Calibration of Saturation Flow for Signalized Intersections

Abstract:

Transport infrastructure has been playing an increasingly important role to the world economy. Intersections have been widely accepted as the bottlenecks for an urban transport system. As such, the intersection design has been of great importance for transport agencies. Saturation flow is the most important design parameter for traffic signal timing. In this study, we aim to calibrate saturation flows for signalized intersections. Based on calibrated saturation flows, we thus intend to examine whether headways between consecutive vehicles during a queue are affected by intersection shapes and speed limit. To this end, five signalized intersections are observed to collect time headways. According to collected time headways, saturation headways in various cycles are calibrated using linear regression models. Finally, according to analysis of variance (referred to as ANOVA hereafter), we reveal that there is no direct relationship among speed limit, intersection shape, and saturation headways.

• Periodical: Applied Mechanics and Materials (Volumes 713-715)
• Pages: 2093-2096
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.713-715.2093
• Online since: January 2015
• Authors: Liang Ren*
• Keywords: ANOVA, Intersection Capacity, Saturation Flow, Signalized Intersection Design

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