DESIGN OF SIGNALS INCORPORATING NITW SATURATION FLOW CURVES

Abstract

This Paper is an attempt to modify Webster method of Signal design for mixed traffic scenario with high percentage of two and three wheelers vehicular traffic, it was followed by evaluation and design of an existing signal at an intersection in a medium city, Warangal (Andhra Pradesh) for the measured turning movements and vehicular delays. For this purpose, field surveys such as physical inventory, volume count with turning movements, and delay studies have been conducted at the selected intersection. Saturation flow curves developed by NIT Warangal for mixed traffic conditions have been incorporated in the analysis. The Webster method using Webster saturation flow equation failed to arrive at optimum cycle length, but Webster method using NIIW saturation flow concept produced optimum cycle length with minimum intersection control delay.