By subway (A, C, F): Get off at Jay Street/Borough Hall station. If you came from Manhattan, walk towards the rear of the train and up the last stairway. Continue straight through the turnstiles and up the rearmost stairway. When you emerge out of the station, Jay Street and the Marriot Hotel will be behind you, and Polytechnic University will be to your left.
By subway (1, 2, 4, 5): Get off at Borough Hall, walk down Willoughby Street, turn left onto Jay Street, and walk about two blocks.
By subway (M, N, R): Get off at Lawrence Street/Metrotech Center. Walk down Lawrence Street away from Willoughby Street. You will enter the main plaza of Metrotech Center. The Jacobs/Rogers building will be on your left and the Dibner Library Building will be straight ahead.
By train (LIRR): Take the train to Flatbush Avenue. Walk down Flatbush Avenue, turn left at the Fulton Mall, and right on Jay Street.
By car (from Manhattan or New Jersey): Go across the Brooklyn Bridge. Stay to your left. Turn left at the first light onto Tillary Street and a right at the first light onto Jay Street.
By car (from other directions): Take the Brooklyn-Queens Expressway and get off at the Tillary Street exit. Go up Tillary Street and turn left onto Jay Street.
Parking: There is parking underneath the Marriot Hotel (labelled "Renaissance Plaza" on the map) on Jay Street, across from Polytechnic University. The cost is $10. There is also parking in the KeySpan (formerly Brooklyn Union Gas) building on Jay Street, next to Polytechnic.