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About the tunnel

Following the Blackheath co-design process, Transport for NSW is now seeking wider community feedback on tunnel options for Blackheath.

A long tunnel was the preferred option of the Blackheath Co-Design Committee. Transport for NSW has chosen to seek community feedback on one shorter tunnel portal option.

Tunnel options for Blackheath are still in the very early stages of strategic design. Portal locations are approximate, and the tunnel alignment has not yet been determined.

Tunnel route

The long tunnel was chosen by the Blackheath Co‑Design Committee as their preferred route option.

The tunnel route will depend on which tunnel portals are chosen.

The routes shown are a preliminary design only. Further technical studies are needed to determine the exact alignment of the route underground.

Early investigations indicate that a tunnel is feasible under Blackheath and that much of the tunnel can be built at an average depth of 30–40 metres below the surface, the height of a 10 storey building.

A long tunnel route option, between the two outermost portals, would provide a 4.5km underground bypass of Blackheath.

A shorter tunnel, between the Sutton Park and Mt Boyce Heavy Vehicle Safety Station portals, would be approximately 4km in length.

_{The average depth of the tunnel will be 30–40 metres, the height of a 10 storey building.}

Watch overview video

Blackheath route options

There are three potential locations for the tunnel openings, or portals.

These locations have been chosen to minimise impacts on property, and are situated in areas where the ground is rising. This gradient would help to achieve the right depth for a tunnel while minimising above ground impacts.

Southern tunnel portal options

The two potential portals at the southern end of Blackheath are marked on the map near:

Evans Lookout Road
Sutton Park

The proposed portal south of Evans Lookout Road would have an impact on a section of National Park and Sydney Water catchment area.

The proposed portal at Sutton Park would have an impact on recreational land and residential properties at the end of Evans Lookout Road, Brightlands Avenue and Chelmsford Avenue.

Northern tunnel portal option

The potential portal at the northern end of Blackheath is also marked on the map near:

Mt Boyce Heavy Vehicle Safety Station.

The proposed portal at Mt Boyce Heavy Vehicle Safety Station may impact access to the picnic area and may also require relocation of the scar tree.

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Medlow Bath

Medlow Bath village is the first section of the Great Western Highway upgrade to begin detailed design.

What does the Strategic Design propose?

A 2.5 metre shared path – for pedestrian and cyclists linking to the existing walking and cycle trails at both ends of Medlow Bath
A 1.5 metre shoulder
3.3 metre lanes
A 6 metre median, with trees and planting in the middle, which also allows for right turn bays at the Hydro Majestic, the United Service Station and Bellevue Crescent.
A Pedestrian bridge across the highway, providing lift access to the train platforms.

Thank you for your feedback

Consultation on the proposed strategic design for Medlow Bath has now closed. We are collating feedback received from the community and will be publishing a Consultation Summary Report later this year.

There will be further consultation in 2021, once the team have progressed the design and environmental assessment. A Review of Environmental Factors will be exhibited for consultation in mid-2021

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View map comments

Comment map closed as of 1 September 2020.

Thank you for your feedback.

Consultation on the proposed strategic design for Medlow Bath has now closed. We are collating feedback received from the community and will be publishing a Consultation Summary Report later this year.

There will be further consultation in 2021, once the team have progressed the design and environmental assessment. A Review of Environmental Factors will be exhibited for consultation in mid-2021.

View map comments

Comment map closed as of 28 November 2020.

Thank you for your feedback.

We are collating feedback received from the community and will be publishing a Consultation Summary Report.

There will be further consultation in 2021, once the team have progressed the design and environmental assessment. A Review of Environmental Factors will be exhibited for consultation in mid-2021.

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Southern tunnel portal options

Northern tunnel portal option

What does the Strategic Design propose?

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Feedback category

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Feedback received

About the tunnel

Blackheath route options

Medlow Bath

Southern tunnel portal options

Northern tunnel portal option

What does the Strategic Design propose?

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Feedback category

Your feedback

Feedback received

Medlow Bath Consultation

Removal of traffic lights at Lancastrian Road intersection

Shared cycle and pedestrian pathways

Overview

Proposed route options for permanent shared cycle and pedestrian pathways

Temporary pedestrian and cycle paths during construction

Preserving open space

Tempe Dog Park

Land impacts

Environmental considerations

Project considerations

Airport East and North project

Reducing congestion on local roads

Botany Rail Line

Public transport

Connections to the Sydney motorway network

New connections to Sydney Airport terminals

Closure of Airport Drive

Increased capacity on new and existing roads

New Domestic terminals flyover

NSW Government infrastructure investments

Reducing trucks on local roads

Sydney Airport Ground Transport Interchange

Port Botany Rail Duplication

Proposed construction site

Proposed construction site

Traffic management

Preferred route

Staging of Airport Drive closure

Bridges and grade separations

The planning process

Environmental and social considerations

Airport overflow parking maintained

New Link Road

Virtual Information Sessions

Community Information Sessions

Katoomba Library

Lithgow Library Learning Centre

Oberon Library

Bathurst Regional Council

Orange City Library

Community Information Sessions

Great Western Highway upgrade - Contact us

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Blackheath

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