Calliope crossroads upgrade

From 2012 to 2014, Golding constructed the Calliope Crossroads Upgrade on behalf of the Department of Transport and Main Roads (Queensland).Golding successfully delivered improvements to this critical regional traffic hub which links port and industrial facilities in Gladstone to established agricultural areas in the Callide and Dawson valleys, and the developing coal fields in the Bowen and Surat basins.

The $59.5mproject has greatly improved the safety of the intersection while increasing the speed limit on the Bruce Highway to 100kph and providing greater than one in 100 year flood immunity. Currently in excess of 14,000 vehicles, including 1,600 trucks, pass through the intersection daily and it is now the largest highway interchange in regional Queensland.

The project included the construction of two super-T bridges, widening and realignment of the Dawson Highway under the Bruce Highway to four lanes, on/off ramps controlled by signalised intersections, reconstruction and realignment of approximately 3.5km of the Bruce Highway, and provision of new designated pathways for pedestrians and cyclists adjacent to the Dawson Highway.

Effective traffic management was critical to its success. Golding used 3D modelling to develop an innovative and cost effective traffic management and staging strategy. The strategy required only two major traffic switches which significantly decreased traffic congestion minimising impacts on road users.

Golding’s proactive engagement with the community enabled the incorporation of practical solutions to community and stakeholder concerns into construction management and planning, achieving the desired positive outcomes.

Both record rainfall from ex-Tropical Cyclone Oswald and the wet season impacted the project significantly. Golding proposed to accelerate the works to fully mitigate the impact of the wet weather. More than 40,000 labour hours were completed with zero LTIs. The works were completed on time and within DTMR’s and the Federal Government’s budget.