I thought you meant actual dreams. Whenever I'm driving in a dream, the brakes never work. The pedals all mushy, and even if I put the transmission in park and turn the engine off, the car keeps creeping forward.
It hasn't happened in a while, but I used to have to drive while sitting in the passenger's seat a lot.
The full dreams would be perilously confusing to relate, so I won't.
I have on topic things to say, but later.