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
Total Pages: 148
Release: 1997
Genre: Technology & Engineering
ISBN: 9780309060677

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.

Geometric Design and Operational Effects

Geometric Design and Operational Effects
Author: National Research Council (U.S.). Transportation Research Board
Publisher: Transportation Research Board National Research
Total Pages: 72
Release: 1989
Genre: Technology & Engineering
ISBN:

Operational Impacts of Median Width on Larger Vehicles

Operational Impacts of Median Width on Larger Vehicles
Author: Douglas W. Harwood
Publisher: Transportation Research Board
Total Pages: 80
Release: 2000
Genre: Transportation
ISBN: 9780309068659

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.