Citation

Farber EI, Grush ES, Rezabek SE. Transp. Res. Rec. 1976; 600: 30-32.

Copyright

(Copyright © 1976, Transportation Research Board, National Research Council, National Academy of Sciences USA, Publisher SAGE Publishing)

DOI

unavailable

PMID

unavailable

Abstract

An analysis was undertaken to obtain an estimate of the accident and dollar savings that might be realized from the installation of side-mounted turn signals on passenger cars. An analytical model was developed that predicts the probability of an accident with and without a side turn signal given that the lead driver makes a blind lane change. Annual side turn signal benefits were then estimated by calculating the number of vehicles saved from being in accidents through provision of a side turn signal. The analytical procedure involved three different tasks. First, an adjacent lane overtaking model was developed that defined the overtaking situations in which an accident would occur under each of several different environmental conditions. Next, a probability model was employed to estimate the accident likelihoods under each of these conditions. Finally, a survey of accident data yielded the relative accident frequencies of these conditions and also produced an estimate of the overall number of lane-change crashes expected to occur each year.