Northwestern University

Coming on I-94 take the Old Orchard exit and follow Old Orchard Rd east all the way to Gross Point Road, which is a diagonal (SW-NE) street.
Turn half left onto Gross Point Rd
Turn right at next light onto Central St. Follow Central St. all the way to Ridge (passed the Evanston Hospital). Ridge is on a (little) ridge. Cross Ridge and Keep going straight.
Central ends when it hits Sheridan Rd. Turn right on Sheridan and follow Sheridan until Noyes (second traffic light).
To the left is the Technological Institute, a big massive structure with a U-shaped front. That`s the building. A parking lot is to the right.

Take Lake Shore Drive all the way to the end and then...
follow Sheridan Road to Evanston, i.e. keep right where Lake Shore Drive hits Hollywood. Sheridan Rd. takes a few corners: stay always as close to the lake as reasonably possible and follow all the other cars headed north, i.e. there are a few places where you have to go west for a bit but you always turn to the right (north) as soon as possible (e.g at Devon in Chicago, at South Blvd and Main St. in Evanston).
At one point the street makes again a left turn while straight ahead you see a sign "Northwestern University". That marks the relevant part of campus. You follow the street west to the light and head north again (Sheridan Rd merges with Chicago Ave) following Sheridan.
You pass one traffic light (at Foster). Just before the next traffic light (at Noyes) there is a parking lot to the left. To the right of the street is the Technological Institute, a big massive structure with a U-shaped front. That`s the building.

If the parking lot at Sheridan/Noyes is full you can either try to park for a moment on Noyes (2 hour limit) and take care of the car afterwards.
Alternatively, you turn right on Noyes and right again on Orrington and then right again on Lincoln (3 blocks north). You cross Sheridan and follow Lincoln. It takes you to a bigger lot further away from the Tech Inst. You probably want to enter Tech still from Sheridan Rd. since it is too confusing inside: go south on the parking lot until the end. You'll see the back of the Technological Institute. Go west to Sheridan along the northside of the Institute.

Take the train from downtown to Howard St. During rush-hours take the Evanston Express, which is above ground in the loop. The regular train starts below ground (State St.)
At Howard, change to the Evanston train (towards Linden) and get off at Noyes.
Go east to Sheridan Rd and there is Tech again (see above).

Enter through the center entrance from Sheridan Road.
Follow the green line on the map below to the stairway (blue for the elevator), and go to the 4th floor.
To the right in the lobby there is a monitor with a directory and a phone (the department phone number is 1-3345).