What is the easiest way to run low-voltage cable under a concrete driveway? I would like to use a conduit, either PVC or metal. My problem is getting the conduit under the driveway. It is 12' in width, and I cannot dig a hole on either end sufficient to pound rebar across. I've heard of using a pressure nozzle on a hose, but how do you control it? Any information or experiences you can share would be appreciated!