While people have pointed out that Google Maps will give correct directions, it's not as if Google Maps didn't have issues of its own; it's to be expected any mapping app will have some issues. Google Maps still falls flat on its face, like any sat-nav system, on new or altered road systems such as new junctions, one-way restrictions etc.
This is why drivers shouldn't be so stupid as to rely entirely on a system that is capable of being wrong; have a look at another map before making the journey, and oh I dunno, look at the damned road signs once in a while. I've yet to go to an airport that hasn't had an abundance of road-signs directing people where to go but if you, as the driver, choose to follow a map on your phone instead of looking at the road then you've only yourself to blame.
Seriously, since when did these mapping tools replace the human driver rather than just being the aids that they're designed to be? These things are no different than directions given to you by a passing stranger; they could be wrong, or the actual roads could look very different in reality than they do on a map, so use your ****ing eyes, not just your iPhone. I mean, these people may as well be driving with their eyes closed as they apparently don't use them, so anyone issuing a complaint should have their licenses immediately suspended. Yes Apple should fix this, but it's a mistake on their part, or the part of whichever service they get their data from, but drivers are more responsible for their own foolishness.