sentences:  Customers have to actually show their pass(es) to the driver and enter the exact change into the fare box, because even on a change card, it's not possible to get change.CamTran passes can be used on CamTran+ buses, but customers must pay the difference, since the rural fares are more than the urban fares.CamTran+ passes can be used on CamTran (Urban) buses, since the rural passes actually pay more fare than the urban passes.