| 摘要 |
A safety unit for use on vehicles such as school buses. In one embodiment, a housing is provided for the drive motor and related elements for moving a stop sign on the side of the bus between its retracted and extended positions. The housing has a removable cover to provide access to the drive motor and related elements, and the stop sign is mounted on a driveshaft that extends through a single opening in the bottom wall of the housing. In a second embodiment the safety unit is integrated with an access panel on the school bus.
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