United States Department of Transportation
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CDOT Dynamic Traffic Assignment (DTA) Implementation Plan
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2022-12-01
[PDF-1.97 MB]
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Edition:Final (2021-2022)
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Abstract:This report presents a vision and an implementation plan for region-wide dynamic traffic assignment (DTA) in Colorado. With the proper approach and methods, DTA can be a powerful and cost-effective decision support tool for CDOT’s and MPOs’ transportation planning and engineering responsibilities and activities. In the report, simulation-based DTA models are described, and their key features are explained and placed in the context of current traffic microsimulation and travel demand modeling practices. DTA makes it possible to address numerous traffic management and operations strategies, to improve project evaluation, and, with suitable implementation and application, realize benefits in the form of reduced traffic delay, improved safety, lower greenhouse gas emissions, and greater toll revenues from dynamically-priced facilities. DTA will also reduce costs and improve the quality and consistency of future simulation studies. The report outlines a recommended technical approach to DTA employing regional mesoscopic simulation with capabilities for hybrid mesoscopic-microscopic simulation for increased detail and accuracy when needed. The report provides an implementation plan for realizing the technical approach and capturing the benefits of DTA in metropolitan areas big and small across Colorado. The implementation plan identifies steps, methods, best practices, and recommendations for successful DTA development, calibration, and application.
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