Citation

Pethe M. ITE J. 1994; 64(2): 22-26.

Copyright

(Copyright © 1994, Institute of Transportation Engineers)

DOI

unavailable

PMID

unavailable

Abstract

A simple, one-pass technique has been developed to predict the capacity of shared left-turn lanes, which is an approximate method, accurate enough for planning purposes, and provides results comparable to the Highway Capacity Manual. The method is based on existing analytical techniques and combines them with statistical regression models to predict the capacity of a shared left-turn lane with permissive phasing. The method meets all the requirements of being a non-iterative technique that produces a reasonable signal timing plan. Statistical tests show that the model is significant at the 95% confidence level and can predict the required variables to a high level of accuracy. The model is fairly sensitive to signal timing and might produce poor timing for intersections with very low or high cycle lengths and very high volumes. It, however, performed will when tested for internal consistency and produced reasonbable signal timing plans for several test cases.