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                Using Micro Surfacing to Reduce Wet Weather Crash Rates
**Publication Year:** 
            2011
    
        Original publication: National Roadway Safety Awards: Noteworthy Practices Guide; 2011

Description of Practice

Bridges in Minnesota were experiencing a higher crash rate than the surrounding highways. Super-elevated curve geometry was suspected in causing intensified icing and wet weather crashes. Minnesota Department of Transportation (MnDOT) experimented with using micro surfacing to reduce crash rates.

Key Accomplishments and Results

Utilized micro surfacing to address wet weather crashes
	76% reduction in wet weather crashes after placing micro surfacing
	19% reduction in total crashes after placing micro surfacing
	14:1 payback ratio at 5 year life, 19.7:1 with 7 year life"Two photographs of two-laned highways: the highway on the left is curved and the highway on the right is straight"

Contact

Thomas J. Wood
MnDOT District 3B and Office of Materials and Road Research
651-366-5573Thomas.Wood@state.mn.us U.S. DEPARTMENT OF TRANSPORTATION

**Federal Highway Administration**

1200 NEW JERSEY AVENUE, SE

WASHINGTON, DC 20590

202-366-4000Subscribe to email updates
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