Braunschweig is conveniently located for the federal motorways: the A 2 running from east to west (Berlin-Ruhr Area) and the A 39 going from north to south (Braunschweig-Salzgitter).

• Coming from Dortmund (A 2): Exit the motorway at “Braunschweig-Watenbüttel”. Turn right, following the signs towards Braunschweig. In Watenbüttel, turn right at the second set of traffic lights. Look out for the Rewe and Penny car parks in front of you on the right. After approx. one kilometer, you will see PTB’s entrance area on your left.
  
  
• Coming from Berlin (A 2): At the “Braunschweig-Nord” interchange, take the A 391 towards Kassel. At the “Ölper” interchange, take the A 392 towards Celle/BS-Watenbüttel. Follow the B 214 (signposted: A2/Hannover/Celle/BS-Watenbüttel). At the traffic lights, turn left onto Hans-Jürgen-Straße. Look out for the Rewe and Penny car parks on your left. After approx. one kilometer, you will see PTB’s entrance area on your left.
  
  
• Coming from Kassel (A 7) and Salzgitter (A 39): Coming from Kassel, take the A 39 towards Berlin/Braunschweig at the “Salzgitter” interchange. Change onto the A 391 at the “Braunschweig-Südwest” interchange. Exit the motorway at “Braunschweig-Lehndorf”. Turn left towards Lehndorf and follow this road for approx. 3 km. When you reach the edge of the district of Braunschweig-Kanzlerfeld, turn right onto Bundesallee. After approx. 2 km, you will see PTB on your right.

The long-distance bus station is located right next to Braunschweig Main Station (with an ICE train stop).

To reach the Physikalisch-Technische Bundesanstalt (PTB) from Braunschweig Main Station, you can take a taxi (approx. 15 minutes) or use public transportation (approx. 30 minutes). 

Bus schedules of Braunschweiger Verkehrs-AG.

Braunschweig Main Station, local bus stop A:

Bus number 461 to "Lehndorf, PTB". Leave the bus at the "PTB" bus stop. The bus stop is located right in front of the main entrance to PTB. Since the PTB site is very large, you will want to plan enough time for walking to your final destination. Alternatively, you can ask your host to pick you up at the main entrance.

Bus schedules of Braunschweiger Verkehrs-AG.

• From Hanover Airport to Hanover Main Station. Continue your journey by train to Braunschweig (ICE, IC and RE train connections).

Continue to PTB as described in "Public transportation in Braunschweig".

• From Berlin-Airport (BER) to Berlin Main Station. Continue to Braunschweig by train or by long-distance bus (ICE, IC- und RE connections).

Continue to PTB as described in "Public transportation in Braunschweig".