The 'Drivemotion' LED car sign is an amusing way to get across to other drivers how you're feeling that day. If you're driving angry then it's probably best to let all the other traffic know just how you're feeling.
The LED car sign is set up through a controller that the user is able to customize for different messages. The driver just has to press a certain button for the sign to light up in the style that they want. Along with the hilarious emoticon faces that it can display, there can also be distinct messages such as "BYE" or "HELLO." With all the distractions already on the road, it might be best to keep the messages as simple as possible.