A small laser works through a series of mirrors and lenses to project the path onto the windshield, as on a head-up display, although to the driver it appears to hover over the road. What Zamojdo showed at the Telematics Update Navigation & Location 2007 forum in San Jose was an inventor's prototype that needs further development, downsizing, and cost-reduction. Zamojdo says he'd like to see the cost at $400 and even that may be high, were this to become a product. I was impressed by the accurate placement of the navigation cable in a canned video demo; it would be hard to make a wrong turn at a complex intersection, or fail to navigate a winding road on a dark night. Getting the virtual cable overlay to work on real roads will be trickier, but if he can pull it off, Virtual Cable could make wrong turns a thing of the past.