Citation

Johnsen RR, Matthias JS. Highw. Res. Rec. 1973; 453: 49-55.

Copyright

(Copyright © 1973, National Research Council (U.S.A.), Highway Research Board)

DOI

unavailable

PMID

unavailable

Abstract

This research evaluated the capacity of protected left-turn movements at signalized intersections where both separate turning lanes and separate signals were provided. Capacities were determined by field observations at selected urban intersections where signals had varying cycle lengths. Observed capacities were found to be significantly larger than capacities determined by the highway capacity manual. The validity of observed results was checked by studying different intersections; no significant differences were observed. This research shows that protected left-turn capacities can be as much as one-third greater than those calculated by current procedures.

Record URL:
http://onlinepubs.trb.org/Onlinepubs/hrr/1973/453/453-004.pdf

Language: en

Keywords

TRAFFIC SURVEYS; STREET TRAFFIC CONTROL