Abstract
An important goal in the field of intelligent transportation systems (ITS) is to provide driving aids aimed at preventing accidents and reducing the number of traffic victims. The commonest traffic accidents in urban areas are due to sudden braking that demands a very fast response on the part of drivers. Attempts to solve this problem have motivated many ITS advances including the detection of the intention of surrounding cars using lasers, radars or cameras. However, this might not be enough to increase safety when there is a danger of collision. Vehicle to vehicle communications are needed to ensure that the other intentions of cars are also available. The article describes the development of a controller to perform an emergency stop via an electro-hydraulic braking system employed on dry asphalt. An original V2V communication scheme based on WiFi cards has been used for broadcasting positioning information to other vehicles. The reliability of the scheme has been theoretically analyzed to estimate its performance when the number of vehicles involved is much higher. This controller has been incorporated into the AUTOPIA program control for automatic cars. The system has been implemented in Citroën C3 Pluriel, and various tests were performed to evaluate its operation.
Highlights
The trend towards future road transport is a move from simple driving aids to automatic driving controls
We propose a V2V communication system based on broadcasting positioning information over WiFi
A system based on V2V communication and electrohydraulic braking to take over control of the car in the case of an unexpected situation has been presented
Summary
The trend towards future road transport is a move from simple driving aids to automatic driving controls. The goal is to attempt to reduce the number of collisions, or at least to mitigate their consequences (Prentkovskis et al 2010a, 2010b; Sokolovskij et al 2007; Černiauskas et al 2010). Factors such as poor visibility of other users, not maintaining a safe distance, or ignoring traffic signals are some of the main causes of accidents Considering different solutions to the above proposed problems, the development of autonomous vehicles is a open field of discussions today
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