In road transport, an oversize load (or overweight load) is a load that exceeds the standard or ordinary legal size and/or weight limits for a truck to convey on a specified portion of road, highway or other transport infrastructure, such as air freight or water freight. In Europe it may be referred to as special transport or heavy and oversized transportation. There may be load per axle limits. However, a load that exceeds the per-axle limits, but not the overall weight limits, is considered overweight. Examples of oversize/overweight loads include construction machines, pre-built homes, containers, construction elements (bridge beams, generators, windmill propellers, rocket stages, industrial equipment).
The legal dimensions and weights vary between countries and regions within a country. A vehicle which exceeds the legal dimensions usually requires a special permit which requires extra fees to be paid in order for the oversize/overweight vehicle to legally travel on the roadways. The permit usually specifies a route the load must follow as well as the dates and times during which the load may travel.