A photo of the upcoming Johor Bahru–Singapore Rapid Transit System (RTS) Link has sparked discussion on Reddit over the Singapore–Malaysia boundary on the bridge.

The image showed the marine viaduct stretching across the Straits of Johor, with one side appearing grey and painted, while the other looked like bare concrete. Many users quickly noted that the difference may stem from a common infrastructure practice.

The paint gave it away

Several commenters identified the painted section as Malaysia’s side and the unpainted section as Singapore’s. One user noted that Singapore generally does not paint MRT or LRT viaducts, while Malaysia commonly uses a grey colour scheme for its rail viaducts.

Others joked that the contrast was so obvious it became an accidental border marker.