Railroad & Special第 31 / 80 题
At an 'exempt' railroad crossing sign, a school bus:
a.Must still make a full stop
b.Must reverse and find another route
c.Is not required to stop, but the driver should still be cautious
d.Must sound the horn continuously
解析
An 'exempt' sign indicates a crossing where a stop is not required, often an abandoned or industrial track. Even so, the driver should slow, look, and remain alert. Local policy may still require caution, and the driver should never assume no train can appear.
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