I am sure that 99.8 % of the members know this bit of information. Last Monday, a few members of my Sunday school class took day trip from Rockwall TX (20 miles N.East of Dallas) to Ft Worth via the Dallas Area Transportation and FT Worth train (TRE). One member was a Railroad Engineer and "Operated" trains for a bunch of years and he is a wealth of RR information.
Example:
On the front side of a Diesel Engine is the letter "F" , to prove it, when a train pulled into to the depot we walked to the front of the engine and sure nuf, there was the letter "F" , to indicate the front of the engine.
Decided to check my Legacy GP 35 Louisville and Nashville and much to my surprise, there is the letter "F" on the front side (both sides), I had never noticed this but books can be written about what I don't know about trains
Brent