The capacity analysis procedure for signalized intersections included in the HighwayCapacity Manual (HCM) needs to consider the lane configuration (lane position and number of lanes) of agiven traffic intersection. However, the attention given to this matter appears to be inadequate. The mainobjective of this paper is to examine the effects of lane configuration on the saturation flow at signalizedintersections of Asian cities. This paper also aimed at developing the saturation flow rate correction factorsfor lane configuration at signalized intersections. Analysis of variance (ANOVA) was performed to evaluatewhether the lane configuration (lane position and lane numbers) of a given intersection had a significantimpact on the saturation flow rate. Saturation flow rate adjustment factors for lane configuration aredeveloped dividing the prevailing saturation flow rate by ideal saturation flow rate. It is suggested by theanalysis that lane configuration have significant impact on the saturation flow at signalized intersectionapproaches.
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