Originally Posted by
davetravels
Interesting. So, I guess you're thinking that - what - If the train said "D" as in "Delta", that might be showing favortism, or unfair free advertising, or something?
It is to prevent confusion amongst passengers. Mostly Connection flights go out of D. I bet D alone fills about 10% of all of DL's departures (Connection included.) The bulk goes out of A and B.