Infrastructure Australia added the New South Wales Government’s proposal for a second Sydney Harbour tunnel as a Priority Project on the Infrastructure Priority List. This proposal for a Western Harbour Tunnel and Warringah Freeway Upgrade aims to ease congestion on one of the Sydney’s busiest growth corridors. Our evaluation confirmed that delivering this proposal is a national priority. The proposal involves constructing a 6.5 km twin three-lane motorway from the Rozelle Interchange to the Warringah Freeway near North Sydney. It also includes an upgrade of the Warringah Freeway between the northern end of the Sydney Harbour Bridge and Willoughby Road. The Sydney Harbour Bridge and Sydney Harbour Tunnel are critical transport links – carrying more than 250,000 vehicles each weekday as people travel into the CBD and through to other parts of the city. By 2031, this is expected to increase to 300,000 as Sydney’s population grows. Without an additional harbour crossing, we expect additional traffic and delays around the Sydney CBD, impacting community access to schools, work and essential services. The 2019 Australian Infrastructure Audit found that congestion on this part of the road network could cost the NSW economy more than EUR500,000 (AUD780,000) per day by 2031. for further information please click au/42 for the tunnelbuilder archive and also visit https://www.infrastructureaustralia.gov.au. 19/21.