They'll always come on when you start the car but go out fairly quick. If you mean they are on beyond that then your AYC\ACD pump is probably in the processes of giving up the ghost. Eventually you'll probably have the lights on the whole time and will need the pump replaced or reconditioned.
They Came on after a few harsh corners and stayed on till a got home then they were back to normal now the mrs said the came back on when she was driving but went back off after a few mile