[1] During peak times a shorter Red CAT travels between the Forrest Place stop opposite Perth railway station and the West Perth stop as bus route number 4 to meet high demand for travel between these.

[1] Intended to ease congestion in the central business district,[9] the Green CAT does not run on weekends nor on public holidays.

The Purple CAT commenced on 27 February 2022, and runs between the University of Western Australia and Elizabeth Quay Bus Station via the Queen Elizabeth II Medical Centre as bus route number 6.

[10][11][12][13] It runs Monday to Friday around the Joondalup central business district as bus routes 10 (anticlockwise) and 11 (clockwise).

Originating in 1997 as the Fremantle Clipper, it only operated on weekdays and public holidays with a 15 minute frequency.

The contract to run the service was awarded to Path Transit, which was part of the Australian Transit Enterprises (now Keolis Downer) ownership, using their own (not PTA purchased) low-entry, Volgren CR221L-bodied, Dennis Dart SLF.

The service was reintroduced in August 2000 as the incumbent Fremantle CAT and upgraded to run seven days a week with a frequency of 8 to 10 minutes, using short wheelbase Volgren CR225L-bodied Mercedes-Benz O405NH's sporting dedicated orange livery and fleet numbers 1178, 1179 and 1180.

Following a funding reduction by the City of Fremantle as a result from the onset of the COVID-19 pandemic, the Red CAT service ceased operations on 15 August 2020.