One-way hallways.
If it's a day where the schedule is flipped and my next class is right down the hall from the previous, I have to go around which takes an extra 3 minutes. Any other day, it's not an issue unless I'm going somewhere specific. If I went the wrong way, too loving bad for me! I have to back around, because to "improve traffic flow and avoid clumping," corridors 600 through 800 are east-campus-bound only after A lunch.
That's loving bullstuff because it just creates more loving crowding. People sit in the loving hallway (no, I don't mean stand around. THEY loving SIT.), forget around, and all the flow in that area is all directed to the same place. To put this in perspective, my school has 2100 people, and around lunch, there are around 200 people circulating through C600-800. Everybody is forced circulate the same way: up 600, left through 700, and outside toward the gym or down 800. The issue is that HALF THE PEOPLE GOING THROUGH THE GOD DAMN HALLWAYS DON'T HAVE CLASS THERE. There ends up being more traffic in 800 because people stand around (or sit) for no reason or attempt to go the opposite direction of everybody else.
Might as well have moving walkways that dictate movement for us! Damn Floridian schools.