The Swiss Federal Roads Office (ASTRA) is a government agency responsible for the planning, construction, and maintenance of the national road network in Switzerland. It ensures that the roads are safe, efficient, and environmentally friendly, facilitating transportation across the country. ASTRA also oversees the implementation of road safety measures and traffic regulations. The agency collaborates with cantonal authorities and other stakeholders to improve road infrastructure and promote sustainable mobility, contributing to the overall development of the Swiss transport system.