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    Thompsons–Berwick intersection upgrade: design and capacity notes for engineers

    September 29, 2026|

    Reviewed by Joe Ashwell

    Thompsons–Berwick intersection upgrade: design and capacity notes for engineers

    First reported on Roads & Infrastructure (AU)

    30 Second Briefing

    The $83.5 million Thompsons Road and Berwick-Cranbourne Road intersection upgrade in Victoria is now open to traffic seven months ahead of schedule, replacing the existing roundabout with signalised controls. The design adds new approach lanes to increase throughput for the 47,000 vehicles using the junction daily and incorporates upgraded bus infrastructure to improve public transport priority and dwell times. For civil designers and traffic engineers, the scheme signals continued preference for signalised, multi-lane layouts over large roundabouts on high-volume peri-urban arterials.

    Technical Brief

    • Capital cost is stated at $83.5 million for the intersection upgrade package.
    • Delivery occurred seven months earlier than the contracted completion date, compressing traffic management duration.
    • Upgraded bus infrastructure is integrated within the intersection footprint, rather than as separate off-line works.
    • Additional approach lanes are constructed on multiple legs, implying widening within an already constrained peri‑urban corridor.
    • Daily throughput of 47,000 vehicles indicates arterial‑class loading, justifying full signalisation and multi‑lane geometry.

    Our Take

    The Thompsons Road and Berwick‑Cranbourne Road Intersection Upgrade sits alongside the Victorian Government’s level crossing removals at Ruthven Street and Diggers Rest in our database, signalling a sustained program of grade and intersection separations aimed at smoothing key commuter and freight corridors around Melbourne.

    An $83.5 million road project delivered seven months ahead of schedule suggests the delivery model and contractor performance on this Victorian Government job may become a benchmark for upcoming rail-bridge and road-bridge works flagged in related Ruthven Street and Old Calder Highway pieces.

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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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