This path is indoors and should be split. On the west side (Neudorffstrasse) is level 0, where coop, Bundy's Cafe and Kantonalbank are located. On the east side (to the train station) at level -5 (sic!) is the bus stop and a ticket center. In between are 3 levels of parking lots and some other level (see attached photo)

via StreetComplete 45.2

Attached photo(s):
https://westnordost.de/p/108577.jpg