Bangkok light rail study underway
https://www.railwaygazette.com/projects-and-planning/bangkok-light-rail-study-underway/59745.article
The light rail seems to be the second railway transportation to Suvarnabhumi International Airport. But, it would be slower than conventional Airport Rail Link, and then most people along BTS lines won't use the light rail, except for the area located southern part of Bang Na.
