A flashing red light at a railroad crossing means:
You are required to stop at all railroad crossings when a signal warns of an approaching train. These signals may include flashing red lights, a lowered crossing gate, a flagger signaling, or a train’s audible signal of warning. Do not move forward or attempt to go around any gate or ignore any signal of an approaching train.
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This question's difficulty is Medium
This questions appears in the following tests:
Pennsylvania Practice test 8
Pennsylvania Practice test 18