NDLI: Estimating urban traffic states using iterative refinement and Wardrop equilibria

Content Provider	IET Digital Library
Author	Li, Weizi Jiang, Meilei Chen, Yaoyu Lin, Ming C.
Abstract	Traffic has become a major problem in metropolitan areas across the world. It is critical to understand the complex interplay of a road network and its traffic states so that researchers and planners can improve the city planning and traffic logistics. The authors propose a novel framework to estimate urban traffic states using GPS traces. Their approach begins with an initial estimation of network travel times by solving a convex optimisation programme based on Wardrop equilibria. Then, they iteratively refine the estimated network travel times and vehicle traversed paths. Lastly, using the refined results as input, they perform a nested optimisation process to derive traffic states in areas without data coverage to obtain full traffic estimations. The evaluation and comparison of their approach over two state-of-the-art methods show up to 96% relative improvements. In order to study urban traffic, the authors have further conducted field tests in Beijing and San Francisco using real-world GIS data, which involve 128,701 nodes, 148,899 road segments, and over 26 million GPS traces.
Starting Page	875
Ending Page	883
Page Count	9
ISSN	1751956X
Volume Number	12
e-ISSN	17519578
Issue Number	Issue 8, Oct (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-its/12/8
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-its.2018.0007
Journal	IET Intelligent Transport Systems
Publisher Date	2018-05-10
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	City Planning Convex Optimisation Programme Convex Programming GPS Traces Interpolation And Function Approximation Iterative Method Iterative Refinement Metropolitan Areas Nested Optimisation Process Network Travel Time Estimation Numerical Analysis Optimisation Technique Real-world GIS Data Road Traffic System Theory Application in Transportation Traffic Logistics Urban Traffic Urban Traffic State Estimation Vehicle Traversed Paths Wardrop Equilibria
Content Type	Text
Resource Type	Article
Subject	Law Transportation Environmental Science Mechanical Engineering

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