A Simplified Dynamic Traffic Assignment Framework for Statewide Traffic Modeling (original) (raw)

2015

Abstract

This paper describes a simplified queue-based, capacity-constrained Dynamic Traffic Assignment (DTA) methodology that allows running large scale regional/statewide transportation models with 24 hour planning time horizon. The aim is to address challenges introduced by the regional/statewide models such as the need to accommodate long distance trips that typically traverse multiple geographies (i.e. regions, states) and multiple time periods (i.e. peak and off-peak periods), use of less detailed demand and supply representation due to almost prohibitively large network size, and model calibration and validation for real applications. The authors propose a simplified simulation-based DTA method that can represent congestion dynamics i.e. queue buildup and bottleneck formation without the need for detailed network coding and signal timing input through use of various traffic flow models. The model’s capability is demonstrated on the Maryland Statewide Transportation Model (MSTM), the f...

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