[6] In July 1989, the Eastern Line Chachoengsao Junction–Sattahip Commercial Port section opened.

This resulted in passenger services terminating at Ban Phlu Ta Luang railway station and freight trains stopped operating on the line entirely.

In the 2010s, Samae San railway halt was constructed with some weekend tourist rail services terminating here, but this was short-lived.

On 10 November 2023, the line between Ban Phlu Ta Luang and Chuk Samet reopened, in the hopes of boosting tourism by providing closer access to U-Tapao International Airport, as well as direct rail access to HTMS Chakri Naruebet located at Sattahip Naval Base.

Along the route to Sattahip, at Si Racha Junction, there is yet another branch towards Laem Chabang Deep Sea Port and further at Khao Chi Chan Junction for Map Ta Phut Port, in Rayong.