State-owned Transnet and Botswana Railways have resuscitated discussions on the construction of a proposed heavy-haul railway line that will link the two countries to “unlock” Botswana’s estimated 212-billion tons of coal reserves, Transnet announced on Thursday. Discussions around this project date back over ten years following a concept study that suggested that the most viable option to unlock the coal reserves from Botswana would be through the construction of this railway link.