Melbourne’s 88th LXR complete: bridge-based grade separation insights for engineers
Reviewed by Tom Sullivan
First reported on Roads & Infrastructure (AU)
30 Second Briefing
Works on the Old Calder Highway and Watsons Road level crossings in Diggers Rest are now complete, with both crossings removed and replaced by new road bridges as part of the Victorian Government’s Level Crossing Removal Project, reaching its 88th removal. The package includes a new two-lane bridge designed to separate road and rail movements, eliminating boom-gate delays and reducing train–vehicle conflict points. For designers and contractors, the works add another reference for bridge-based grade separation on peri-urban arterial corridors in Melbourne’s north-west.
Technical Brief
- Diggers Rest works form part of the multi-site Level Crossing Removal Project delivery program across metropolitan Melbourne.
- Construction sequencing required maintaining rail operations while progressively diverting road traffic onto the new structures.
- Abutment and approach earthworks needed to tie into peri-urban arterial road profiles with minimal vertical realignment.
- Drainage upgrades around the bridge footprints manage runoff away from the rail formation and cutting batters.
- Bridge-based solution avoids extensive track slews or rail shutdowns typically associated with rail-under-road options.
- For future packages, the Diggers Rest configuration provides a reference layout for two-lane road-over-rail separations.
Our Take
With 88 level crossing removals now delivered under the Level Crossing Removal Project in Melbourne, our infrastructure coverage suggests Victoria is one of the most active Australian jurisdictions for grade separation, which typically reduces rail-related road congestion and improves network reliability for both freight and commuters.
The choice to replace the Old Calder Highway/Watsons Road crossing at Diggers Rest with a two-lane bridge indicates a design sized for local and regional traffic rather than future high-capacity urban expansion, which may influence how adjacent land is zoned and developed over the medium term.
Among the 79 Infrastructure stories in our database, relatively few involve such a high count of repeat, programmatic works on a single corridor, signalling that the LXRP is functioning more like a long-term capital works pipeline than a series of isolated projects, which can give contractors and designers greater certainty for resourcing and innovation investment.
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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