HHG, or Household Goods as it is known, is the standard mileage guide that Shippers and Carriers use to negotiate rates for freight. It is the shortest legal highway mileage from two points, which an 80,000 trailer may take. The calculation does not consider time as a factor, thus the route may take more driving time, but accomplish less miles. The Practical Route is the most time efficient method of driving.Practical Routes tend to be the more desirable route of travel, and also may be used for calculating Fuel Tax reporting. Both are based on a 53' trailer length and 13'6" clearances.