I've never driven a tractor trailer....only towed a car on trailer once...but I remember driving around looking for a parking space that was parallel to the curb so that I could simply siddle up against the curb to park and pull out when it was time to leave... I know that's not efficient at ALL for capacity...but i'm certain I woulda jackknifed the hell outta that trailer if I'd have had to back out of a 90degree spot.
A double open ended 90degree spot would have been perfect though...pull in, drive out. Is that what you ended up with? A double open ended 90degree?