QLD design tender for Sunshine Motorway ramps: geometry and interface notes for engineers
Reviewed by Tom Sullivan
First reported on Roads & Infrastructure (AU)
30 Second Briefing
Queensland’s Department of Transport and Main Roads has issued a detailed design tender for two new south-facing ramps connecting to the Sunshine Motorway at Mount Coolum, tied to an upgrade of the Sunshine Motorway–West Coolum Road interchange. The scheme must integrate with Sunshine Coast Regional Council’s planned link between Suncoast Beach Drive, South Coolum Road and West Coolum Road, creating a new local–motorway interface. Designers will need to resolve ramp geometry, weaving lengths and tie-ins to existing pavement while accommodating future council road connections.
Technical Brief
- Scope is purely detailed design, indicating planning, corridor protection and preliminary geometry are already resolved.
- Drainage design will need to manage additional ramp runoff without degrading existing Sunshine Motorway hydraulic performance.
- Pavement design must tie into existing motorway and local roads, likely requiring staged construction interfaces.
- Traffic modelling will be required to assess ramp merge/diverge performance under future council road traffic loads.
- Utilities and services along the road corridor will constrain ramp footprint and retaining structure options.
- For similar interchange infill projects, early constructability input from contractors can reduce future staging and traffic-switch risks.
Our Take
The Queensland Government appears frequently in our 827-item Infrastructure stream, with multiple Sunshine Coast transport pieces, signalling that this corridor is a recurring focus for state-led road upgrades rather than a one-off project.
The related School Transport Infrastructure Program article involving the Queensland Government and Roads & Infrastructure Magazine shows parallel investment in local safety and access works, suggesting this Sunshine Motorway design tender may need to integrate with future school and active transport links in the region.
For practitioners, the clustering of projects around Mount Coolum, West Coolum Road and Suncoast Beach Drive indicates that any design solution here will likely have to manage constrained coastal geomorphology and high tourism traffic volumes, which in our database often drives more complex staging and drainage design on Queensland coastal roads.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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