The M4-M5 Link Project is the final and most critical component of WestConnex

Stage one – construction of the M4-M5 Link Tunnels between the New M4 at Haberfield and the M8 at St Peters and stub tunnels to the Rozelle Interchange. This stage is being managed by WestConnex | Transurban.

Stage two – construction of the Rozelle Interchange and Iron Cove Link. This stage is being managed by Transport for New South Wales.

The M4-M5 Link Tunnels will be approximately 7.5kms long and accommodate up to four lanes of traffic in each direction.

Source: https://www.westconnex.com.au/