Citation

Janoff MS, Freedman M. Transp. Res. Rec. 1983; 904: 92-96.

Copyright

(Copyright © 1983, Transportation Research Board, National Research Council, National Academy of Sciences USA, Publisher SAGE Publishing)

DOI

unavailable

PMID

unavailable

Abstract

The objective of this paper is to report the results of an experiment that evaluated the effects of partial interchange lighting, complete interchange lighting, and no lighting on traffic operations at a freeway interchange. A freeway interchange that possessed a modern and complete lighting system was chosen for the experiment. The lighting was temporarily modified so that two levels of partial lighting and unlit conditions could be provided. Traffic operational data that consisted of velocities, accelerations, brake occurrences, gore and shoulder encroachments, high-beam use, and diverging and merging patterns were collected for five study conditions--daylight, complete lighting, partial lighting (two types), and no lighting--for both an exit and an entrance ramp by using a newly designed data-collection system capable of recording complete trajectory information on individual vehicles. The results indicated that complete interchange lighting is superior to partial interchange lighting in providing smoother and safer nighttime operations at the interchange.

Language: en

Keywords

HIGHWAY SYSTEMS - Interchanges; STREET LIGHTING