Had a somewhat similar scenario at an airport.

I wanted to go to the parking garage. It was a nice day out and it was right there. While there were a lot of lanes of traffic, they had cross walks, and pedestrian lights. The signs all said to go up two floors to the pedestrian bridge, but it looked so doable ….

Got all the way across and there was no way to enter the parking garage. Then a cop came by to yell at us