Conference Interactive Program
To view the 2013 Annual Meeting Interactive Program
TRB 91st Annual Meeting (January 22-26, 2012)
Taking Urban Data to New Heights: New Sources, New Techniques,and New Applications
Jan 24 2012 2:00PM- 3:45PM
Hilton, International Center
Nature and Causes of Urban Traffic Congestion: Case Study of London (12-2619)
This paper presents an empirical approach to investigate the nature and causes of urban traffic congestion. Compared with freeways, urban network traffic is relatively less studied due to its complexity and availability of required data. This paper introduces the data resources we have and the research we have been conducting to understand the characteristic of urban traffic in Greater London Area, UK. Our traffic data include journey time estimates from Automatic Number Plate Recognition (ANPR) system and GPS (Global Positioning System) equipped vehicles; traffic counts, incident records from London Traffic Information System (LTIS), and weather information from UK MET office. With the traffic data, we introduce the use of visualization to retrieve the spatio-temporal feature of urban traffic. We also present the use of linear regression model to diagnose observed congestion and attribute them to different causes. In particular, we distinguish the observed congestion into two main components: one due to recurrent factors and the other due to non-recurrent factors. The methodologies are illustrated through a case study of Greater London Area. It is found that about 15% of the observed congestion in the region is due to non-recurrent factors such as accidents, unplanned roadwork, special events, and strikes. The study presented herein will be valuable for transport policy evaluation and appraisal.
Chow, Andy H. F., University College London, United Kingdom
Santacreu, Alexandre , Transport for London, United Kingdom
Tsapakis, Ioannis , Texas A&M Transportation Institute
Tanaksaranond, Garavig , University College London, United Kingdom
Cheng, Tao , University College London, United Kingdom
Transportation Research Board. 500 Fifth St. NW, Washington, D.C. 20001
Copyright © 2012. National Academy of Sciences. All Rights Reserved.