CMF / CRF Details
CMF ID: 9785
Install median w-beam guardrail
Description:
Installation of w-beam guardrail as a median barrier
Prior Condition: Divided highway with open median
Category: Roadside
| Crash Modification Factor (CMF) |
|---|
| Value: | 1.8 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.25 |
| Crash Reduction Factor (CRF) |
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| Value: | -80 (This value indicates an increase in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 25 |
| Applicability |
|---|
| Crash Type: | Other |
| Crash Severity: | All |
| Roadway Types: | Principal Arterial Other Freeways and Expressways |
| 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: | Not specified |
| 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: | 2008 to 2012 |
| Municipality: | |
| State: | IN |
| Country: | United States |
| Type of Methodology Used: | Regression cross-section |
| Sample Size (crashes): | 1604 crashes |
| Sample Size (sites): | 1258 sites |
| Sample Size (site-years): | 6290 site-years |
| Sample Size (miles): | 330 miles |
| Sample Size (mile-years): | 1650 mile-years |
| Other Details |
|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Oct 27, 2018 |
| Comments: | Applies to barrier-related crashes on one side of a divided highway. Barrier-related crashes include non-cross-median high-risk events, median barrier wall collision, near-median cable barrier collision, far-side median cable barrier collision, median guardrail face collision, non-cross-median moderate-risk event, vehicle redirected and hit another vehicle, roadside guardrail collision, cross-median head-on, and cross-median non-head-on crashes. |
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