NIGHT works will occur at several sites across the Mitchell Freeway extension project this month.
To allow for construction on Wanneroo Road, the speed limit will be reduced to 40km/h between Hall Road and Flynn Drive from 7pm-5am nightly until May 31.
Once works are completed, Wanneroo Road will have a modified layout and a 60km/h limit.
There will also be intermittent night works on Hester Avenue between Wanneroo Road and the Joondalup train line until late May and at the Hester Avenue and Ridgewood Boulevard intersection until early June.
Speed limits will be reduced to 40km/h in both areas.