CMF / CRF Details
CMF ID: 9851
Increase Median Width
Description: Increase median width
Prior Condition: Existing Median Width
Category: Roadside
Study: In-Service Performance Evaluation of Median Cable Barriers in Iowa, Savolainen et al., 2018
Star Quality Rating: | [View score details] |
Rating Points Total: | 105 |
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Applicability | |
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Crash Type: | Cross median |
Crash Severity: | All |
Roadway Types: | Principal Arterial Other Freeways and Expressways |
Street Type: | |
Minimum Number of Lanes: | |
Maximum Number of Lanes: | |
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Number of Lanes Comment: | |
Crash Weather: | Not specified |
Road Division Type: | Divided by TWLTL |
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Speed Limit Comment: | |
Area Type: | All |
Traffic Volume: | Minimum of 1832 to Maximum of 37580 Annual Average Daily Traffic (AADT) |
Average Traffic Volume: | 10232 Annual Average Daily Traffic (AADT) |
Time of Day: | All |
If countermeasure is intersection-based | |
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Development Details | |
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Date Range of Data Used: | 2011 to 2015 |
Municipality: | |
State: | IA |
Country: | USA |
Type of Methodology Used: | Regression cross-section |
Sample Size (crashes): | 1715 crashes |
Sample Size (sites): | 3629 sites |
Sample Size (site-years): | 18145 site-years |
Sample Size (miles): | 1140 miles |
Sample Size (mile-years): | 5700 mile-years |
Other Details | |
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Included in Highway Safety Manual? | No |
Date Added to Clearinghouse: | Nov 19, 2018 |
Comments: | Applies to cross-median crashes on expressways not related to animals. Median width measured in feet. |