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Mars light
01
a type of warning light mounted on the front of trains in North America, designed to rotate or oscillate to alert vehicles and pedestrians at crossings
Mars light
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Example
Passengers noticed the Mars light from the platform as the train pulled in.
The Mars light flashed brightly as the train approached the station.
The Mars light helped ensure that everyone was aware of the train's presence.
Drivers stopped at the railroad crossing when they saw the Mars light spinning.
The engineer turned on the Mars light to signal that the train was coming.
