Nationalstrassen are the national roads in Switzerland, designed to facilitate efficient transportation across the country. They connect major cities and regions, ensuring smooth travel for both vehicles and goods. These roads are part of the Swiss road network and are maintained by the federal government. The Nationalstrassen system includes various types of roads, such as highways and main roads, which are crucial for economic activities and tourism. They are marked with a specific sign and are built to high safety and quality standards, reflecting Switzerland's commitment to infrastructure development.