There are no railways in Bahrain but there is a firm proposal for a 87km railway connecting the capital, Manama, with the Saudi Arabian railway network. The railway would traverse the proposed 26km King Hamad Causeway and a 10km bridge. This new link would parallel the existing road only King Fahd Causeway between the two countries. A proposal for a similar, but much longer, causeway linking to Qatar is not currently being pursued.
Flag image from CIA World Factbook