00334164

Component

http://onlinepubs.trb.org...s/trr/1980/772/772-011.pdf

http://scholar.google.com...taro&publication_year=1980

As part of an effort sponsored by the Federal Highway Administration (FHWA) to revise and update procedures for freeway capacity analysis, the weaving-area methodology developed as a result of National Cooperative Highway Research Program (NCHRP) Project 3-15 was revised with two objectives in mind: (a) to recalibrate the procedure to reflect modified service-volume concepts developed in other parts of the FHWA effort and (b) to simplify the structure of the NCHRP procedure to make it easier to apply and understand while retaining its demonstrated accuracy and sensitivity to lane configuration, a major factor in highway operations. The revised method was developed by using standard multiple regression techniques and a data base consisting of results of the 1963 U.S. Bureau of Public Roads study of weaving-area capacity and the results of extensive data collection on NCHRP Project 3-15. The procedure consists of calibrated relations governing (a) the operation of nonweaving vehicles in weaving areas, (b) the maximum number of lanes that can be occupied by weaving vehicles for various configurations; (c) the "share", or percentage, of weaving-area lanes occupied by weaving vehicles under "balanced" operation; and (d) the relation between the average speed of weaving vehicles and that of nonweaving vehicles. To simplify the application of these relations in design and operational analysis, a series of nomographs has been developed. (Author)

Publication of this paper sponsored by Committee on Highway Capacity and Quality of Service. 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.

01411592

pp 58-65

1980

Transportation Research Record

59th Annual Meeting of the Transportation Research Board

0309031168

Web

Figures (6) ; References (6) ; Tables (1)

Calibration; Data collection; Freeways; Highway capacity; Motor vehicles; Nomographs; Shape; Speed; Traffic lanes; Traffic simulation; Traffic speed; Weaving sections

Configuration

Highways; Operations and Traffic Management; I71: Traffic Theory

TRIS, TRB

Oct 28 1981 12:00AM

• CHANGES IN TRAFFIC SPEED AND BUNCHING NEAR TRANSITION POINTS BETWEEN TWO- AND FOUR-LANE RURAL ROADS (ABRIDGMENT)
• DETERMINING THE LATERAL DEPLOYMENT OF TRAFFIC ON AN APPROACH TO AN INTERSECTION
• DEVELOPMENT OF A NEW TRAFFIC-FLOW DATA-COLLECTION SYSTEM (ABRIDGMENT)
• DEVELOPMENT OF A TRANSYT-BASED TRAFFIC SIMULATION MODEL (ABRIDGMENT)
• DEVELOPMENT OF MODIFIED PROCEDURES FOR ANALYSIS OF RAMP CAPACITY
• EFFECT OF ON-STREET PICKUP AND DELIVERY ON LEVEL OF SERVICE OF ARTERIAL STREETS
• GENERALIZED PROCEDURE FOR ESTIMATING SINGLE- AND TWO-REGIME TRAFFIC-FLOW MODELS
• HEADWAY-DISTRIBUTION MODELS FOR TWO-LANE RURAL HIGHWAYS
• HYBRID MACROSCOPIC-MICROSCOPIC TRAFFIC SIMULATION MODEL (ABRIDGMENT)
• PROJECTED VEHICLE CHARACTERISTICS THROUGH 1995
• SERVICE RATES OF MIXED TRAFFIC ON THE FAR LEFT LANE OF AN APPROACH
• TRAFLO: A NEW TOOL TO EVALUATE TRANSPORTATION SYSTEM MANAGEMENT STRATEGIES