Laser parking aids that mount inside of your garage are come in handy as they help guide you when parking in your garage. There are a number of digital display parking aids that mount to your garage wall. These aids come with proximity sensors that display how far you from the wall or come as a traffic-light style display that flashes green, yellow, or red depending on your proximity. Some proximity sensing parking aids come with a display that plugs directly into your cigarette lighter and will indicate you are close to the accompanying sensors mounted on your wall.