VBZ: Röntgenstrasse 32
Militär-/Langstrasse 31, 32

If you set out to walk from the Kreis 4 district to the Kreis 5 district, you’ll normally have to go below ground. And if you take one of the two grey tunnels between Lager- and Zollstrasse, you’re best advised to stay on your guard. Because cyclists and pedestrians often stray o  the marked paths and invariably end up yelling at each other. So, if you have to use the underpass, be sure to let your eyes wander too.