The road alignment begins as an extension of the Gyeongbu Expressway travelling underneath downtown Busan. A spur route branches from the main tunnel under the city to start the Busan-Geoje Fixed Link. The main route then proceeds through the beginning of the core tunnel section. The northern rail alignment continues south of Busan Station, entering a tunnel approximately 800 meters south of the station platforms. At the 62 kilometer mark is the first automobile rest station, called the North Rest station. It is equipped with restrooms, vending machines, a petrol station, and a small information center. At the 100 kilometer mark is both the Midpoint Island Rest Station and the Busan-Hakata rail station, containing several amenities for weary travelers. At the 172 kilometer mark is the Sout