The benefits can further increase if the public-transport-oriented policies are combined with the car-deterrence policies. This combination of these policies would also prove successful for middle-size and smaller cities. The availability of public transport, as an alternative to car mobility, attracts motorists to give up their cars for urban transfers. This relation is the stronger the larger and more congestion-prone an urban area is, although this rule can also apply to main traffic corridors for mid-size and smaller cities.