00605644

Component

http://onlinepubs.trb.org...trr/1990/1287/1287-010.pdf

The interaction of pedestrians and vehicles on urban roadways is complex. Although concerns for safety usually prevail, capacity and convenience (i.e., quality of service) are also important considerations in the design and evaluation of transportation facilities. The effect of radius and pedestrian flows on saturation flow is of interest. These factors consequently affect the capacity of right-turn lanes at signalized intersections in which pedestrians share the crosswalk space during some portions of the green signal intervals. Canadian, Australian, and U.S. right-turn saturation flow adjustment procedures will be described, and some of the considerations being evaluated during the revision process of the Canadian Capacity Guide for Signalized Intersections (CCG) will be presented. A modification of the saturation flow adjustment techniques included in the CCG is recommended to express the combined effect of a small radius and the presence of pedestrians on right-turn lane capacity. The proposed procedure, process and rationale leading to the development of the suggestions, and implications for the 1985 Highway Capacity Manual are discussed.

This paper appears in Transportation Research Record No. 1287, Traffic Flow, Capacity, Roadway Lighting, and Urban Traffic Systems 1990. 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

01411069

p. 82-95

1990

Transportation Research Record

0309050626

Figures (14) ; References (12)

Adjustment factors; Equipment maintenance; Highway capacity; Pedestrians; Radius; Right turn lanes; Right turns; Saturation flow; Signalized intersections

Highway Capacity Manual

Equipment adjustment

Australia; Canada; United States

Design; Highways; Maintenance and Preservation; Operations and Traffic Management; Pedestrians and Bicyclists; Planning and Forecasting; I21: Planning of Transport Infrastructure; I71: Traffic Theory

TRIS, TRB, ATRI

Mar 31 1991 12:00AM

• ADAPTIVE FORECASTING OF FREEWAY TRAFFIC CONGESTION
• CAPACITY AND DELAY ESTIMATION FOR PRIORITY UNSIGNALIZED INTERSECTIONS: CONCEPTUAL AND EMPIRICAL ISSUES
• CAPACITY AND SPEED-FLOW ANALYSIS OF THE QUEEN ELIZABETH WAY IN ONTARIO
• CONFLICT SIMULATION IN INTRAS: APPLICATION TO WEAVING AREA CAPACITY ANALYSIS
• CONGESTION IDENTIFICATION ASPECTS OF THE MCMASTER INCIDENT DETECTION ALGORITHM
• CONSPICUITY OF RETROREFLECTIVE SIGNS AND DEVICES AT NIGHT WHEN DRIVING WITH ONLY ONE HEADLAMP WORKING
• COUNTERBEAM LIGHTING, A PROVEN ALTERNATIVE FOR THE LIGHTING OF THE ENTRANCE ZONES OF ROAD TUNNELS
• DETECTING ERRONEOUS LOOP DETECTOR DATA IN A FREEWAY TRAFFIC MANAGEMENT SYSTEM
• ESTIMATING AVERAGE CYCLE LENGTHS AND GREEN INTERVALS OF SEMIACTUATED SIGNAL OPERATIONS FOR LEVEL-OF-SERVICE ANALYSIS
• ESTIMATING CAPACITY OF AN ALL-WAY-STOP-CONTROLLED INTERSECTION
• FLOW PROCESSES AT A FREEWAY BOTTLENECK
• LATE-NIGHT TRAFFIC SIGNAL CONTROL STRATEGIES FOR ARTERIAL SYSTEMS
• MEASURING DELAY AND SIMULATING PERFORMANCE AT ISOLATED SIGNALIZED INTERSECTIONS USING CUMULATIVE CURVES
• MEASURING LEVEL OF SERVICE OF TWO-LANE HIGHWAYS BY OVERTAKINGS
• MODEL OF TURNING MOVEMENT PROPENSITY
• MODELING THE LEFT-TURN ADJUSTMENT FACTOR FOR PERMITTED LEFT TURNS MADE FROM SHARED LANE GROUPS
• MULTIBAND--A VARIABLE-BANDWIDTH ARTERIAL PROGRESSION SCHEME
• ON-LINE DIVERSION PREDICTION FOR DYNAMIC CONTROL AND VEHICLE GUIDANCE IN FREEWAY CORRIDORS
• PREDICTION OF TRAFFIC FLOW BY AN ADAPTIVE PREDICTION SYSTEM
• SIMULTANEOUS OPTIMIZATION OF SIGNAL SETTINGS AND LEFT-TURN TREATMENTS
• TESTING AND FIELD IMPLEMENTATION OF THE MINNESOTA VIDEO DETECTION SYSTEM (AUTOSCOPE)
• TRAFFIC CONFLICT VALUES FOR THREE-LEG, UNSIGNALIZED INTERSECTIONS
• TRAFFIC SIGNAL DELAY MODEL FOR NONUNIFORM ARRIVALS
• WASHINGTON STATE UNIVERSITY PARKING ACTION PLAN--A CAMPUS PARKING CASE STUDY