Highway 1 is a major highway that runs through South Korea, connecting the major cities of Seoul, Busan, and Daegu. It is the longest highway in the country, stretching over 1,000 kilometers and passing through some of the most beautiful scenery in the country. Along the way
From Wikipedia
Expressways in South Korea, officially known as National Expressways, are controlled-access highways that form the highest level of the country's road network. Most sections are tolled and maintained by the Korea Expressway Corporation, though a few routes are built and managed by approved private companies.