however the initiative has proved so successful that since early car free days have been held every sunday in all five of jakartas municipalities vehicles were required to possess paper based permits to enter the km zone with exceptions made for public transport public taxis emergency diplomatic and military vehicles however difficulties in enforcement meant that as much as per cent of vehicles entering the zone were unauthorized with only per cent caught and fined by police to address these enforcement issues and coupled with improvements to public transport services the city developed an enforcement system based on automated number plate recognition cameras positioned at each of the road entrances to the restricted zone the system automatically identifies vehicle registration numbers that have not paid for an annual weekly or daily pass and subsequently sends out violation notices by comparison a single ticket on the tehran brt ranges from rial s to