Nashville drivers pls explain to me how the airport lot works

I had a reservarion last night to pick someone up at the airport around 930pm. Get there and the entrance to the airport lot is CLOSED. i ended up driving in the wrong way to get to the pin and activate the trip.

What's the proper way to do this? Can you get them to just let you drive through? Or is there somewhere else you can drive to that will activate the trip?