From the main train station (Aachener Hauptbahnhof):
Enter the Bahnhofstraße opposite to the main station. Follow this street to the next crossing (Theaterstraße). Go to the bus stop Wallstraße at the opposite side of the Theaterstraße. Take the bus line 33 with destination Vaals (NL) über Klinikum. Leave the bus at the Halifaxstraße. The Center for Computer Science is the large building on the left. (Other bus lines to the Halifaxstraße are lines number 15/23/65/75, direction Physikzentrum / Hörn).
From the train station Aachen West (relatively few trains pass this way):
From the Republikplatz in front of the train station turn right, then walk through the tunnel that passes beneath the railway tracks into the Seffenter Weg. Follow this street up to the first T-junction (about 300 m), then turn left into the Mies-v.d.-Rohe Straße. Walk this street up to its end (about 500 m). The last large building on the right is the Center for Computer Science (entrance marked Informatik). The entire walk takes about 10 min. You can also take the bus (line number 33 as described above).
Coming from Cologne (A4), Düsseldorf or Belgium (A44):
Follow the signs at interchange Aachener Kreuz in the direction Heerlen (on the A4). Continue as in item 2 below.
Coming from the Netherlands or from the Aachener Kreuz (A4):
Leave the highway at exit Aachen-Laurensberg. At the traffic lights head in the direction Aachen. Turn right into the Toledo Ring (Klinikum sign). Take the third exit from the ring into the Halifaxstraße. Turn left at the forth crossroads into the Mies-v.d.-Rohe Straße. On the left, you will find an entrance to the parking lot behind the Center for Computer Science.
The Chair for Computer Science 11 (“Lehrstuhl für Informatik 11”) is located in the building H on the 3rd floor (see second map below).