I can't really remember where I was denied when the bike was folded. I sold my both Dahon folders (Speed 7 and Piccolo) a while back but recently acquired a Vitesse and will once again start riding the bus lines without any trouble. I can't remember but there were a couple of times it happened. Unfortunately, I did not have a cover or it wouldn't have been a problem.

I would like Dahon to build a soft cover bag with wheels on the bottom so you can roll the bike. The Brompton wouldn't need it but there are times you still need to cover the bike and the wheels will makes things a lot easier than carrying it on your back!