Göttingen as a model for Oxford?
I spent four days in Göttingen over the summar, and its transport system makes an interesting parallel to Oxford.
Göttingen is also a university town, with maybe two thirds to three quarters the population of Oxford. It lacks geographical constraints as severe as the rivers are for Oxford, but does have a mountain ridge coming in on the east (and hence only a partial ring-road). It also has narrow medieval streets (it wasn't that badly bombed during the war). And it has high cycling rates and a public transport system that is largely dependent on buses -- there is no tram or metro system, and as with Oxford the railway system serves longer distance trips.
Göttingen bus network