Saebyeok A504 is an early-morning autonomous bus from Geumcheon-gu Office through Doksan, Sillim and Noryangjin up to Seoul Station and City Hall. It connects south-western residential areas with the central business district.
The route covers 32 stops. It turns around in the City Hall area and returns to Geumcheon-gu office, Geumcheon police station. The first and last stops share a name and differ only in direction.
Covers pre-dawn travel from Geumcheon and Gwanak toward Yongsan and City Hall. It also calls at Noryangjin and the Seoul Station transfer centre.