The types of vehicles which have excessive axle loads.

Measurements at several experimental sites and photography of about 6000 vehicles to see what types of vehicle are being overloaded. Of these about half were two-axled lorries with dual tyred wheels at each end of the rear axle, about one-third were articulated vehicles with dual tyred wheels at each end of the single rear axle of the trailer and about an eighth were articulated vehicles with four wheels spaced at intervals along the rear axle of the trailer.