I feel bad (but not sorry) for the folks who got lost in Chicago and missed their train. Often, those who live in smaller towns forget the 5 P's, because they have a good grasp of everything and everyone in their smaller communities.
The 5 P's: Proper Preparation Prevents Poor Performance.
And then, there's Tom's Rule for Arrival: Early is on time. Exactly on time is potentially late. Late is not acceptable.
So, the 5 P's and Tom's Rule would require reviewing the route on GPS in advance and calculating the running time to arrive at the station, plus potential delay for a flat tire, traffic ticket, rental car return, and road congestion. Then the departure time for the station would be calculated and everybody would be notified that they would leave on time for the station, regardless of personal grooming or any other consideration not involving blood, vomit, or lower digestive distress. If everything went well, they would have arrived early. If GPS conked out, they would have the route saved in the GPS and could still get the turns and streets. This stuff is extra important in big cities like Chicago.
Tough lesson for those folks, but the GPS just did what it was designed to do within its design limitations, and they will hopefully live the rest of their lives without being left behind again. I am not cold-hearted about hearing this - just realistic - and wish them happier travels from now on, by adhering to the 5 P's.