United States Department of Transportation
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Cooperative Automation Research: CARMA Proof-of-Concept TSMO Use Case Testing: Transit Management (Transit Signal Priority) Concept of Operations
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2022-09-01
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[PDF-2.12 MB]
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Edition:Final Report
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Abstract:Cooperative driving automation (CDA) aims to improve the safety, traffic throughput, and energy efficiency of the transportation network by enabling vehicles and infrastructure to work together to coordinate movement. The objective of this project is to advance the CARMA℠ ecosystem to enable further capabilities for CDA participants to interact with the road infrastructure, to enhance infrastructure performance, to improve network efficiency, and ultimately, to reduce traffic congestion through transportation systems management and operations (TSMO) strategies on arterials. The concept of operations focuses on TSMO transit management (TM) transit signal priority (TSP), which investigates active traffic management applied to traffic signal corridors. TSP is a TM tool that helps a transit vehicle maintain schedule or headway adherence and reduce travel time delay attributable to traffic signals. The proposed approach for TSMO TM TSP has three components: local traffic signal optimization to reduce delay to one or more transit vehicles using CARMA Streets, corridor-coordinated TSP to optimize signal timing between transit stops using CARMA Cloud℠, and a transit dwell hold strategy to schedule the transit vehicle into a “transit green band” between transit stops using CARMA Platform℠. The proposed control framework is expected to improve schedule or headway adherence.
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