Garfield Road East Upgrade

  • Snapshot

Garfield Road East is a key arterial connecting the growth suburbs of Riverstone and Box Hill in Sydney’s North West. Transport for NSW is upgrading 3.4 kilometres of the corridor - between Piccadilly Street, Riverstone and Windsor Road, Box Hill - widening it from two lanes to four to support one of the fastest-growing parts of greater Sydney.

Turnbull Engineering delivered the Reference Design that is informing the project’s delivery phase.

  • Location
    Riverstone to Box Hill, Sydney’s North West (NSW)

  • Client
    Transport for NSW

  • Turnbull’s role
    Reference Design

  • Funding
    $440 million (NSW and Australian governments)

  • Reference Design
    Awarded 2025

  • Construction
    2026 – 2029 (expected)

Project Overview

The $440 million upgrade, jointly funded by the NSW and Australian governments, will widen the existing two-lane road to four lanes - two in each direction - with a central median, add new and upgraded signalised intersections, and deliver active-transport and public-transport improvements along the corridor.

A key objective is to keep Garfield Road East functioning as a viable flood evacuation route for the region. Turnbull delivered the Reference Design, awarded in 2025, with construction expected to run from 2026 to 2029.

 
 

  • Reference design Scope

Services

As reference designer, Turnbull developed the design that informs the project’s delivery. The reference design addressed the corridor across all disciplines, including:

 

  • Widening from two to four lanes with a central median

  • New and upgraded signalised intersections

  • A new bridge over First Ponds Creek

  • Drainage and flood design to keep the corridor a viable flood evacuation route

  • A footpath and shared path for pedestrians and cyclists

  • Bus bays, bus priority at signals and bus lanes

  • Utility relocation and coordination

Project Highlights

  • Reference design for a $440M build

    Turnbull delivered the reference design, awarded in 2025, that sets up the project’s design-and-construct delivery phase.

  • Enabling Sydney’s North West

    The corridor serves the rapidly growing Blacktown, Hawkesbury and The Hills districts, where the population is projected to grow by around 300,000 — reaching about 1.1 million by 2036.

  • More than a road widening

    Beyond extra lanes, the upgrade adds signalised intersections, a footpath and shared path, and bus priority and bus lanes to improve services for all road users.

  • Built for flood resilience

    Drainage and design improvements keep Garfield Road East usable as a flood evacuation route for the region in extreme storm events.

By the numbers

3.4 km

corridor upgraded

$440M

Joint NSW + Federal Funding

4 → 6

lanes (3 each way)

300,000+

more residnets by 2036

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