ST meaning in Governmental ?

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 (cranes, front loaders, backhoes, etc.), 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.

When a load cannot be dismantled into units that can be transported without exceeding the limitations in terms of the dimensions and/or mass, it is classified as an abnormal load. Another definition can be summarised as following: an abnormal indivisible load ('AIL') is one which cannot be divided into two or more loads for transporting (on roads). Also, break bulk is used to define the freight that cannot be loaded into any ocean container or too large for air cargo.

Any road transport is framed by the CMR Convention (Convention on the Contract for the International Carriage of Goods by Road), which relates to various legal issues concerning transportation of cargo, predominantly by lorries, by road.