In 2021 City of Onkaparinga undertook an audit of the intersections on Main Road between the McLaren Vale and Willunga townships following a series of three fatal and serious injury crashes along this road. On completion of the audit a broader assessment was undertaken across the broader McLaren Vale Wine Region, identifying a total of 21 intersections with an elevated risk of crashes and associated road trauma. The City of Onkaparinga then advocated for State Government funding for upgrades to improve safety at these intersections and Leon Bignell subsequently made a state government election commitment of $4.2 million to deliver these upgrades.

Both the State Department for Infrastructure and Transport (DIT) and City of Onkaparinga have individual and shared responsibility for roads in the area, with the DIT responsible for roads such as Main and Aldinga Roads, while council is responsible for adjoining local roads.

Council and DIT have been working collaboratively to determine the most appropriate design treatments to improve safety. This includes the use innovative solutions to reduce the potential for crashes. Follow the link to view a map of the 21 Intersections.