Travel Time Reliability Analysis Using Dynamic Message Sign Recordings

Abstract

Travel time is a good indicator of the performance of a street segment or the highway as a whole. However, solely, it lacks information about the overall performance of the transportation system. Travelers tend to give a higher value to consistency of travel times than the travel time itself in order to better plan their trip. Put in other terms, reliability of the route is of a great importance when assessing the system. Therefore, additional analysis is required on travel times. Various analysis approaches have been conducted for this purpose. Most commonly used are the traditional statistical methods demonstrating variability. In this paper, travel time data on the I-15 highway Las Vegas will be analyzed using the statistical approach. Moreover, new analysis methods are proposed in this study. Travel time mean estimation, non-failure analysis, and information theory based reliability. The proposed methods add to the ordinary evaluation criteria of highway systems, thus, introducing new reliability measures. Shlayan, Ratliff, Ayubi, Kachroo, Hoeft

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