Sarawak had never been particularly rich in railways but it was little known that there was an actual railway laid down in an area called Ensalai, near inland of the Baram River, in 1960.
Kuala Belait is a town in Brunei nearest to Miri. Before the bridges were made across both the Baram River and Belait River, the only way across to and from Miri would be by ferry that operated on the Belait River connecting directly to the town.