Inside the Massive Repair Shops Where Subway Cars Go for a Makeover
Briefly

Sometimes it's a marvel the system functions at all...Every single wheel, motor, brake, axle, wire and door on every subway car gets completely refurbished every six to 12 years at the Coney Island Overhaul Shop in Brooklyn or its sister facility at 207th Street in Manhattan.
The work is part of a scheduled maintenance program, introduced in 1989 and designed to prevent breakdowns before they occur.
Read at www.nytimes.com
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