The various parts of the urban transport system, such as bus services, traffic control systems and parking areas are designed and controlled by various independent organisations. Competitive pressures, institutional and legislative obstacles may inhibit integrated or co-ordinated working, leading to sub-optimal efficiency of the system as a whole. Services may be excessively duplicated, and policies to promote collective transport, such as combining higher quality bus services with bus priority measures and parking payment systems may be hindered. Therefore, the greater integration of actors such as local authorities, fleet operators and technology providers is an important goal.