Castle Hill - Showground Road

Roads and Maritime Services is upgrading Showground Road between Carrington Road and Old Northern Road, Castle Hill from a two lane to a four lane divided road to reduce congestion and increase traffic capacity to meet predicted growth from development in the area.

Roads and Maritime engaged Seymour Whyte Constructions as the contractor to deliver this critical upgrade. Major construction started in late May 2016.

Updates and announcements

Kentwell Avenue to Pennant Street upgrade

The first section of the Showground Road upgrade between Carrington Road and Kentwell Avenue, Castle Hill has been completed. The section has been upgraded from a two lane to a four lane divided road to reduce congestion and increase traffic capacity to meet predicted growth from development in the area.

Due to the re-development of the Castle Towers Shopping Centre (owned by Queensland Investment Corporation - QIC), Roads and Maritime has postponed the construction work from Kentwell Avenue to Pennant Street until late 2018. The re-development of the shopping centre has resulted in the changed alignment of the Showground Road and Pennant Street intersection.

On completion, the Showground Road will be upgraded to two lanes each way from Old Northern Road. The existing shoulder pavement at Kentwell Avenue is not sufficient to support current traffic loading to run two lanes each way.

However as a temporary measure, the existing east bound pavement shoulder is strengthened to allow two lanes on East bound direction. This arrangement will be ceased once the Showground Road Stage 2 construction work commences from Kentwell Avenue to Pennant Street.

This section of the Showground Road upgrade is expected to be completed by late 2019.

Once the road construction from Kentwell Avenue to Pennant Street is completed, the community will enjoy the benefits of the project which include reduced congestion, and increased traffic capacity to meet predicted growth from development in the area and improving safety at several intersections.

What have we done?

  • 7.2 kilometres of underground cabling laid
  • 1.9 kilometres of drainage pipes laid
  • 11,200 cubic metres of earthworks moved
  • 15,300 tonnes of stabilised material placed
  • 20,000 square metres of existing asphalt removed
  • 17,000 tonnes of asphalt laid
  • 42.5 kilometres of line marking completed
  • 6,500 square metres of concrete laid for footpaths and driveways

Key benefits

The benefits of the project include:

  • Reducing congestion
  • Increasing traffic capacity to meet the predicted growth from development in the area
  • Improving safety at several intersections.

Key features

  • Widening of Showground Road to at least four lanes between Carrington Road and Old Northern Road with additional turning lanes at key intersections
  • Upgrading the intersection of Showground Road and Pennant Street to include additional turning lanes and a bus priority measure
  • Installing new traffic lights at the intersections of Showground Road with Rowallan Avenue and Cheriton Avenue
  • Changing the intersection of Showground Road and Britannia Road to left-in/left-out access
  • Installing a central concrete median with landscaped planter bays at a number of locations along the road
  • Providing a concrete footpath to both sides of the road between Carrington Road and Pennant Street.

Voluntary Planning Agreement

In September 2013, a Voluntary Planning Agreement for the Showground Road widening was formally executed by Roads and Maritime, The Hills Shire Council and the developer of Castle Towers Shopping Centre, QIC. A second Voluntary Planning Agreement is currently being finalised resulting from changes during the detailed design phase of the project.

Community engagement

We consulted with the community and stakeholders on the concept design and Review of Environmental Factors in March 2014. We received 16 submissions and overall there was support for the upgrade.

Changes to the project

Some changes to the project were made during the detailed design phase and an addendum Review of Environmental Factors was prepared. The following changes have been made to the project:

  • Hills Shire Council has agreed that access between Showground Road and Kentwell Avenue be closed pending the future development of the Queensland Investment Corporation (QIC) land to the north
  • Changes to the southern end of Kentwell Avenue have also been made to allow garbage trucks and emergency services vehicles to turn around. The traffic lights at the intersection of Showground Road and Cheriton Avenue will still allow access into and out of Cheriton Avenue
  • Access from Cecil Avenue into Rowallan Avenue is currently difficult due to the large volume of through traffic along Showground Road which limits the dog‑leg movement through this intersection. This manoeuvre will be banned. The addition of a new westbound lane on Showground Road will make this movement unsafe. As a result, motorists are to use the intersection of Showground Road and Cheriton Avenue to access the right turn lane from Showground Road into Rowallan Avenue
  • Removing bus priority measures in the eastbound direction at the intersections of Showground Road with Kentwell Avenue and Pennant Street pending the future development of the QIC land to the north
  • Providing site office / compound locations including:
    • Castle Hill Showground will be used for a site office, worker amenities, storage of plant and equipment and minor stockpiling
    • QIC construction land near Kentwell Avenue pending the resolution of the Voluntary Planning Agreement between Roads and Maritime, Hills Shire Council and QIC
  • Any clean, excess spoil from construction will be stockpiled at 10 Balmoral Road, Kellyville for the Hills Shire Council to use at the site. Fourteen trees on the site will be removed to allow safe heavy vehicle access and for storage of material
    • Fencing will be installed to secure the site
    • Due to the narrow corridor width, we will now be providing a two metre wide footpath instead of a 2.5 metre wide shared path on the northern side of Showground Road, between Carrington Road and Pennant Street. The Hills Shire Council will consider options for connectivity between their shared paths as development continues along the corridor which may allow for a wider pathway in the future
    • Final bus stop locations have been moved slightly to allow buses to stop safely within the road shoulders. Two new temporary bus stops on Showground Road, west of Carrington Road will be installed during construction to improve access to bus services on the western part of Showground Road. Bus stops will need to be consolidated during construction. Please refer to the map for the updated temporary bus stop locations
    • Removal of 15 additional trees on private property likely to be affected by construction. Additional trees on Showground Road will require supervision by an arborist during construction and utility trenching to confirm if they can be retained
    • Reconnection of power to nearby properties using private poles.

Further information on the design changes is available in the addendum Review of Environmental Factors which is available on the project documents page.

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