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Optimal distribution of traffic flows in emergency cases

Published online by Cambridge University Press:  12 April 2012

R. MANZO ,
B. PICCOLI  and
L. RARITÀ
R. MANZO
Affiliation:
Dipartimento di Ingegneria Elettronica e Ingegneria Informatica, University of Salerno, Fisciano (SA), Italy email: rmanzo@unisa.it, lrarita@unisa.it
B. PICCOLI
Affiliation:
Department of Mathematical Sciences, Rutgers University, Camden, NJ, USA email: piccoli@camden.rutgers.edu
L. RARITÀ
Affiliation:
Dipartimento di Ingegneria Elettronica e Ingegneria Informatica, University of Salerno, Fisciano (SA), Italy email: rmanzo@unisa.it, lrarita@unisa.it
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Abstract

The aim of this work is to present a technique for the optimisation of emergency vehicles travel times on assigned paths when critical situations, such as car accidents, occur. Using a fluid-dynamic model for the description of car density evolution, the attention is focused on a decentralised approach reducing to simple junctions with two incoming roads and two outgoing ones (junctions of 2 × 2 type). We assume the redirection of cars at junctions is possible and choose a cost functional that describes the asymptotic average velocity of emergency vehicles. Fixing an incoming road and an outgoing road for the emergency vehicle, we determine the local distribution coefficients that maximise such functional at a single junction. Then we use the local optimal coefficients at each node of the network. The overall traffic evolution is studied via simulations, both for simple junctions or cascade networks, evaluating global performances when optimal parameters on the network are used.

Keywords

Conservation lawstraffic problemsoptimal redistribution of flows
Type
Papers
Information
European Journal of Applied Mathematics , Volume 23 , Issue 4 , August 2012 , pp. 515 - 535
Copyright
Copyright © Cambridge University Press 2012

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