What does the motorcycle pass mean?

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The motorcycle pass switch is an overtaking light, used to alert oncoming vehicles to pay attention or switch to low beam, as well as to remind vehicles traveling in the same direction ahead to yield for overtaking. A motorcycle is a two- or three-wheeled vehicle powered by a gasoline engine and steered by handlebars to control the front wheel. It is lightweight, flexible, and fast, widely used for patrol, passenger and cargo transportation, and also serves as sports equipment. Generally, motorcycles place great emphasis on riding comfort and ease of operation. The working principle of a motorcycle's engine is similar to that of a car engine, with most motorcycles equipped with a four-stroke engine. The four-stroke engine operates in four strokes: intake stroke, compression stroke, power stroke, and exhaust stroke. Scooters do not require gear shifting, while straddle motorcycles do. The fuel gauge is used to indicate the amount of fuel remaining in the vehicle's fuel tank. The fuel gauge consists of a fuel level indicator with a voltage regulator and a fuel level sensor. The low fuel level warning device activates when the fuel in the tank falls below a certain specified level, immediately illuminating to alert the driver.