You arrive at a level crossing with red flashing lights and a lowered barrier. When is it safe to proceed? - AI Tiny Tools

211. You arrive at a level crossing with red flashing lights and a lowered barrier. When is it safe to proceed?

Single Choice Correct Rate: 80%

A. When the lights have turned off B. When it is safe to move forward C. When the barrier has been lifted D. When all of the above conditions are met

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