| 摘要 |
A side stop arm for school buses in various embodiments, each embodiment having the common element of an extendable arm on the side of a bus that contains the STOP sign or moves in concert with the arm. The extendable arm acts as both a deterrent to vehicles that may wish to pass the bus on the driver's side but more importantly acts as warning as to the bus being stopped for loading or discharge of passengers. The first extendable arm is a separate element engaged to the side of the bus. In this embodiment, the extendable arm has a breakaway portion in the event a passing vehicle comes into contact with the arm. In a second embodiment of the invention, the STOP sign is engaged to the end of the extendable arm and it extends outwards with the arm to a position displaced from the side of the bus. In a third embodiment, that is a combination of the first two, the STOP sign is engaged to the end of a first extendable arm that moves in conjunction with a second extendable arm. The second extendable arm is longer than the first and may contain a strobe light or other warning device at an end opposite the side of the bus.
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