The Metropolitan Transportation Authority on Friday opened a new railcar testing facility in Sunset Park.

The complex will serve as the first stop for all new subway cars before they are put into service, officials said. It will help the MTA process new subway cars, work locomotives and other rolling stock more efficiently, helping complete onsite testing so they can enter service more quickly.

This comes as the MTA prepares to receive the biggest infusion of new rail cars in decades.

Located near the South Brooklyn Marine Terminal, the facility can accept rolling stock delivered by truck, rail or boat. Individual cars can then be linked together for testing and commissioning on the facility’s in-house tracks. The newly created trains will then be sent via the facility’s direct connec

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