00647261

Component

http://onlinepubs.trb.org...trr/1993/1421/1421-001.pdf

https://scholar.google.co...oppe&publication_year=1993

Field studies were conducted in the Phoenix and Tucson metropolitan areas for the purpose of comparing the operational differences between leading and lagging left-turn signal phases. Delay studies were conducted in both areas at isolated intersections, and the influence on signal system progression was evaluated at three locations in the Phoenix area. In both areas, the lagging left-turn phases do not utilize overlaps even though phase overlaps were used with the leading left-turn operations. Intersections with protected-only as well as protected-plus-permissive left turns were included. The study involved a before-and-after analysis of the intersection as well as arterial operations. For the individual intersections, the field studies found that the intersection delay is significantly greater with the lagging left-turn operation. This finding was true for both of the metropolitan areas. In terms of the signal system progression, no significant differences were found in progression among the leading, lagging, and mixed operations.

This paper appears in Transportation Research Record No. 1421, Traffic Control Devices, Visibility, and Traffic Signal Systems. 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

01398730

English

p. 1-10

1993

Transportation Research Record

0309055741

Figures (2) ; References (3) ; Tables (10)

Arterial highways; Before and after studies; Exclusive permissive phasing; Exclusive phasing; Field studies; Isolated intersections; Lagging (Earthwork); Left turn phase; Streets; Traffic delays; Traffic signal control systems

Phoenix (Arizona); Tucson (Arizona)

Phoenix (Arizona); Tucson (Arizona)

Highways; Operations and Traffic Management; I73: Traffic Control

TRIS, TRB

May 2 1994 12:00AM

• ANALYSIS OF FLASHING SIGNAL OPERATION
• DECISION SUPPORT SYSTEM FOR CONTROLLING TRAFFIC SIGNALS
• DEVELOPMENT OF AN EMERGENCY ZONE SIGN
• ENHANCEMENTS TO THE PASSER II-90 DELAY ESTIMATION PROCEDURES
• ENTRANCE ANGLE REQUIREMENTS FOR RETROREFLECTORIZED TRAFFIC SIGNS
• EVALUATION OF THE FEDERAL VISION STANDARD FOR COMMERCIAL MOTOR VEHICLE OPERATORS
• EXACT ROAD GEOMETRY OUTPUT PROGRAM FOR RETROREFLECTIVE ROAD SIGN PERFORMANCE
• HYBRID GENETIC ALGORITHM TO OPTIMIZE SIGNAL PHASING AND TIMING
• METHODOLOGY FOR EVALUATING TRAFFIC DETECTOR DESIGNS
• MICROSCOPIC SIMULATION MODELING OF MINIMUM THRESHOLDS WARRANTING INTERSECTION SIGNALIZATION
• PASSER IV: A PROGRAM FOR OPTIMIZING SIGNAL TIMING IN GRID NETWORKS (WITH DISCUSSION AND CLOSURE)
• SELECTION CRITERIA FOR LEFT-TURN PHASING AND INDICATION SEQUENCE