The major portion of the upgrade is a comprehensive highway data update. This essentially is a complete review of all the truck usable road network which MileMaker calculates routes. Updates to road restrictions, interstate systems, and other routes which commercial travel is allowed. The effect of such changes may shorten or lengthen certain routes in some areas of the U.S., Canada and Mexico. New geographic points (such as additional cities or locations) have also been included in the update.