Speeding is the primary cause of many collisions, whether you're traveling on the highway or trying to maneuver in a parking garage. Traveling fast in a dark, tight space decreases visibility as well as your reaction time. Most garages have posted speed limits to help drivers stay safe. Keep an eye out for these signs and travel carefully so that you have time to react to unexpected obstacles, such as a pedestrian stepping out from behind a vehicle, a pillar in an unexpected place, or other cars turning a corner or pulling out of a space.