Multi criteria analysis to prioritize the user expectation at traffic signals

Abstract

Traffic signals regulate complex traffic situations and aim to ensure that all road users safely pass the scenario and provide an orderly traffic flow. Discrepancies between road users at traffic signals can have an impact on the smooth flow of traffic and the effectiveness of travel. It is important to understand the user expectations at traffic signals and identify the most prioritized expectations. This study aimed to identify and prioritize the user expectations at traffic signals considering different user groups. Expectations of different user categories on safety, delay and ease of use were identified through a literature review. A survey was conducted to understand the priorities for the above-identified categories and parameters. This study obtained responses from 357 participants via a questionnaire survey. Collected data were analysed using the multi-criteria analysis. From the analysis, it was found that all road users prioritize safety more than delay and convenience of use. Drivers and passengers give more importance to user violations during red-light signals, jaywalking (crossing the road illegally) and high speed at the end of the amber period for when considering the safety parameters. Further, expectation differences in each subset of groups were analysed by considering age, gender and mode of travel.