Or a road has a new road layout. The lanes have moved around. Perhaps a two way street has become a one way street. This is clearly signposted. Can your car read these signs? Will it just dumbly drive up the street the wrong way until someone thinks to update the map?
Why do you have the impression that computers these days can still only do the same things they did in the 90s?
Yes, the car can read the signs, easily. It's trivial for it to see the sign that says "one way, do not enter" and to recalculate its route. It's also easy for the first car that spots the sign that doesn't match its map to update other cars and let them know what's going on.
And, why wouldn't it have a special bus queue length algorithm, if that was important to know? How hard of an algorithm would it be? It could even query the average wait time for a particular bus stop and adjust to be even more precise. I bet it could predict the waiting time better than you would.