A popular tourist destinations for tourists is the Historical Park in Ayutthaya. As much of this is inaccessible to vehicles, the local police started an innovative scheme to help keep their citizens and foreign tourists safe. About three years ago they launched the Volunteer Police Bike Patrol. This is headed by two fulltime policemen and fifty five local volunteers. They each take turns to go out on patrols around the ruins of the ancient city. Volunteers work on shifts from 11 a.m. to 6 p.m. twice a week.