The large bus seasonal student population ensures that the services are well patronised during the semesters that the University operates through. In addition to the standard routes, there is a system of Park & Ride routes that operate from car park's on the outskirts of town and operate to the city centre using a fleet of green Dennis Trident Double Deckers. The fleets of the route operators consist of the standard variety seen in many other cities in the UK - Dennis Tridents and Darts, together with the increasing number of Volvo's, Mercedes Citaro's and MAN's and are mostly low floor, front-door only vehicles.
Oxford is of course well served by rail with direct and connecting services via Reading to London Paddington. There is also the competing Oxford Tube road service (also owned by Stagecoach) via the A40 Motorway to London Victoria that operates every 10 minutes and costs £11 one way/£13 return at the time of writing. It's an interesting alternative to the railway.