@article{ref1,
title="Effect of lane and shoulder widths on accident reduction on rural, two-lane roads",
journal="Transportation research record",
year="1981",
author="Zegeer, Charles V. and Deen, Robert C. and Mayes, Jesse G.",
volume="806",
number="",
pages="-",
abstract="A study to determine the effect of lane and shoulder widths on accident benefits for rural, two-lane roads and to determine the expected cost-effectiveness of lane and shoulder widening is described. Information concerning geometrics, accidents, and traffic volumes was obtained for more than 25,000 km (15,000 miles) of roads. Run-off-road and opposite-direction accidents were the only accident types found to be associated with narrow lanes and shoulders. Wide lanes had accident rates 10-39 percent lower than those for narrow lanes. Wide shoulders (up to 2.7-m (9-ft) width) were associated with the lower accident rates. Criteria based on a cost-effectiveness approach for selecting highway sections for widening are presented.<p />",
language="en",
issn="0361-1981",
doi="",
url="http://dx.doi.org/"
}