T-way or a transitway is a bus rapid transit line in the western suburbs of Sydney, Australia. T-ways are bus-only roads where undeveloped railway and motorway corridors are available, and bus-only lanes on existing roads. T-ways were conceived as an alternative to commuter railway services because of the lower cost and higher flexibility that they offer. T-ways can be constructed without the need for a dedicated corridor or tunnel. Buses can join and leave the T-way along the route, giving the T-way a wider feeder area than rail.