Decision support system for road traffic management can be used
	for freight transport, people transport but also for site evacuation. We
	deal with two aspects of the decision support system in a same global
	architecture: one for road users to choose the shortest path in time
	between two points and the other for road traffic management to regulate
	the traffic and to avoid jam. These two aspects interact. The cartography
	is represented by a weighted digraph. The weights evolve according to the
	traffic and the graph is therefore dynamic. The search of the shortest path
	is based on an ant algorithm because it is well suited for dynamic
	environment. The regulation system is based on a neural network.