There's a picture on this site, which can be seen through this link (95.5K), which features R-36 car #9677. Look at the "EXP" sign, located above the cab. It's GREEN!!! I know that it's pretty unusual to see such a thing. I have a picture of #9340, which can be seen through this link (84.5K, taken @ 45 Road-Courthouse Sq, Flushing-bound platform), and it also has a green "EXP" sign. I think it's pretty unusual to see such cars.
What's up with these green "EXP" signs?
Besides 9677 and 9340, what other cars are they on?
Did any these cars ever have the more common red "EXP" sign?
BTW, I think I might have seen a car on a #2 train with a red "LOCAL" sign, but I'm not sure. Sometimes my eyes play tricks on me. :-)