The most common traffic light detection system is the inductive loop sensor, which uses coils of wire under the pavement to detect vehicles entering its magnetic field. Unfortunately for motorcycles and cyclists, there's often not enough magnetic material in a bike to change the light. Consequently, motorcycles can end up sitting at an unchanging red light until the cows come home. To prevent an unending cycle on for motorcycles, many states have enacted "Dead Red" laws. These laws let motorcycles run red lights, but there’s a catch. Motorcycle riders aren't allowed to just speed through a red light whenever they want. Each state with a Dead Red law has specific language regarding proper Dead Red etiquette. If you happen to live in a state that has no Dead Red law, you’ll just have to get yourself a motorcycle with more metal.
