Evaluating the Impact of Roadway Design Characteristics on Lane Changing near Diamond Interchanges
Publication: Journal of Transportation Engineering, Part A: Systems
Volume 149, Issue 1
Abstract
As urban road networks experience increasing demand, it is not always feasible to expand them physically. To efficiently use the available space, we need to find solutions that do not require physical expansion. Modifying design factors such as driveway access points, medians, and right turn on red control types are among the solutions that are comparatively easy and quick to implement, do not require more land, and can have a significant impact on traffic flow. This study investigates the impact of several design factors on the number of lane changes on urban arterials near freeway interchanges. While lane changing has a significant impact on traffic flow and safety, it has not received adequate research attention since lane changing maneuvers are difficult to measure. Moreover, existing lane changing research is mainly focused on freeways and highways. This study is focused on urban arterials just downstream and upstream of freeway exits and entry points near diamond interchanges, but the methodology and findings can be applied to arterials near other intersection types. The results show that driveway options, median options, and the location of the right turning bays significantly impact lane changes on urban roads near freeway interchanges. The purpose of this study is to prove that low-cost design modifications can impact lane changes, which ultimately impact the operational performance of roadways.
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Data Availability Statement
Some or all data, models, or codes used during the study were provided by a third party. Direct requests for these materials may be made to the provider as indicated in the Acknowledgments.
Acknowledgments
This research is part of a dissertation and was supported by the National Cooperative Highway Research Program (NCHRP) project 07-23 conducted at the Texas A&M Transportation Institute.
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Information & Authors
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Published In
Journal of Transportation Engineering, Part A: Systems
Volume 149 • Issue 1 • January 2023
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Nov 16, 2021
Accepted: Sep 14, 2022
Published online: Nov 7, 2022
Published in print: Jan 1, 2023
Discussion open until: Apr 7, 2023
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