00474250

Component

http://onlinepubs.trb.org...trr/1986/1069/1069-007.pdf

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

At the present time, there is no uniform method of application of left-turn signal phasing throughout the United States. Different jurisdictions use different approaches to determine which type of left-turn phasing--permissive, exclusive, or exclusive/permissive--should be used. Guidelines for selecting the appropriate type of left-turn signal phasing are presented. The guidelines are based on the effect of different types of phasing on left-turn delay, through delay, and safe intersection operation. The effect of different types of left-turn phasing on left-turn and through delay was determined from observing six arterial-arterial intersections. Time-lapse photography was used to observe volume, number of vehicles stopping, total delay, average delay per stopped vehicle, and average delay for all approach vehicles for each turning movement. The guidelines presented select the type of left-turn phasing based on left-turn volume, opposing volume, number of opposing lanes, cycle length, approach speed, sight distance restrictions, and accident history.

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-040 096

pp 30-38

1986

Transportation Research Record

0-309-04063-9

Print

Figures (5) ; References (3) ; Tables (1)

Approach; Crash rates; Exclusive permissive phasing; Exclusive phasing; Guidelines; Left turn phase; Length; Opposing traffic; Permissive phasing; Sight distance; Speed; Stopping; Time lapse photography; Traffic delays; Traffic safety; Traffic signal cycle; Traffic volume

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
• ANALYTICAL WARRANT FOR SEPARATE LEFT-TURN PHASING (ABRIDGMENT)
• 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
• 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