Development of the New Polish Method for Capacity Analysis of Motorways and Expressways

Archives of civil engineering

article

Piotr Olszewski¹  Tomasz Dybicz¹  Wojciech Kustra²  Aleksandra Romanowska³  Kazimierz Jamroz²  Krzysztof Ostrowski⁴ 

[1] Warsaw University of Technology, Faculty of Civil Engineering;Gdansk University of Technology, Faculty of Civil and Environmental Engineering;Gdansk University of Technology Faculty of Civil and Environmental Engineering;Cracow University of Technology, Faculty of Civil Engineering

关键词: capacity analysis;    motorways;    expressways;    Van Aerde model;    free flow speed;    level of service;   

DOI  :  10.24425/ace.2020.135231

学科分类：建筑学

来源: Polska Akademia Nauk * Instytut Podstawowych Problemow Techniki / Polish Academy of Sciences, Institute of Fundamental Technological Research

【 摘 要 】

The paper presents development of the new Polish method for performing capacity analysis of basic segments of dual carriageway roads (motorways and expressways). The method is based on field traffic surveys conducted at 30 motorway and expressway sites (class A and S roads) in Poland. Traffic flows, composition and travel times were observed in 15-min intervals at each site using ANPR filming method. These data were used to calibrate a family of traffic speed-flow relationships for different roads, based on Van Aerde model. Free flow speed of traffic and road class are the basic parameters defining the speed-flow relationship and the value of capacity per lane in pcu/h. Traffic density was adopted as the measure of effectiveness for defining the level of service. The paper describes derivation of formulae for estimation of free flow speed for different types of roads as well as determination of equivalent factors for converting vehicles to passenger car units. The method allows us to determine capacity and the level of service based on existing or forecasted traffic flow.

【 授权许可】

Unknown