That's whats great about OMSI; it's not just the main roads of the route. There are a reasonable amount of other adjacent roads in the map
I use the road in question (between Falkenseer Ch. and Galenstr.) as part of a fictitious "X92" route that runs from the Rathaus up past Galenstr./S-Bahn Spandau West, then up that road and up to Westerwaldstr.
There's also a whole network of roads off Freudstr. ...firstly Siegener Str. area, then further up around Spektefeld.
In fact most of the modern day 92 (M37) journeys actually turn off Falkensee Ch. now and goes around the Spektefeld arc before coming back onto the main road and terminating at Freudstr. or the Waldkrankenhaus (Hospital).
This additional part of the route can be driven in OMSI as the roads are modelled