Work to duplicate and widen seven of Wyndham’s busiest roads will begin in a couple of months.

Further detail and timing on the $1.8 billion Western Roads package has been revealed, with the duplication of Dunnings and Palmers roads, between the Princes Freeway and Point Cook Road, to begin in May. The upgrade will include duplicating Dunnings Road from two to four lanes, and Palmers Road from two to six lanes, including a bus lane.

Other works include:

•Duplicating Derrimut Road between Sayers and Dohertys roads from two lanes to four lanes (work to begin in May);

•Duplicating Leakes Road between Fitzgerald and Derrimut roads from two lanes to four lanes, and up to 12 intersection upgrades (work to begin in June);

•Duplicating Dohertys Road between Foundation Road and Palmers Road from two to four lanes, and installing traffic lights at Port Phillip prison (works to begin in July);

•Duplicating Dohertys Road between Fitzgerald Road and Grieve Parade from two lanes to four, and widening the bridge over the Princes Freeway (work to begin in July);

•Constructing new westerly-oriented entry and exit ramps from Princes Freeway to Duncans Road and replacing the existing bridge over Princes Freeway (work to begin in August);

•Duplicating Palmers Road between Princes Freeway West and the Western Freeway with two lanes each way (works to being in December); and

•Duplicating Forsyth Road to four lanes, including realigning Forsyth and Old Geelong roads, and widening the Forsyth Road bridge (works to begin January 2019).

Frank De Santis from VicRoads said all works were expected to be complete by the end of 2021.

Wyndham mayor Peter Maynard said the council had flagged concerns about the sequencing of works with both VicRoads and Netflow.

“While we appreciate the state government’s investment in local roads, we will continue to advocate for further upgrades.”