Typically, parking lots will have posted speed limits. If you see any speed limit signs, make sure to follow them to avoid any tickets and to keep everyone safe. However, if you don’t notice any posted speed limits, the National Motorists Association recommends staying below 15 miles per hour at all times. With the possibility of pedestrians crossing your path or a car backing out in front of you, driving slowly is one of the best ways to avoid an accident in a parking lot. The slower you’re driving, the quicker you can come to stop if necessary.