The O-1 Highway is a major roadway in South Korea, primarily serving as a key transportation route in the Seoul metropolitan area. It connects various districts and facilitates the movement of goods and people, contributing to the region's economic activity. The highway is known for its efficient design and is often used by commuters traveling to and from the city. Constructed to alleviate traffic congestion, the O-1 Highway features multiple lanes and interchanges. It is part of a broader network of highways in South Korea, which includes other significant routes like the Gyeongbu Expressway and the Seohaean Expressway. The highway plays a vital role in enhancing connectivity across the region.