A large number of European towns and cities have made their city centres car-free since the 1960s. These are often accompanied by car parks on the edge of the pedestrianized zone, and in the larger cases, park and ride schemes. Central Copenhagen in Denmark is one of the largest and oldest examples: the car free zone is centered on Strøget, a pedestrian shopping street, which creates a very large auto free zone. This example of reduction in the use of cars means that there is a large beneficial effect on the amount of emissions released to the atmosphere. These policies however do allow delivery and service vehicles as well as residents cars into exclusion areas. “This lock out of unnecessary car traffic must be an isolated measure, but part of a pull and push approach” (H, Topp and T, Pharaoh, 1994).