Further designs for level crossing removals in Werribee have been released.
An alliance of McConnell Dowell, Arup, Mott MacDonald, and Metro Trains Melbourne will deliver the project, which covers two level crossings.
The crossings are located at Old Geelong Road in Hoppers Crossing and Werribee Street in Werribee.
The $355.5 million worth of work will involve the construction of a road bridge near the current Old Geelong Road level crossing and a rail bridge over the Werribee Street level crossing.
The same alliance have been working on replacing the nearby Cherry Street level crossing.
A pedestrian overpass will replace the Old Geelong Road level crossing.
Freight services will be able to continue to run on the corridor on a temporary track.
The level crossing works will feed into further network improvements as part of the Western Rail Plan and Suburban Rail Loop.
New areas of open space will be created between Werribee Racecourse and Werribee River underneath the newly raised rail line.