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Fig. 11.3
Clavileño in the final Cybercas2 exhibition in La Rochelle
manage high risked maneuvers, like advancements involving three vehicles in road
of two lanes with double sense circulation and frontal traffic. In risked maneuvers it is
indispensable a reliable communication in real time. In this way, the communication
between vehicle and Infrastructure (V2I) serves to coordinate vehicles in advance to
avoid collisions and to improve the traffic fluency. InMilanés et al. (
2012
) an approach
to an intelligent traffic management is addressed by means of a fuzzy control that
takes into account the clearance between vehicles and adjusts the velocity to avoid
collisions and increase the traffic flow. The reliability and rapidity of transmission
of the messages generated by the algorithm that establishes the passing priorities of
four vehicles in converging in a road crossing has been tested in the CAR facilities.
The paper (Milanés et al.
2011b
) deals with the necessity of a communication
between vehicles reliable and fast. Many urban accidents are because driver reac-
tions are not as fast as sudden stops need. To cope with this problem the automatic
controllers emphasizes the quick detection of the vehicle intentions by vision cam-
eras, radars or lasers. Nevertheless this detection is not enough, if there is risk of
collision the direct communication between cars is essential. For instance, when a
car has to brake suddenly it has to broadcast its position to all the vehicles running
into the area of influence. The approach explained in Godoy et al. (
2012
) has been
tested experimentally for a vehicle and besides has been analyzed theoretically for
the case in which a lot of vehicles were involved.
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