Power Transmission
The LIRR's electrified lines are exclusively powered by 750 V DC third rail with the contact shoe running along the top of the rail, similar to the New York City Subway and PATH trains. In comparison, Metro-North Railroad uses a combination of under-running third rail on its electrified trackage and overhead catenary wires on the New Haven Line. New Jersey Transit's electrified rail lines are powered by overhead catenary wires.
Read more about this topic: Long Island Rail Road
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