Oxford Buses covers the fleets of Oxford Buses, Carousel & Thames Travel.
Routes prefixes are ob for Oxford buses, cr for Carousel and th for Thames Travel.
Oxford employs branding on most of its routes. The brand applied to a vehicle will be shown by a letter next to the fleet number. Generic (non branded) buses just display without a brand letter. Current brands are :-
| a = | Airlink | |
| b = | Brookes Bus | |
| c = | Connector | |
| e = | City Sightseeing | |
| f = | Purple | |
| g = | City 6 | |
| h = | Chiltern Hundreds | |
| j = | City 35 | |
| k = | Park & Ride | |
| l = | Harwell Fast | |
| m = | City 15 | |
| o = | City 8 & 9 | |
| p = | City 5 | |
| r = | River Rapids | |
| s = | Carousel | |
| t = | Thames Travel | |
| w = | City 2 | |
| x = | City X3 | |
| y = | City 3 | |
| P = | PickMeUp | |
short codes specific for Oxford Companies are :-