One of the key objectives of The Haughton River Floodplain Upgrade is to improve flood immunity, which has historically seen the highway close on average every 1 to two years for approximately 70 hours at a time.
A key component to improving flood immunity is in the use of materials that can withstand extreme weather and for this project that means the use of Foam Stabilised Bitumen (FSB). FSB is created when hot bitumen is injected with cold water, causing it to bubble, and at the same time mixed with gravel and lime. The bitumen droplets attract to and coat the finer particles of gravel material, binding the mixture together.
The material is then used as a flexible base layer for two levels of asphalt, forming the road pavement on which vehicles will travel; a pavement which is more resilient to flooding.
About the Project
The $513 million project is jointly funded by the Australian Government ($414.4 million) and Queensland Government ($102.9 million). The project covers essential upgrades to the Bruce Highway, designed to improve safety and efficiency for road users, as well as significantly improving flood immunity. The project is being delivered by The Infrastructure Group (TIG), a joint venture between Bielby, BMD Constructions, JF Hull Holdings and Albem Operations, on behalf of the Department of Transport and Main Roads.