São Paulo has a similar system in place since 1996, where each vehicle has one day a week where they are banned from using the roads during peak times. My unde

São Paulo has a similar system in place since 1996, where each vehicle has one day a week where they are banned from using the roads during peak times. My understanding is that it doesn't really help that much because even with the rationing the tendency is still to saturate the roads with cars. São Paulo is one of the cities with the worst traffic congestion in the world. Additionally, rich people can bypass the rationing by purchasing additional vehicles.