Chapter
Apr 26, 2012
The Minimum Access Control Spacing for Off-Ramps with Crossroads
Authors: Zhongbin Xiao, Wei Wang, and Wenquan LiAuthor Affiliations
Publication: Traffic and Transportation Studies
Abstract
The paper presents a method for determining the optimal access spacing for expressway interchanges with crossroads. With the definition and basic hypothesis of access spacing, the characteristics of its structure and traffic flow are analyzed. From a systematic viewpoint, Kinematics, gap-acceptance theory, and probability theory are employed to establish the minimum-length-requirement model for access spacing. While modeling, the more difficult traffic maneuver of running off the ramp, finishing its interweaving and running onto the left-turn lane of a downstream intersection is taken into consideration. For an existing road, based on the comparison of the measured value and calculated value, the model is helpful for finding the reasons of congestion in the access space and taking corresponding improvement measures. Finally, the model is verified to be feasible through comparison with the simulation results of CORSIM.
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Copyright
© 2008 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
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ASCE Technical Topics:
- Comparative studies
- Engineering fundamentals
- Highway and road management
- Highway transportation
- Highways and roads
- Information management
- Infrastructure
- Interchanges
- Methodology (by type)
- Models (by type)
- Ramps (road)
- Research methods (by type)
- Spacing
- Terminology and definition
- Traffic engineering
- Traffic flow
- Traffic management
- Traffic models
- Transportation engineering
Authors
Affiliations
Zhongbin Xiao
Ph.D. Candidate, Professor, Construction Engineering College, Yangzhou University, Yangzhou, 225009, P.R. China; Transportation College, Southeast University, Nanjing, 210096, P.R. China
Wei Wang
Ph.D. Candidate, Construction Engineering College, Yangzhou University, Yangzhou, 225009, P.R. China
Wenquan Li
Professor, Transportation College, Southeast University, Nanjing, 210096, P.R. China
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