K (fatal),A (serious injury),B (minor injury),C (possible injury)
Roadway Types:
All
Street Type:
Minimum Number of Lanes:
2
Maximum Number of Lanes:
Number of Lanes Direction:
Number of Lanes Comment:
> = 2 Lanes
Crash Weather:
Not specified
Road Division Type:
All
Minimum Speed Limit:
65
Maximum Speed Limit:
70
Speed Unit:
mph
Speed Limit Comment:
Area Type:
Rural
Traffic Volume:
Minimum of 2000 to Maximum of 50000 Annual Average Daily Traffic (AADT)
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:
2005 to 2010
Municipality:
State:
FL
Country:
USA
Type of Methodology Used:
Before/after using comparison group
Sample Size (sites):
27 sites before, 27 sites after
Sample Size (site-years):
54 site-years before, 54 site-years after
Other Details
Included in Highway Safety Manual?
No
Date Added to Clearinghouse:
Mar 08, 2016
Comments:
CMFs of installing shoulder rumble strips and widening shoulder width on rural multi-lane highways 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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