Two hundred valid interviews were carried out on car users within a radius of 500m around the area where the underground car park would be constructed. The choice of the survey area was due to the small size of the town and justified by an origin–destination survey performed in Santon ˜a, which found that the average person travelling on foot did not walk more than 500m. This area was divided into zones for the stated preference survey. Zone 1 was where the underground car park would be constructed (and zone 2 limits the area where street parking would be banned (within a radius of 500m around the car park).