Brakes acting up going to the floor

[Dom Ferris]

My brakes started acting up and I have to push the pedal all the way to the floor before they start braking and when our coach finally starts to brake, it hits all at once, kinda slams'em on or something. Are my breaks going out? is it dangerous to keep driving in this condition? My initial thoughts would be to check slack adjusters if newells are equiped with them, are they? I could always drop by a truck stop and let them take a look.

Thanks,

Dom