The route, supported by the city council, replaced a route withdrawn by another operator, but was initially found not to be commercially viable.

The route did not directly replace any auto trail, instead combining portions of many into one continuous route.

The route will replace the nearby Yandell Drive overpass across I-10, and the project includes the demolition of the older bridge.

This route replaced Metrobus Q4 in the early 1990s.

This route replaced Metrobus Y4 in 1998.

This route replaced the former Georgetown Metro Connection "blue bus."

This route replaced the discontinued Metrobus N22 line.

Peel, the airports owners said that "these extra routes would replace the loss of the EasyJet flights".

This route will in effect replace the parallel section of the New England Highway.

The bus connection and route replaced a tram service which closed in 1954.