Bruce Highway: Deception Bay Road Interchange Upgrade

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Road capacity at Deception Bay, South East Queensland
Priority Project
South East Queensland
Fast-growing cities
National Connectivity
Problem/Opportunity timeframe
Near term (0-5 years)
Proposed By
Queensland Government
Evaluation Date
23 August 2019

Problem to be addressed

The Bruce Highway is part of the National Land Transport Network and is the primary north–south route for regional and local traffic on the east coast of Queensland between Brisbane and Cairns.

The Deception Bay Road Interchange is approximately 35 km north of Brisbane CBD and 12 km south of Caboolture.

The interchange is an important connection for commuters travelling to and from Moreton Bay, and the surrounding regional areas. It also provides access for freight vehicles travelling between the industrial areas of Moreton Bay and Brisbane.

The interchange is heavily congested during morning and evening peak periods. Traffic queues can extend from the exit ramps, affecting traffic on the Bruce Highway. There is also a significant safety problem at the interchange.

These are issues that are likely to worsen as the populations of Moreton Bay and its surrounding regions grow and increase pressure on the road network.

Project description

The proposed project includes new parallel bridges over the Bruce Highway, upgraded signalised intersections on Deception Bay Road and increased length and capacity of entry and exit ramps.

The proponent expects the project to improve the average peak-hour travel speeds at the interchange, with the evening peak improving by over 100% by 2031 (from 23 km/h to 50 km/h).

The project is also expected to address safety issues by reducing projected crash rates by over 40%.

In addition to supporting a range of national, state and local plans and priorities, the project has strategic merit by relieving congestion and improving freight efficiency.

Economic, social and environmental value

The project will deliver economic benefits in the form of travel-time savings and associated social and environmental benefits, including reduced fuel consumption costs and lower vehicle crash rates.

The proponent’s stated benefit-cost ratio is 3.03, with a net present value of $234 million (7% real discount rate).

Capital cost of initiative as stated by proponent (2018 business case) $152.1 million (P90, nominal, undiscounted) | Australian Government contribution $120 million | State government contribution $30 million | Private sector contribution N/A