Looking to track down new business, the IVIS Inc. in Edmonton, Alberta, decided to go underground. The effort worked: Almost seven years later, the company’s Vac-Con VPD4212LHAE combination truck, equipped with a high-rail system, is a common sight in the tunnels where the city’s light-rail commuter trains run.The high-rail package, manufactured by Diversified Metal Fabricators, allows the truck to go where other vehicles can’t. The $45,000 system lowers railroad wheels that lift the front end of the truck about an inch above the tracks, while keeping the rear wheels in contact with the rails, says Chad Eaton, project manager for
