In 2000, the Saskatchewan Department of Highways and Transportation (SHT) conducted two trials of heavy trucks equipped with tire pressure control systems and operating on rural roads. The Forest Engineering Research Institute of Canada (FERIC) participated in an advisory capacity and prepared this summary of the trials. The main objectives involved quantifying the potential benefits of optimized tire pressures in minimizing damage to rural roads, and offsetting the incremental road damage caused by larger capacity trucks carrying enhanced weights. Tire heating and fuel consumption were also examined.