Construction of roads and railways

isic code 421 covers the construction of roads, railways, and related infrastructure. This industry plays a crucial role in the development and connectivity of a country's transportation network, facilitating the movement of people, goods, and services. The construction of roads and railways is a key driver of economic growth, as it enables the efficient flow of resources and supports various other industries within the broader economy.

The construction of roads and railways involves several key steps, including site preparation, earthwork, laying of foundations, and the installation of various components such as tracks, signals, and bridges. Advanced construction techniques, such as the use of heavy machinery, specialized equipment, and modern surveying methods, are employed to ensure the quality, safety, and efficiency of these projects.

The construction of roads and railways requires a range of inputs, including raw materials such as cement, steel, aggregates, and asphalt. Additionally, this industry relies on specialized machinery, such as excavators, bulldozers, and paving equipment, as well as skilled labor, including civil engineers, construction workers, and project managers. 2511 Manufacture of basic metals and 2351 Manufacture of cement, lime and plaster are examples of industries that provide key inputs for the construction of roads and railways.

The primary output of isic code 421 is the construction of roads, railways, and related infrastructure, such as bridges, tunnels, and interchanges. These outputs are then consumed by various other industries, including 4921 Passenger rail transport, interurban, 4923 Freight transport by road, and 4912 Freight rail transport, which rely on the transportation network to move people and goods efficiently.