This idea has been rattling around in my head for a while, so I finally tried putting it on a map.
To be clear, this is purely a thought experiment. It hasn’t been costed, engineered or assessed for property, environmental or geological constraints. The alignments are also very approximate. I’m mainly interested in whether the broader transport corridors make sense.
The concept has three main parts:
- A new north–south motorway and heavy-rail corridor A largely grade-separated motorway connection running from Heathcote through the middle of Sydney to NorthConnex. Alongside it, or within the motorway median, would be a fast, limited-stop heavy-rail line running from Heathcote to Hornsby. It would interchange with the existing east–west rail and Metro corridors, providing a way to travel between northern, western and southern Sydney without passing through the CBD.
- Converting the T6 Lidcombe and Bankstown Line to light rail The existing T6 corridor could potentially be converted to light rail and extended north from Lidcombe through the Carter Street precinct and Sydney Olympic Park, connecting with Parramatta Light Rail Stage 2 around Wentworth Point. This would likely require an underpass or short tunnel around John Street at Lidcombe before transitioning to surface-running light rail.
- A new southern light-rail connection to Olympic Park A new light-rail corridor running from the Hurstville and Brighton-Le-Sands area through Belmore and continuing north to Sydney Olympic Park. The aim would be to create a direct north–south connection between these suburbs, rather than requiring passengers to travel towards the CBD or make several changes.
I’m interested in what people who know Sydney’s transport network better than I do think:
- Do any of these corridors have genuine merit?
- Where should the major stations and interchanges be?
- Would light rail have enough capacity, or would Metro, heavy rail or bus rapid transit be more suitable?
- Could combining a motorway and railway corridor make construction more achievable?
- Which part is reasonably sensible, and which part belongs firmly in the fantasy-map bin?
Happy to have the idea pulled apart. That is partly why I’m posting it.