Busan plans express metro to offshore airport
https://www.railwaygazette.com/metros/busan-plans-express-metro-to-offshore-airport/63993.article
It's the first time to hear that there is a plan to build a new airport around Busan. The reason for newly building the airport would be replacement of the obsolete Busan-Gimhae International Airport.
But, Busan-Gimhae International Airport used to have no railway access until inauguration of Light Rail. Even now, passengers have to change trains to get to the airport from downtown.
So, construction of airport express railway paralleling with construction of the airport must be a good idea not to repeat the same situation with Busan-Gimhae International Airport.