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ronald c pfefer
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Improved safety information to support highway design
Ronald C. Pfefer · National Academy Press
172 sayfa · 1999
Roads / Safety measures / Design and construction / Roads, design and construction, safety measures
Highway safety data
Ronald C. Pfefer · U.S. Dept. of Transportation, Federal Highway Administration, Research and Development, Turner-Fairbank Highway Research Center
87 sayfa · 1998
Statistics / Crash injuries / Traffic safety / Traffic accidents