Johor Bahru–Singapore Rapid Transit System

The Johor Bahru–Singapore Rapid Transit System (RTS Link) is a planned rapid transit system that would connect Singapore and Johor Bahru, Malaysia, crossing the Straits of Johor. The line is also referred to as the "Singapore-Johor Bahru Rapid Transit System", "Malaysia-Singapore Rapid Transit System", etc. If built, it would be the second rail link between the two countries, after KTM Intercity's North-South line, and the first designed for high-volume local transit. The first part of a preliminary engineering study was completed in March 2014, with completion targeted for 2019.

Currently envisioned as a two-station line, the Singapore end would be located near Republic Polytechnic, with interchange to Woodlands North MRT Station on the upcoming Thomson-East Coast MRT Line, and the Malaysian end would be at Bukit Chagar, with interchange to Keretapi Tanah Melayu Intercity services at JB Sentral and the planned JB Metro. Both stations are planned to have colocated Singaporean and Malaysian customs, immigration and quarantine facilities. Bridge and tunnel options are being considered for the link across the Johor Straits. The option will be decided upon during the next leaders' retreat to be held between the prime ministers of the 2 countries in 2016.

The RTS link connecting Singapore and Johor Baru will be connected via a high bridge near the Johor–Singapore Causeway, the prime ministers of Singapore and Malaysia announced on 13 December 2016 in a joint news conference after the signing of a bilateral agreement on the Kuala Lumpur–Singapore High Speed Rail project. They agreed that the RTS Link will connect the Thomson-East Coast MRT Line (TEL) from Woodlands North to Johor Baru via the high bridge and the link will use the same rail systems and trains as TEL. The bilateral agreement for the RTS is expected to be inked by the end of 2017.