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Title:

EFFECT OF LEFT-TURN BAYS AT SIGNALIZED INTERSECTIONS ON FUEL CONSUMPTION

Accession Number:

00377365

Record Type:

Component

Availability:

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Order URL: http://worldcat.org/isbn/0309035155

Abstract:

A consequence of the reductions in delay and stops that result from the provision of left-turn bays is a reduction in fuel consumption. Less delay and fewer stops cause less fuel to be consumed by vehicle-idling and speed-change cycles. The objective of this research was to estimate the effect of the addition of left-turn bays on fuel consumption on the approaches to two-phase, signalized intersections. These effects were evaluated over a range of approach, opposing, and left-turn volumes for both left-turn bays with and without a protected left-turn phase. However, the scope of the study was limited to isolated intersections of two-way, two-lane streets. A procedure based on the critical-movement-analysis method presented in Transportation Research Board Circular 212 was used to evaluate the effect of left-turn bays. With this technique, the fuel savings that result from the addition of left-turn bays with and without protected phase, for 3360 combinations of traffic conditions were computed. These fuel savings ranged from 0.3 to 10 gal/h for traffic on the street on which the left-turn bays were added. A multiple regression analysis of these data determined that the fuel savings that result from the addition of left-turn bays with and without protected phase were curvilinear functions of the initial critical lane volume, opposing volume, and left-turn percentages. Nomographs of these relations were constructed to facilitate the calculation of potential fuel savings that result from the addition of left-turn bays at signalized intersections. (Author)

Supplemental Notes:

Publication of this paper sponsored by Committee on Operational Effects of Geometrics. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

Monograph Accession #:

00385287

Report/Paper Numbers:

HS-035 801

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Tobin, John R
McCoy, Patrick T

Editors:

Herman, Scott C

Pagination:

pp 47-49

Publication Date:

1983

Serial:

Transportation Research Record

Issue Number: 901
Publisher: Transportation Research Board
ISSN: 0361-1981

ISBN:

0309035155

Media Type:

Print

Features:

Figures (2) ; References (5)

Uncontrolled Terms:

Two way traffic

Old TRIS Terms:

Subject Areas:

Data and Information Technology; Design; Energy; Highways; Operations and Traffic Management; Planning and Forecasting; I21: Planning of Transport Infrastructure

Files:

HSL, TRIS, TRB

Created Date:

Sep 30 1984 12:00AM

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