5217
Increase work zone duration
Description: Increase work zone duration
Prior Condition: No Prior Condition(s)
Category: Work zone
Study: Effects of Work Zone Presence on Injury and Non-Injury Crashes, Khattak and Council, 2002
| Star Quality Rating: | Cannot Be Rated (HSM) |
| Rating Points Total: | |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: |  |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | |
| Crash Reduction Factor (CRF) | |
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| Value: | |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | |
| Applicability | |
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| Crash Type: | All |
| Crash Severity: | All |
| Roadway Types: | Principal Arterial Interstate |
| 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: | |
| Traffic Volume: | Minimum of 4000 to Maximum of 237000 Annual Average Daily Traffic (AADT) |
| Average Traffic Volume: | |
| Time of Day: | |
| 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 | |
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| Date Range of Data Used: | |
| Municipality: | |
| State: | |
| Country: | |
| Type of Methodology Used: | Not specified |
| Other Details | |
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| Included in Highway Safety Manual? | Yes |
| Date Added to Clearinghouse: | Mar 22, 2013 |
| Comments: | HSM 1st Ed, page 16-6. This CMF is based on work zone durations from 16 to 714 days. |
