Answer: thirdrail

AnswerCrossword Clue
THIRDRAILIt electrifies cars through contact shoes
THIRDRAILDangerous subway track
THIRDRAILTrain's electricity source
THIRDRAILSource of electric current.
THIRDRAILSubway power conductor
THIRDRAILSubway danger
THIRDRAILSubway power source
THIRDRAILPower source for a subway train