Would it be better if cars are banned in the metro-cities? This would reduce all traffic problems, pollution problems, and excessive use of gas in the big cities, *1. There can be designated parking spaces outside the cities accessible through public transit so that people can commute outside their city. 1: Personally, I always notice that most of the cars have only one passenger even though many of these cars go in same directions. I am not sure if there are some statical study on average number of passengers in a car and number of cars that share similar departure and destination.