Capacity and Operational Effects of Midblock Left-turn Lanes
Capacity and Operational Effects of Midblock Left-turn Lanes

Author: James A. Bonneson

Publisher: Transportation Research Board

Published: 1997

Total Pages: 148

ISBN-13:

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The objective of this research project was to develop a methodology for evaluating alternative midblock left-turn treatments on urban and suburban arterials. The methodology had to be applicable to three common midblock left-turn treatments: the raised-curb median, the flush median with two-way left-turn lane (TWLTL) delineation, and the undivided cross section. The methodology developed for this research focuses on the evaluation of midblock street segments on urban and suburban arterials. The basis for NCHRP Report 395.

Capacity and Operational Effects of Midblock Left-turn Lanes
Capacity and Operational Effects of Midblock Left-turn Lanes

Author: James A. Bonneson

Publisher: Transportation Research Board

Published: 1997

Total Pages: 148

ISBN-13: 9780309060677

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The objective of this research project was to develop a methodology for evaluating alternative midblock left-turn treatments on urban and suburban arterials. The methodology had to be applicable to three common midblock left-turn treatments: the raised-curb median, the flush median with two-way left-turn lane (TWLTL) delineation, and the undivided cross section. The methodology developed for this research focuses on the evaluation of midblock street segments on urban and suburban arterials. The basis for NCHRP Report 395.

Operational Impacts of Median Width on Larger Vehicles
Operational Impacts of Median Width on Larger Vehicles

Author: Douglas W. Harwood

Publisher: Transportation Research Board

Published: 2000

Total Pages: 80

ISBN-13: 9780309068659

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This synthesis report will be of interest to officials and staff of municipal, regional, and statewide transportation agencies responsible for roadway design and traffic control. It will be of special interest to those concerned with intersections and driveways on divided highways where larger vehicles encounter narrow medians. It will also be of interest to other professionals who interact with these agencies to mitigate such problems. This report presents state-of-the-practice information about current median design policies and practices, describes the traffic operational and safety problems encountered in designing for larger vehicles at divided highway intersections, and identifies alternative improvement techniques that can be used in new construction or reconstruction projects to avoid introducing traffic operational and safety problems. This TRB report focuses on 10 alternative cross sections widely used on arterial highways in urban, suburban, and rural environment.

Safety of U-turns at Unsignalized Median Openings
Safety of U-turns at Unsignalized Median Openings

Author: Ingrid B. Potts

Publisher: Transportation Research Board

Published: 2004

Total Pages: 142

ISBN-13: 0309088054

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"TRB's National Cooperative Highway Research Program (NCHRP) Report 524: Safety of U-Turns at Unsignalized Median Openings includes recommended guidelines for locating and designing unsignalized median openings, and a methodology for comparing the relative safety performance of different designs"--Publisher's description.

State of the Practice in Highway Access Management
State of the Practice in Highway Access Management

Author: Jerome S. Gluck

Publisher: Transportation Research Board

Published: 2010

Total Pages: 124

ISBN-13: 0309143055

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This synthesis reports how various agencies have acted on the various components of an access management program, what have been barriers to action, and how new efforts might improve implementation of access management strategies. Primary focus areas considered are legal and legislative bases, contents of policies and programs, implementation aspects, reported effectiveness of program implementation, and profiles of contemporary practice. This synthesis reports on the state of the practice with respect to planning, highway design, development review and permitting, and other focus areas where access management is typically incorporated. The emphasis is placed on states, but counties, municipalities, and metropolitan planning organizations are also considered.

Operational Analysis of Bus Lanes on Arterials
Operational Analysis of Bus Lanes on Arterials

Author: Kevin St. Jacques

Publisher: Transportation Research Board

Published: 1997

Total Pages: 84

ISBN-13: 9780309062503

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Contains guidelines for estimating bus lane capacities and speeds along arterial streets. It recommends level-of-service thresholds for buses based on speed, and it presents procedures for estimating the speed of buses using dedicated bus lanes on arterial streets.