Citation

Chandra S, Sikdar PK, Kumar V. Road Transp. Res. 1994; 3(1): 60-73.

Copyright

(Copyright © 1994, Australian Road Research Board)

DOI

unavailable

PMID

unavailable

Abstract

The presence of right-turning vehicles affects the saturation flow at a signalized intersection approach by influencing the flow of straight-through vehicles. When the right-turn movement is independent of the straight-through movement, the saturation flow of the intersection is affected by the allocation of cycle time to the right-turners and the provision of separate lanes. When the right-turn is combined with the straight movement, turning vehicles interfere with through vehicles and the total saturation flow is reduced. In this study, the saturation flow of right-turn lanes was compared with that of through lanes at several signalized intersections in New Delhi, India. Mathematical models to calculate the PCU for a right-turning vehicle were developed, and its variation with traffic mix was explained. Equivalency factors, defined as the ratio of through saturation flow to right-turn saturation flow, were developed for particular values of turn radius.