M1 Pacific Motorway, Tuggerah Interchange
The Tuggerah interchange provides access to Tuggerah and Wyong from the M1 Pacific Motorway. These important centres on the NSW Central Coast have experienced a high level of growth, with decreased performance and safety at the interchange. The interchange had also become popular as an informal site for commuters carpooling to Newcastle and Sydney.
The project scope included a northbound ramp onto the M1 beneath the existing bridge abutment, a roundabout on Wyong Road to improve the performance of southbound traffic and a 50-space paved carpark to the northwest of the interchange.
The solution required careful consideration to the three-dimensional resolution of walls and batters in the new design.
The existing character of the interchange is formed from a mix of tall remnant and semimature native forest and cleared grazing land, with forest covered ridgelines to the south and west. The solution aimed to use the existing vegetation as much as possible as a backdrop to the design, and provide welcome shade to the commuter car park.