- Alberta's high-standard highway system routinely handles trucks of up to 63,500 kg (140,000 lb.) and provides links with all major Western North American markets.
- Currently, except for those states with grandfather rights, the U.S. restricts the allowable gross weight and length of trucks. Federal Bridge Formula B defines the relationship between a truck's weight, length, number of axles and spacing between axles, thereby determining the truck's configuration.
- Long Combination Vehicles (LCVs) are limited to western states. State laws and policies determine use and vary considerably across the west.