Today there are approximately 225 million vehicles registered in the United States alone. Each of us spends, on average, 25.5 minutes getting to work each day. That number would certainly be higher without the technology infrastructure controlling the thousands of vehicle signals, pedestrian signals, traffic controllers and programmable changeable message signs that are now a part of the country's landscape.

A vital part of these signals are the cabinets which contain the electronic controls for these devices. Control cabinets contain a variety of sensitive electronics, including relays, microcomputers, switches and power supplies. As in other applications, these electronics require cooling. In some situations fans and blowers are sufficient, but in others active cooling is required to keep these components running smoothly. Several manufacturers of traffic control equipment have been using Kooltronic's Horizontal Rack-Mounted Air Conditioners to maintain the optimal temperature within their cabinets.