The GCC rail network project is set to be completed and operating by 2018, at a cost of more than $15.4 billion, according to a report.
It will have a total length of 2,117 km and will link Kuwait City and pass through GCC countries all the way to Muscat, said the Kuwait Times report.
It also includes the link between Bahrain and Saudi Arabia by a bridge, and will use diesel to generate power, it said.
Each of the GCC countries is responsible for building and costs of establishing the rail link within its borders.
The rail network plan comes as part of a larger drive to increase infrastructure projects across the GCC which were forecast to exceed $86 billion last year, an increase of 77.8 per cent over 2013.
The collective GCC rail sector is expected to spend $200 billion as the six member countries – Saudi Arabia, Bahrain, UAE, Kuwait, Oman, Qatar aim to complete the integrated GCC-wide network by 2018, it added.