The Sunda Strait Bridge (Indonesian: Jembatan Selat Sunda, JSS, Jembatan Selsun, sometimes referred to in English-language reports as the SSB) is a planned road and railway megaproject between the two large Indonesian islands of Sumatra and Java. The suggestion for a bridge was reportedly first put forward in 1960 by Professor Sedyatmo from Institut Teknologi Bandung as a part of broader plans, known as Tri Nusa Bimasakti, to link the three islands of Sumatra, Java and Bali.
In October 2007, after years of discussion and planning, the Indonesian government gave the initial go-ahead for a project which includes several of the world’s longest suspension bridges, across the 27 km (17 mi) Sunda Strait. However, seven years later in November 2014, the incoming Joko Widodo government announced that plans to build the bridge would be shelved.
Construction of the bridge would be an ambitious project, being much more expensive than any other single infrastructure investment yet carried out in Indonesia. If the project goes ahead as planned, it would join the list of the world's most expensive transport infrastructure.
The project, with an initial estimated minimum cost of at least US$10 billion but probably considerably more, is for a series of bridges carrying a six lane highway and double track railway traversing the three islands of Prajurit, Sangiang, and Ular in the strait. The upper structure with a span of 3,300 meters would be like the Messina Strait Bridge in Italy, while the lower structure with a span of 1,991 meters would be similar to the Akashi Kaikyō Bridge in Japan. Officials in the consortium that plan to build the bridge originally hoped that construction would begin in 2012 but even the plan to prepare a feasibility study was delayed beyond 2012. It is currently (early 2013) hoped that a feasibility study will be prepared in 2013. There were originally hopes that the first travellers might cross the bridge as early as 2020 although the likely completion date is tending to drift because of delays in discussions about plans for the project.