Youngs Crossing upgrade, Joyner

Youngs Crossing Road closed due to flooding

Moreton Bay Regional Council is working to upgrade Youngs Crossing Road at Joyner where it crosses the North Pine River to improve its flood immunity, safety and vehicle carrying capacity given forecast growth in population, development and traffic volumes.

With the Youngs Crossing Road transport corridor being a critical link to the South East Queensland road network, this upgrade is one of the biggest road infrastructure projects to be delivered by Council and crucial to transport services within our region.

Through the early stages of the detailed design process, the alignment for the upgraded section of Youngs Crossing Road has been amended.

It still largely follows the existing Youngs Crossing Road alignment, which Council endorsed following community consultation last year. However, it will now be located slightly further to the west of the existing road.

The upgrade will now comprise of a single 212-metre bridge, spanning North Pine River and Sideling Creek. View the latest project newsletter(PDF, 4MB).

This alignment has been selected as it addresses some of the community suggestions and priorities raised during consultation last year, including:

  • improving environmental outcomes, including the opportunity to preserve the two large fig trees and reducing impact on the lowland forest area
  • ongoing use of and access to the water hole
  • minimising the impact on traffic during construction.

Amended alignment and key benefits

Concept alignment - Youngs Crossing Road Upgrade

Concept alignment of the new Youngs Crossing Road

Amended alignment of Youngs Crossing Road

Amended alignment - Youngs Crossing Road Upgrade

Circle indicates actual intersection location subject to detailed design process. Actual intersection location subject to detailed design process.
  1. Project now includes Protheroe Road intersection. The new signalised intersection will increase safety and assist traffic flows.
  2. Access to Youngs Crossing Park will be maintained via a four-way signalised intersection connecting to the waterhole and its car park.
  3. The amended alignment will seek to minimise impact to the waterhole and its surrounding park facilities, including existing public amenities.
  4. Overall environmental impacts are anticipated to be no worse than the concept alignment endorsed last year. The amended alignment avoids the large fig trees and is expected to reduce clearing of the lowland forest area.
  5. The road level at the northern edge of the Sideling Creek Bridge will be 700mm lower than the concept design adopted in November 2020, reducing required earthworks.
  6. Piers and piles will be designed to minimise hydraulic impacts to Sideling Creek, Pine Rivers Pony Club and Dayboro Road.
  7. Access to the Pine Rivers Pony Club via Youngs Crossing Road has been included. The Project Team will work closely with the club through the detailed design process.
  8. With the new carriageway running west of the existing roadway, construction work can largely occur offline in two stages, minimising disruptions, alterations and temporary works.

Next steps

With detailed design under way, on-site investigation work(PDF, 4MB) that has started or will commence over the coming months includes:

  • scanning, surveying and monitoring roadways, footpaths and open spaces
  • testing road pavement and ground conditions by drilling and cutting small diameter holes to collect soil and rock samples
  • environmental inspections and monitoring
  • identifying utility services using a high-pressure vacuum excavation truck
  • setting up safe work areas and traffic management.

More in-depth planning and design will be also be undertaken during this next phase including detailed environmental and cultural heritage assessments, road formation design, visual amenity considerations, constructability, noise abatement measures and traffic and road safety assessments.

As the project progresses, the project team will continue to engage with the community and stakeholders to work through project components and share the latest information and designs.

See FAQs for more information.

Minimising environmental impacts

The significance of koala populations and native flora and fauna in and around the project area are key considerations for Council and the community.

This project will affect some areas of environmental significance, mostly through the clearing of vegetation to accommodate the new bridge and its roadway.

To achieve the best outcome, Council is working to reduce these impacts as much as possible. This is reflected in the amended Youngs Crossing Road alignment, which:

  • provides the opportunity to preserve the two large fig trees
  • is expected to reduce impacts on lowland rainforest areas
  • maintains access and connectivity to Youngs Crossing Park’s waterhole.

Specialist environmental consultants have been engaged to assess the impacts and advise mitigation measures. Environment assessments undertaken so far include:

  • a preliminary environmental and cultural heritage assessment
  • impact assessments to identify plant and animal species of national significance
  • ecological survey of the vegetation
  • tree transplanting feasibility study.

Some of the mitigation measures Council will be exploring in more depth during the detailed design phase include the use of koala exclusion fencing and other wildlife movement infrastructure, replanting and propagating trees and vegetation and erosion/sediment controls.

Environmental impacts and cultural heritage assessments will be managed in line with Commonwealth and State legislation in addition to Council’s environment management framework.

Project funding

Over $68 million has now been committed to deliver the upgrade to this important regional transport corridor, with the Federal Government contributing $32.75 million. The State Government is also investing $350,000 to progress planning for the intersection upgrade at Youngs Crossing Road and Dayboro Road.

The project will be developed and scoped further as detailed design progresses over the coming months, with the construction tender to be confirmed towards the end of 2021/early 2022.

State Government-controlled Dayboro Road will need upgrading to four lanes between Youngs Crossing Road and Beeville Road at some stage in the future to cater for increased traffic volumes. This upgrade has been estimated to cost $18 million and will be the responsibility of the Department of Transport and Main Roads.

Project background information

Youngs Crossing Road is an important north-south arterial road connecting the Moreton Bay Region with Brisbane City.

The road is used by approximately 20,000 vehicles every day, and traffic is forecast to increase to 22,500 vehicles by 2026 and 27,500 vehicles by 2036.

Council has been progressively upgrading sections of Youngs Crossing Road to four lanes to cater for this growth.

Council began preliminary planning and design work in late 2019 to upgrade the road where it crosses the North Pine River at Youngs Crossing.

Youngs Crossing Road has low flood immunity and since 2010 has closed an average of 4.5 days a year following rain events and water releases from North Pine Dam, causing delays, congestion on local roads and economic impacts.

So far in 2021, Youngs Crossing Road was forced to close for almost 2.5 days in March, as well as a further 28 hours straight in April, due to flooding caused by heavy rain.

Last year Council developed concept designs for two proposed upgrade options as part of the project’s early planning and design phase and sought community feedback on these options:

Option 1 – Youngs Crossing Road existing alignment

Option 2 – Andrew Petrie Drive alignment

Council made a formal decision to select the Youngs Crossing Road alignment at the General Meeting held on the 12 November 2020.

You can view the Council briefing reports for more information about the project:


Youngs Crossing Road, Joyner 4500  View map

Google Map