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    Centenary Bridge upgrade: twin crossings and load implications for engineers

    December 4, 2025|

    Reviewed by Joe Ashwell

    Centenary Bridge upgrade: twin crossings and load implications for engineers

    First reported on Roads & Infrastructure (AU)

    30 Second Briefing

    The Centenary Motorway crossing of the Brisbane River at Jindalee has been expanded from four to six lanes, with a new three‑lane northbound bridge now open and the existing structures rehabilitated to carry three southbound lanes. The upgrade removes a key bottleneck on this major radial route into Brisbane, materially changing traffic loading patterns and redundancy across the twin structures. For designers and asset managers, the project signals a shift from single to duplicated river crossings, with implications for inspection regimes, maintenance access and future flood resilience strategies.

    Technical Brief

    • For similar brownfield river crossings, duplicated carriageways are becoming the default risk‑management strategy for redundancy.

    Our Take

    Within the 153 Infrastructure stories in our database, relatively few cover Brisbane River crossings, so the Centenary Bridge Upgrade stands out as one of the more substantial urban motorway capacity projects in south-east Queensland.

    Expanding the Centenary Motorway river crossing to six lanes typically allows operators to introduce more robust incident management (breakdown lanes, clearer merge zones), which in other Australian motorway upgrades has translated into fewer secondary crashes and shorter peak-period delays.

    BMD’s role on the Centenary Bridge Upgrade reinforces its presence in major Queensland road projects in our coverage, which often positions the contractor favourably for subsequent maintenance and ancillary works packages along the same motorway corridor.

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    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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