00474249

Component

http://onlinepubs.trb.org...trr/1986/1069/1069-004.pdf

https://scholar.google.co...hail&publication_year=1986

The development of a new volume warrant for left-turn phasing at signalized intersections is presented. The concept is to maintain a fixed volume-to-capacity (V/C) ratio for all intersection movements. Thus left-turn phasing would be warranted when the unprotected left-turn V/C ratio exceeds that of through traffic. Left-turn capacity is derived from formulas in the Highway Capacity Manual and the Australian Road Research Board Capacity Manual. The warrant also combines both signal-timing and capacity-analysis procedures. The proposed warrant has been compared with other methods found in the literature and the results are, in general, favorable. This study is preliminary in nature; its scope is limited to four-legged intersections with one through lane and an exclusive left-turn lane of adequate length on all approaches. No adjustments for trucks, buses, or pedestrian interference are considered. Finally, it is understood that traffic signal parameters are selected according to Webster's optimum settings for fixed-time signals.

Publication of this paper sponsored by Committee on Traffic Control Devices. Publication of this paper sponsored by Committee on Traffic Control Devices. 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

00490259

HS-040 094

p. 20-24

1986

Transportation Research Record

0-309-04063-9

Figures (4) ; References (9) ; Tables (1)

Highway capacity; Left turn phase; Ratios; Traffic volume; Warrants (Traffic control devices)

Highways; Operations and Traffic Management; I73: Traffic Control

HSL, TRIS, TRB

Oct 31 1990 12:00AM

• A FURTHER NOTE ON UNDULATION AS A SPEED CONTROL DEVICE
• A PROBABILISTIC APPROACH FOR DETERMINING THE CHANGE INTERVAL (DISCUSSION AND CLOSURE)
• A REASSESSMENT OF THE TRAFFIC SIGNAL CHANGE INTERVAL
• ACCIDENT EXPERIENCE OF FLASHING TRAFFIC SIGNAL OPERATION IN PORTLAND, OREGON
• ADAPTING THE U.S. DEPARTMENT OF TRANSPORTATION RAIL-HIGHWAY CROSSING RESOURCE ALLOCATION MODEL TO THE MICROCOMPUTER
• COUNTERING SIGN VANDALISM WITH PUBLIC SERVICE ADVERTISING (ABRIDGMENT)
• CRITIQUE OF RAIL-HIGHWAY GRADE CROSSING EFFECTIVENESS RATIOS AND RESOURCE ALLOCATION PROCEDURES (DISCUSSION AND CLOSURE)
• EFFECTIVENESS OF FLASHING BEACONS IN REDUCING ACCIDENTS AT A HAZARDOUS RURAL CURVE (ABRIDGMENT)
• GUIDELINES FOR PROTECTED/PERMISSIVE LEFT-TURN SIGNAL PHASING
• GUIDELINES FOR SELECTING TYPE OF LEFT-TURN PHASING
• RUMBLE STRIPS AND PAINT STRIPES AT A RURAL INTERSECTION
• THE EFFECTS OF WIDE EDGE LINES ON LATERAL PLACEMENT AND SPEED ON TWO-LANE RURAL ROADS
• THE SAFETY, ECONOMIC, AND ENVIRONMENTAL CONSEQUENCES OF REQUIRING STOPS AT RAILROAD-HIGHWAY CROSSINGS
• THE USE OF CONSTANT WARNING TIME SYSTEMS AT RAIL-HIGHWAY GRADE CROSSINGS
• TIMING DESIGN OF SIGNAL CHANGE INTERVALS (DISCUSSION AND CLOSURE)
• TIMING DESIGN OF TRAFFIC SIGNALS
• VALIDATION OF A TRAFFIC MODEL