Buses Local buses offer access to campus from nearby towns not directly connected to the regional rail network. Trains Princeton University is highly connected by frequent rail service to the northeast region. TigerTransit Free, frequent, and accessible public shuttles to move around campus and local destinations. Public transit connections Whether you are a visitor to campus or a regular commuter, it is easy to get to Princeton University by bus or train. Flying to New Jersey? Consider the train from Newark Airport or Philadelphia International Airport.