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Flagstaff Road Upgrade

About the project

The South Australian Government has announced $32.9 million in funding for the upgrade of Flagstaff Road, between Hyland Avenue and Bonneyview Road, by installing a fourth lane to make it a permanent two-way dual carriageway.

Flagstaff Road is a major arterial road used by approximately 21,000 motorists every day to commute to other parts of the city. For 800 metres of its overall 3.3 kilometre length between Hyland Avenue and Bonneyview Road, the road consists of only three lanes. Flow on the centre lane is reversed daily to cope with peak-hour traffic in the mornings and evenings. This is a potential cause of confusion for motorists travelling during these periods and remains a safety concern.

The additional lane will be installed as a permanent two-way dual carriageway to reduce traffic congestion, reduce confusion and improve efficiency and safety for motorists travelling on Flagstaff Road. It will provide room to overtake slow-moving traffic and allow emergency vehicles to proceed without being held up by other traffic.

Flagstaff Road map

DPTI COVID-19 Response

The Department will continue to tailor community engagement opportunities in line with the latest COVID-19 advice from health authorities.

Face-to-face engagement opportunities may be restricted and we will continue to be guided by the advice of health authorities, with the health and safety of our stakeholders always our highest priority.

Engagement with community and industry is crucial and we will facilitate information sessions as much as possible to enable face to face engagement.  It is important to assist in managing these events that you register as requested to enable physical distancing as much as possible.

What’s next?

The Department of Planning, Transport and Infrastructure (DPTI) is continuing to plan for the widening of Flagstaff Road, Darlington.

We have received valuable feedback from community and business owners from the surveys and information sessions held in December last year. This feedback has been provided to our engineering and design consultants for consideration as the preferred concept is developed.

Investigation works to inform the development of a design will commence in May, including:
- Location of underground services.
- Geotechnical drilling, and
- Flora and fauna assessments along the road corridor.

If access is required to any properties for these investigations, we will contact the residents or business owners and property owners to discuss the nature of the investigative works that are planned and to obtain permission prior to investigations commencing.

Once these investigations have been completed and a preferred concept design has been determined, we will come back to you and the community to provide information about the outcomes of the study and the preferred design.

Further information

If you have any questions or would like to register to receive project updates, please