Documents in the Category: Auxiliary Lanes

Combined AMAG & AM Manual

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 TRB's newest publications on access management draw on national and state research to respond to the need for a more coordinated approach to transportation and community design that preserves the safe and efficient movement of peoples and goods, provides supporting networks in developed areas, and reinforces desired urban form.

Access Management Application Guidelines (AMAG)

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TRB's Access Management Application Guidelines (AMAG) focuses on the applications of access management concepts and provides research-based guidelines on access management treatments and procedures for their applications. The AMAG is a how-to tool for continuing the evolution of access management applications in the United States.

Design of Right Turn Lanes

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This paper provides an expansion and explanation of the presentation of the "Design of Right-Turn Lanes" presented in Session 619 of the 2015 Annual Meeting of the Transportation Research Board. The paper addresses the operational issues and the design of right-turn lanes. As indicated in the paper, many issues relating to right-turn lanes are the same as for left-turn lanes. Deceleration rates reported in NCHRP Report 780 for left-turns are reasonably consistent with those previously assumed. The rationale for taper length as opposed to taper ratio is discussed.

Second International Conference on Access Management Proceedings 2014

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Proceedings of the Second International Conference on Access Management held in Shanghai, China, September 25-27, 2014. Sponsored by the Access Management Committee of the Transportation Research Board; Tongji University; Shanghai Jiaotong University; the Research Institute of the Ministry of Public Security, PRC; the Research Institute of Highway, PRC; the Ministry of Transportation, PRC; and the Construction Institute of ASCE

Access Management Manual 2014 - 2nd Edition

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TRB’s Access Management Manual, second edition, provides guidance on a coordinated approach to transportation and community design that is designed to help enhance mobility, provide greater mode choice, and improve environmental quality. The content is interdisciplinary, with guidance pertinent to various levels of government as well as to pedestrians, bicyclists, and motorized vehicles, including trucks and buses. Access management is addressed comprehensively, as a critical part of network and land use planning. Key updates include

Design Guidance for Intersection Auxiliary Lanes

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TRB’s National Cooperative Highway Research Program (NCHRP) Report 780: Design Guidance For Intersection Auxiliary Lanes expands on guidance provided in A Policy on Geometric Design of Highways and Streets (the Green Book), published by the American Association of State Highway and Transportation Officials (AASHTO). This report highlights information regarding bypass lanes, channelized right-turn lanes, deceleration and taper length, design and capacity of multiple left-turn lanes, and alternative intersection designs.

Measurement and Comparison of Acceleration and Deceleration Zones at Traffic Control Intersections

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Boonsiripant, S., M. Hunter, K. Dixon and M.O. Rogers, “Measurement and Comparison of Acceleration and Deceleration Zones at Traffic Control Intersections,” Proceedings of the 89th Annual Meeting of the Transportation Research Board, ( 2010)

NCHRP Synthesis 299

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The objective of this synthesis was to summarize the key findings of various geometric design research efforts published in the 1990s. In the decade following the publication of the 1990 edition of AASHTO’s A Policy on Geometric Design of Highways and Streets (also known as the Green Book), the research community conducted a large amount of research with potentially significant implications on safety and operations. The primary goal of this synthesis was to capture and distribute that information for consideration in the development of the 2004 edition of the Green Book.

Channelized Right-Turn Lanes

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NCHRP Project 03-89, “Channelized Right-Turn Lanes,” Active TRB Project. MRIGlobal submitted the final report for this project in July of 2011. As indicated in the summary for NCHRP Project 3-72, the study of the channelized right-turn lanes exceeded the available budget and so was deemed outside the scope of that project. Subsequently, NCHRP Project 03-89 then directly focused on the design and use of channelized right-turn lanes.