Construction of the Thompsons Road Upgrade started in early-2017 and includes:

• Duplicating a 10.7km stretch of Thompsons Road between Dandenong-Frankston Road and Berwick-Cranbourne Road
• Removing the level crossing near Merinda Park Station by constructing two bridges over the Cranbourne rail line, with three lanes in each direction and shared use walking and cycling paths.

The duplication is expected to be complete in mid-2019 and involves:

• Providing at least two traffic lanes in each direction
• Adding an additional lane in each direction between Dandenong-Frankston Road and Marriott Boulevard, and between Narre Warren-Cranbourne Road and Berwick-Cranbourne Road
• Replacing the roundabout at Western Port Highway  with traffic lights
• Replacing the roundabout at McCormicks Road with traffic lights
• Building up to 10.7km of shared walking and cycling paths.

As part of the Level Crossing Removal Project, the northern bridge opened on 24 June 2018. Traffic on Thompsons Road is flowing with one lane in each direction between South Gippsland Highway and Marriott Boulevard. Works to build the southern bridge and new traffic lanes will continue to take place.

The Victorian Government has committed $207 million towards this project, including $64 million to remove the level crossing and $143 million for extra lanes on Thompsons Road.