WestConnex projects

M4 Widening

Stretching 7.5km between Parramatta and Homebush and increased from six to eight lanes, the New M4 is an even faster way to bypass 28 sets of traffic lights on Parramatta Road and reduce travel times in the west. The New M4 has also been upgraded to have smoother road surfaces and, for the first time, motorists can now access the New M4 heading towards the city from the new Hill Road on-ramp, directly from Sydney Olympic Park. A distance-based toll applies for the upgraded section. The M4 west of Parramatta remains free.

New M4 Tunnels

The M4 project will extend the M4 Motorway in tunnels between Homebush and Haberfield via Concord, and includes provision for the future connection to M4–M5 Link. The project is about 6.5km long - with 5.5km of the motorway underground - making it the first underground section of WestConnex. It will connect to the widened M4 and extend it via twin motorway tunnels from Homebush to Haberfield with three lanes in each direction. The M4 will alleviate the frustrating delays and gridlock that motorists face daily when they come off the M4 and hit a standstill on Parramatta Road.

King Georges Road Interchange Upgrade

This included an upgrade of the King Georges Road interchange between the M5 West Motorway and the M5 East Motorway at Beverly Hills, in preparation for the New M5 project. Work was fast-tracked, and the upgraded interchange opened to traffic in December 2016

New M5

Duplicating the M5 East from King Georges Road Interchange Upgrade at Beverly Hills with twin motorway tunnels from Kingsgrove to a new interchange at St Peters. The St Peters Interchange includes connections to the Sydney Gateway and M4–M5 Link. The New M5 tunnels also include underground connection points for the M4-M5 Link and the proposed Southern Connector. The New M5 will provide twin underground motorway tunnels, nine kilometres long, from Kingsgrove to a new St Peters Interchange at the site of the old Alexandria landfill facility. The new interchange at St Peters will provide motorists with connections to Alexandria and Mascot.

M4-M5 Link Tunnels

The M4-M5 Link is the crucial final stage of WestConnex, connecting the New M4 at Haberfield with the New M5 at St Peters, allowing the full benefits of WestConnex to be realised. These tunnels will be approximately 7.5 kilometres long and able to accommodate up to four lanes of traffic in each direction, providing an underground bypass of the CBD. The M4-M5 Link project will be built in two stages:
Stage 1: The M4-M5 Link Tunnels
Stage 2: The M4-M5 Link Rozelle Interchange and Iron Cove Link 

M4-M5 Link Rozelle Interchange

Stage two, the Rozelle Interchange and Iron Cove Link, is the most complex stage of the M4-M5 Link, providing underground connections from the M4-M5 Link Tunnels to the surrounding road network and future Western Harbour Tunnel. It will include an underground tunnel from the Rozelle Interchange to Victoria Road near Iron Cove Bridge, known as the 'Iron Cove Link'
The interchange in Rozelle will be mostly underground and located at the site of the old Rozelle Rail Yards. By building the interchange mostly underground, the project will deliver new active transport options in Rozelle and up to 10 hectares of new green space.