milepost abbreviations

Hey Guys,

I was looking at Georiga Railfan earlier today and saw the listing for the Q373

http://www.georgiarailfan.net/csxtrains/Q373.html

I was just wondering what the milepost abberviations meant. I know this train rides on the seaboard and the B&O. but I can't understand what these are:

QHE
BAK
BAA
BA

Is there a list somewhere?

Thanks!

I don't think there is any kind of meaning to the milepost abbreviations. They only are used for the particular SD. I have the Baltimore Division timetable and I know BA is for the Metropolitan Sub, Cumberland Sub. BAA is for the Baltimore Terminal and Capital Subs. BAK is for the Philadelphia Sub. QHE might be Trenton or something. I have a copy of the 2005 timetable in PDF format if you want.