In case of brake failure, methods of stopping the vehicle include escaping into an open field, side street, or ramp, and:

Find an escape route:
While slowing the vehicle, look for an escape route: an open field, side street or escape ramp.
Turning uphill is a good way to slow and stop the vehicle. Make sure the vehicle does not start rolling backward after you stop. Put it in low gear, apply the parking brake and, if necessary, roll back into some obstacle that will stop the vehicle.