Prayer always works when ever I get in any kind of a jam. It's nice to know when you do something stupid He's always there to watch over you. I had a L-R tire blowout once in a Chevy van pulling a way-too-big travel trailer. As I saw the tire shreds from the left-rear falling down in front of the van's windshield like rain I just said "Lord, please keep it straight". He did, and we pulled over on 3 wheels to the side of the road. As I was changeing the flat on the van it was raining cats and dogs and the tornado sirens were blowing. I looked off to my left and I see 4 "ropes" coming down from the sky and moving parallel to me. Sometimes prayer is the ONLY thing that works.
As far as brakes go, that's one of the advantages of a DP over a gasser. With a DP you have a great Jake brake and if all else fails you can punch the park brake button to nail the spring brakes, which don't need any air pressure to operate. Of course, you'll probably lock 'em up in the process but you will get slowed down pretty fast. If the brakes were overworked (that would be because of "brain" fade, not "brake" fade
- see Driver's comments about not keeping it under control in the first place) and nothing was grabbing then you just have to stand on them as much as possible and try to scrub off speed any way you can, even by slaloming if the road and traffic allow you to do so safely. There's also the surrounding terrain to consider. If you can keep it on the road and an upgrade is coming just ride it out to the upgrade. If there is no ditch and the terrain is flat, see if there's a field or something you can aim at without flipping it. Each situation is unique and gassers have a few less options when it happens so you have to decide on the spur of the moment what to do. Just don't panic - it won't help. Either way, the tranny automatically upshifting to protect the engine is probably good. It won't help anyone to have a blown engine in their coach during this ride. Then you'll have "Armstrong" steering as well to deal with.