The StVO § 20 Abs. 4 prescribes:
"(..) (4) Buses and designated school buses stopping at stops (sign 224) and having switched on the hazard warning lights shall only drive past at walking pace and only at such a distance as to preclude any danger to passengers The pace of walking also applies to oncoming traffic on the same lane, and passengers are not allowed to be obstructed, and if necessary, the driver must wait. "