Coming from the 403 from the Toronto or Niagara directions: From the QEW, take the 403 exit to Hamilton. Once in Hamilton take the Main Street West exit. At the traffic lights at the top of the exit ramp turn left onto Main Street West. (jump to Main Street directions below)
Coming from the 403 from the London direction: once in Hamilton take the
Aberdeen Street exit onto Longwood. Proceed along Longwood Road and turn
left onto Main Street West. (jump to Main Street directions below)
Proceed west on Main Street West (just a few blocks) until you see the
McMaster Health Science Centre and hospital on your right, and you'll soon
come upon the main entrance to the university.
Turn right into campus, and then take the left turn to the parking kiosk.
On the corner just to the left of the parking kiosk is the Psychology Building (brown brick).
The kiosk attendant will direct you to the parking lot, and it is a short walk
from there back to the Psychology Building.
Here are some additional directions to the university: How to find us (from the McMaster University home page)