This article is part of a daily series of MegaProjects articles. If you want to know more about PPP projects with a considerable size visit our MegaProjects section. You can receive them by email on a daily basis.

The government of Indonesia has announced plans to tender four public private partnership (PPP) projects, including one rail link, two toll roads and one water supply project in the next months.

The mentioned PPP projects are the following:

* Soekarno-Hatta International Airport Railway. The express train PPP project will link Soekarno-Hatta International Airport and Halim Perdanakusuma Airport in East Jakarta. The line will travel through five stations: Halim Station, Manggarai Station, Dukuh Atas Station, Tanah abang Station, and Pluit Station.

The total project investment is estimated at IDR24 trillion (US$1,843 million).

* Balikpapan-Samarinda Toll Road. This 94 kilometers-long toll road consists of five sections, two of which are to be funded by the central government's State Budget. The three remaining section are to be tendered to the private sector. The land acquisition process for these three sections is nearly completed.

The total project investment is estimated at IDR 11.4 trillion (US$875 million).

* Manado-Bitung Toll Road. The project has been included in the list of the Master Plan for the Acceleration and Expansion of Indonesian Economic Development (MP3EI). The new road will be divided into two sections, namely Section I of Manado-Airmadidi route along 12.5km and Section II of Airmadidi-Bitung route along 25.5 km.

The total project investment is estimated at IDR4.3 trillion (US$330 million).

* West Semarang water supply PPP. West Semarang SPAM will have production capacity of up to 1,050 litres per second. The water will be supplied to 60,000 households in West Semarang that have not been connected to the drinking water network belonging to the Regional Drinking Water Supply Company (PDAM).

The total project investment is estimated at IDR 765 billion (US$56 million).

According to the Indonesian Coordinating Minister for Economics, Sofyan Djalil, the Balikpapan-Samarinda Toll Road is expected to be tendered in May. An the other three projects are set to be launched by the end of 2015.