 Most notable is the Tyne and Wear Passenger Transport Authority, which co-ordinates transport policy.Through its passenger transport executive, known as Nexus, it owns and operates the Tyne and Wear Metro light rail system, and the Shields ferry service and the Tyne Tunnel, linking communities on either side of the River Tyne.Also through Nexus, the authority subsidises socially necessary transport services (including taxis) and operates a concessionary fares scheme for the elderly and disabled.