A carriage for transporting heavy loads on conventional roads is disclosed. The carriage comprises a central beam extending the length of the carriage and a plurality of cross beams. At least one of the plurality of cross beams comprises a hollow element having a first end and a second end, wherein the hollow element is coupled to and extends perpendicularly to the central beam; a first beam slidably positioned within the first end of the hollow element, wherein the first beam is coupled to at least one axle; and a second beam slidably positioned within the second end of the hollow element, wherein the second beam is coupled to at least one axle. The carriage further comprises a hydraulic system coupled to each of the plurality of cross beams for hydraulically sliding each beam positioned within each hollow element.