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 = | The Airline | |
| b = | Brookes Bus | |
| c = | Connector | |
| d = | Electricity | |
| e = | City Sightseeing | |
| f = | Flightline | |
| g = | City 6 | |
| h = | Chiltern Hundreds | |
| j = | Thame 280 | |
| k = | Park & Ride | |
| l = | Harwell Fast | |
| m = | Purple | |
| o = | Orange | |
| p = | City 5 | |
| r = | River Rapids | |
| s = | Carousel | |
| t = | Thames Travel | |
| v = | The One | |
| w = | Carousel Country | |
| x = | City X1 | |
| y = | Yellow | |
| D = | Dark Blue | |
| G = | Grey | |
| I = | Silver | |
| P = | PickMeUp | |
| T = | Trainer | |
| W = | White | |
short codes specific for Oxford Companies are :-