As part of the increased use of heavy vehicles, the agricultural industry has for a number of years expressed a desire for a general facilitation of the rules regarding weights and mass per axle in order that new, large farm vehicles do not have to be transported on oversize-trailer to and from the field, but rather are allowed to drive themselves on the road system. Currently the agricultural industry mainly wishes to facilitate two types of vehicles: 1) Farm vehicles fully or partially fitted with rubber tracks (tracked vehicles) and 2) farm vehicles with wide low-pressure tyres (e.g. slurry tankers). For both types of vehicles, the industry wants facilitations that would result in them being able to drive according to the same rules on the entire road system, i.e. that it is general practice across the country. Based on the wishes of the industry, the Danish Road Safety and Transport Agency and the Danish Road Directorate (in dialogue with the industry) have previously researched the options to accommodate some of these wishes. Accordingly in 2010, the Danish Road Directorate estimated that dispensation could be granted for increased mass per axle for certain types of slurry tankers and certain types of tracked vehicles for driving on the national road system, but that the municipal road system might entail circumstances, where it would not be wise to grant dispensation, as one could not rule out that driving farm vehicles heavier than today could result in increased expenditures for road maintenance of weaker municipal roads and bridges. Therefore, the Danish Road Directorate, in broad cooperation with KL [the National Association of Danish Municipalities], the agricultural industry, the asphalt industry, and the Danish Road Safety and Transport Agency, has carried out a series of practical tests by driving certain heavy farm vehicles on the road system. The purpose of these tests was to research the attrition effects on the roads as well as the impact from “legal” alternatives (trailer trucks) on a typical rural road, where such vehicles would typically drive.