• From Bochum, Essen or Düsseldorf
  Stay on the A40 direction Dortmund/Kassel – this is the extension of the B1. Continue: see below!
  
  
• From Recklinghausen
  Stay on the A43 or A45 several miles, direction Frankfurt. Follow signs Dortmund. Go straight at Dortmund-West, soon you will get through an underpass B54 right near the TV tower, there is another short tunnel, take left lane. Continue: see below!
  
  
• From Frankfurt or Cologne
  Take turnoff direction Dortmund at highway intersection Westhofener Kreuz, turn off at B54 ... Dortmund. Get close to TV-tower and turn right on to B1, toward Kassel/Unna. Go about 2 miles direction Unna, and take left lane right after a short tunnel. Watch for "McDonald's", "Citroen", and a large office building with the letters "HARPEN". Turn left and pass through between HARPEN. Soon the large pyramid will catch your eye.
  
  
• From Hannover
  Take the A1 from the highway intersection Kamener Kreuz, go south until you get to the intersection Dortmund/Unna, follow signs toward Dortmund (Airport), you are now on the A44; it changes its name into B1 (yellow signs). Continue: see below!
  
  
• From Kassel
  Pass through the highway intersection Dortmund/Unna and follow signs Dortmund (Airport), do not turn off at exit Airport. Stay on the A44, at the exit Holzwickede/Airport (the signs turn yellow), and this road is called B1 from here on. Go straight, past the exits airport and B236. Soon you will see the Hotel "Wittekindshof", followed by the "Sparkasse" (a bank), a church and an "ARAL"-filling station. The large office building "HARPEN" comes into view, this is where you should turn right.

A block or two later, the pyramid will catch your eye. Check this text with the simplified map above. Go through the large entrance and find our office in the atrium, to the right of the pyramid.