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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
Author(s)
Andres L. Jimenez1 and Alvaro Rodriguez-Valencia2
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DOI:10.17265/2328-2142/2016.05.007
Affiliation(s)
1. Independent consultant
2. Department of Civil and Environmental Engineering, Universidad de los Andes, Bogotá 111711, Colombia
ABSTRACT
Bottlenecks have been widely studied for uninterrupted flow. The study
of bottlenecks in urban traffic networks implies a challenge, since delays and
queuing are implicit in interrupted flows. The objective of this paper is to
discuss bottlenecks in urban traffic networks and present a methodology to
identify them, based on GPS (Global Position System) data from taxis in Bogotá, Colombia. In networks, where stops are frequent, the principle we adopted deals
with finding recurrent low-speed sections, beyond expected delays. Urban
bottlenecks occur in those road network segments that perform poorly in terms
of speed, compared with upstream and downstream conditions, producing recurrent
and larger than normal delays. The GPS devices reported, via GPRS (General
Packet Radio Service), information every 10 s. Results of this exploratory
project are promising. The method allowed the identification of six urban
bottlenecks out of seven randomly selected low-speed sections. The most
valuable application of this methodology is the prioritization of resources
investment in traffic infrastructure improvements. As a low cost option, this
exploratory method might be especially attractive in identifying critical
points in traffic networks in developing cities, without expensive
traffic-monitoring systems.
KEYWORDS
Urban bottleneck, bottleneck, road network, GPS, congestion, investment prioritization, traffic performance.
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