Citation

Fries JR, Ross LJ. Highw. Res. Board bull. 1961; 298: 51-53.

Copyright

(Copyright © 1961, National Research Council (U.S.A.), Highway Research Board)

DOI

unavailable

PMID

unavailable

Abstract

A determination is made of the median width that will best avoid blinding glare from high-beam headlights of oncoming automobiles. Test a was carried out on a graveled airplane runway with small vegetation growing thereon. It was found, for example, that at 50 mph the safe stopping distance is 350 feet and the minimum safe median width is 30 to 40 feet. To check the results obtained in test a, a source intensity curve with candlepower as a function of median width and distance from the source was prepared. It was concluded that further studies are needed.