Citation

Wong YD, Nicholson A. Accid. Anal. Prev. 1992; 24(4): 425-436.

Affiliation

School of Civil and Structural Engineering, Nanyang Technological University, Singapore.

Copyright

(Copyright © 1992, Elsevier Publishing)

DOI

unavailable

PMID

1605823

Abstract

A study involving unobtrusive observation of drivers at horizontal curves before and after realignment is described. The speeds and path radii adopted by drivers in the curves before and after realignment are compared, as are the levels of side friction demanded by each driver while negotiating the curves before and after realignment. The results reveal substantial variations between drivers (with respect to speed, path radius, and side friction demand) and between the path and curve radii. While vehicle speeds increased markedly, the side friction demand was reduced for all curves except one. It is concluded that the margin of safety was increased for all curves, and this is supported by the accident data.