Chapter
Aug 31, 2020
International Conference on Transportation and Development 2020

Analysis of Complex Weaves in Managed Lanes

Publication: International Conference on Transportation and Development 2020

ABSTRACT

Express lanes are a type of managed lane strategy that use congestion pricing by varying the toll amount to maintain a performance threshold and provide a more reliable travel time. The aim of this study was to develop an analysis methodology to assess the complex or multiple weave segments formed in express lane projects due to the placement of access points. Various scenarios were tested using the Highway Capacity Software (HCS) and VISSIM microsimulation to estimate the capacity of such complex weave segments. The study recommended reporting results from HCS and volume-to-capacity (V/C) ratio obtained from microsimulation to estimate the adequate capacity of complex weave segments. This study also found that there is value in dividing the critical segment into merge, basic freeway, and diverge sections for analysis. The speed differential between weaving and non-weaving volumes was found to be minimal, if adequate length was provided and no congestion was observed.

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REFERENCES

HCM (Highway Capacity Manual) 6th Edition. (2016) “Chapter 13: Freeway Weaving Segment.” Transportation Research Board, National Research Council, Washington. D.C.
Q Cai, M Saad, M Abdel-Aty, J Yuan, J Lee. (2018). “Safety impact of weaving distance on freeway facilities with managed lanes using both microscopic traffic and driving simulations.” Transportation Research Record, 2672 (39), 130-141, DOI: https://doi.org/10.1061/JTEPBS.0000191.
Saad, M., Abdel-Aty, M., Lee, J., and Wang, L. (2018). “Safety Analysis of Access Zone Design for Managed Toll Lanes.” Journal of Transportation Engineering, Part A: Systems, 144 (11), 04018067.
Wang, Xu., Hadiuzzaman, M., Qiu, T., and Yan, X. (2014). “Sensitivity Analysis of Freeway Capacity at a Complex Weaving Segment.” 14th COTA International Conference of Transportation Professionals, DOI: https://doi.org/10.1061/9780784413623.058.
National Academies of Sciences, Engineering, and Medicine 2012. “Analysis of Managed Lanes on Freeway Facilities.” Washington, D.C. DOI: https://doi.org/10.17226/22677.
California Department of Transportation (2016) “Chapter 4: High Occupancy Vehicle (HOV) Guidelines for Planning, Design and Operations.” Division of Traffic Operations, Department of Transportation.
Texas Department of Transportation (2005) “Chapter 8: Managed Lanes Handbook.” Texas Transportation Institute, The Texas A&M University System, College Station, TX.

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Published In

Go to International Conference on Transportation and Development 2020
International Conference on Transportation and Development 2020
Pages: 239 - 250
Editor: Guohui Zhang, Ph.D., University of Hawaii
ISBN (Online): 978-0-7844-8315-2

History

Published online: Aug 31, 2020
Published in print: Aug 31, 2020

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Authors

Affiliations

Amy Causseaux [email protected]
1Florida Dept. of Transportation, Tallahassee, FL. Email: [email protected]
Maria Overton [email protected]
P.E.
2Florida Dept. of Transportation, Tallahassee, FL. Email: [email protected]
Kavita Parikh [email protected]
P.E.
3Hanson Professional Services Inc., Jacksonville, FL. Email: [email protected]
Bikram Wadhawan [email protected]
P.E.
4Hanson Professional Services Inc., Jacksonville, FL. Email: [email protected]

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