Train services on the Altona Loop will resume a week ahead of schedule, after a 43-day construction blitz to remove the Kororoit Creek level crossing.

A new dual-rail bridge and duplicated section of track has been built between the Werribee line junction and Kororoit Creek, allowing trains to safely pass one another as vehicles pass through the free-flowing road below.

The dual rail bridge is made up of 40 L-shaped concrete beams up to 31 metres long.

More than 70,000 hours have been worked by 750 workers during the construction blitz, with more than 7,000 tonnes of concrete used and 12km of cabling laid.

The removal of the Kororoit Creek level crossing, takes the total number of crossings removed by the Level Crossing Removal Authority to 26.