In late march crews worked around the clock at the Evans Road level crossing in Lyndhurst to install seven giant bridge beams.
Works will start this month to set up site offices and prepare the area around the Werribee Street level crossing ahead of major works.
The Laing O’Rourke, Jacobs and Metro (MTM) Alliance are continuing with works to remove the Toorak Road Level Crossing.
Works are underway to remove three level crossings and build two new stations in Cheltenham and Mentone in south-east Melbourne.
Two alliances will work in partnership with the Level Crossing removal projects on a $679 million contract to duplicate the Cranbourne Line.