Green Lights

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Bill

Service Attendant
Joined
Sep 12, 2006
Messages
126
Location
Cincinnati OH
On Amtrak cars I noticed there are little green lights(on the outside) on each one pointing straight to the next car. My question is what are they there for?
 
Actually, they are brake indicator lights.
I still don't know what that means...the brakes have air and work? I was beginning to think I was the only one to see those lights. Thanks I don't know much about the operation of a train.
 
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