Effects of dynamic speed limit strategies on capacity at freeway bottlenecks
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Tipus de documentTesina
Data2013-11-28
Condicions d'accésAccés obert
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Reconeixement 3.0 Espanya
Abstract
The objective of this Thesis is to understand the situation of a catalan highway with VSL strategies through
empirical data of one day. It will be done using standard traffic tools to make the congested and uncongested
states analysis. The Thesis will involve: visual identification of congested areas, bottleneck detection and
diagnostic, identification of fundamental diagrams, lane density and speed distribution and comparison
between speed limits and measured speeds.
In addition, it will give recommendations and establish the basis for a future set of experiments to investigate
VSL strategies in deep.
The main findings are the detection of five bottlenecks, many lane changes near the ramps and the change of
occupancy distribution between lanes in congested periods. After a careful and detailed analysis of the data we
can conclude that VSL is not as effective as it should be. That is caused by the algorithm it uses and the fact that
drivers disobey speed limits.
Descripció
Projecte realitzat en el marc d’un programa de mobilitat amb Eidgenössische Technische Hochschule Zürich
TitulacióENGINYERIA DE CAMINS, CANALS I PORTS (Pla 1995)
Fitxers | Descripció | Mida | Format | Visualitza |
---|---|---|---|---|
Memòria.pdf | 3,455Mb | Visualitza/Obre | ||
Anexes.pdf | 6,218Mb | Visualitza/Obre |