Modelling a Car Safety Controller in Road Tunnels using Hybrid Petri
Nets
A. Bobbio, M. Gribaudo, A. Horváth
Abstract:
In the last years, major accidents have occurred in road tunnels
with human losses (e.g. Mont Blanc, March '99, St. Gotthard,
Oct '01 and Frejus, June '05). The accidents have caused a large
debate on how to increase road tunnel safety. One way to reduce risk is to
minimize the undesired disturbances of the traffic flow by forcing vehicles
to respect speed limits and safety distances. This paper investigates this
specific issue and proposes a hybrid modeling approach based on fluid Petri
nets (FPN). An FPN is used to represent a controller that keeps track of
two consecutive vehicles, controls their speed and distance and issues
alarms when the prescribed limits are violated. In the second part of the
paper, it is shown that FPN is a valid paradigm to model the dynamics of a
car in a detailed way.
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András Horváth, 2008-06-25