Take any New Jersey Transit or Amtrak train going to PRINCETON JUNCTION. (Many Amtrak trains do not stop at Princeton Junction; please read the schedule carefully.) From Princeton Junction you can ride to Princeton University (3 miles) on the Dinky (Princeton to Junction or Junction to Princeton), a shuttle train that arrives at the Alexander Road Station, located on the edge of the University campus. After arriving in Princeton at the bottom of campus, you can take a five-minute taxi ride up to the main part of town or walk across the campus to the Computer Science Building (about half a mile)by walking along Alexander Street towards Nassau street. Turn right and follow to Olden Street. Make a right to the corner of William and Olden Street for the CS Department entrance. Taking a Taxi is recommended here. .