"Please be mindful of litter. There are trash cans at most intersections. If you can't find one, take your trash with you until you can dispose of it properly. What would your mama think?"
"Take your ticket with you; pay at a kiosk returning to your car and driving to the exit."
"Check to make sure gate at far end (toward downtown) is closed!"
"Take first available parking spot; go down to large lot behind store if necessary. Please don't clog traffic by waiting for a space. Thanks!"
"Please don't block residential driveways, and place your trash in one of the conveniently located receptacles."