Control the entrance of the cars in the center of the city, in order to have less cars in the center of the city. This contributes to a safer for pedestrians city with better environment and less noise. Using RFIDs on the cars, when enter the center of the city, in order to calculate the fee. In this way, there will be no delays on "entrances" where you use machines to pay for entering the center, No delays, no traffic congestion.