Riksvei 4 is a national road in Norway that connects the capital city, Oslo, to the northern regions of the country. It spans approximately 200 kilometers and serves as a vital transportation route for both local and long-distance travel. The road passes through various landscapes, including forests, mountains, and rural areas. Originally established in the early 20th century, Riksvei 4 has undergone several upgrades to improve safety and accessibility. It is an important artery for commerce and tourism, facilitating access to popular destinations and contributing to the local economy. The road is well-maintained and regularly monitored for traffic conditions.