I'd cut through the driveway, whatever material it is and then if I wanted to use a machine, I'd rent a trencher or ditchwitch. They can dig a narrow trench, about 6 inches wide for your cable to go in. Be sure to use direct burial wire. If this was electrical wire since it goes under a driveway you would need to put it in a pipe of some kind to protect it.

You could use a small drill or missile for underground utility work. For more info go to www.Virginia-Underground.com

A pressure washer, duckbill shovel and a pipe cut with a chisel point are great tools to quickly create a tunnel under a paved surface. http://www.askthebuilder.com/524_Tunneling_Under_Sidewalks_and_Driveways.shtml Tunneling Under Sidewalks and Driveways By Tim Carter ©1993-2008 Tim Carter DEAR TIM: I am installing some low voltage lighting in the planting beds in front of my home. But a sidewalk is blocking me from running the cable from bed to bed. I do not want to have to break apart the concrete or saw cut a small groove through it. Is there an easy way to go under the sidewalk with disturbing its integrity? Surely you had to do this once or twice and can share your secret tools and tricks. Mike S, Kalamazoo, MI DEAR MIKE: How right you are. I can't think of the number of times I had to extend a drain pipe, cable, irrigation line, gas line, etc. under a driveway, sidewalk or retaining wall without disturbing the finished surface material. Sometimes, the task was easy; other times it was a nightmare. But you are correct in thinking, I learned some creative solutions to the different challenges. A pressure washer, duckbill shovel and a pipe cut with a chisel point are great tools to quickly create a tunnel under a paved surface. My first inspiration for creating invisible pathways came from a fantastic backhoe operator I used to hire. We had to extend a pipe under a six foot wide sidewalk and digging a tunnel by hand with a duckbill shovel gave me a headache just thinking about it much less from doing it. The backhoe operator showed up at the jobsite with a large 16 foot long six-inch diameter steel pipe that had a coned-shaped metal end. He dug a two-foot deep trench perpendicular to the sidewalk and laid the pipe into the trench with the pointed end towards the sidewalk. He positioned the backhoe and used the hydraulic power of the machine to push the pipe under the sidewalk. The entire operation took about five minutes. Click to see larger image.

If the wires have to go under a sidewalk or drive way, you can use this technique: Dig the trench up to the obstruction. Then continue the trench on the other side of it. Cut a piece of conduit 10" longer than the span. Hammer a point on one end of the conduit. Now hammer the conduit under the obstruction. When it appears on the other side, cut off the point with a hacksaw. You now can connect another piece of conduit to it or run the cable through the conduit under the obstruction.