The University of York is easily accessible from the City of York by bus. GeoURL
A map showing the location of the University is given below.
How to find the conference venue and accommodation: http://www-users.york.ac.uk/~kf7/pdf/accommodation.pdf
How to find the computer room (Derwent D114) from Vanbrugh: http://www-users.york.ac.uk/~kf7/pdf/derwent.pdf
Other campus maps are available for the University of York Web site.