The Diamond Creek Road intersection is now operating at full capacity and two lanes are open in each direction between Diamond Creek and Kurrak roads.
The intersections of Memorial Drive, River Avenue, Browns Lane, Kurrak Road, and the Nillumbik Shire Council Recycling and Recovery Centre have also had a makeover with traffic lights now operating, making it safer for all road users.
Doubling the number of lanes from two to four has delivered a huge boost to capacity for the 24,000 cars using this section of Yan Yean Road each day.
Stage 2 of the project will involve widening the road from one to two lanes in each direction between Kurrak and Bridge Inn roads, upgrading intersections with traffic lights and roundabouts, and building new walking and cycling paths along the entire road.
An Environment Effects Statement is being prepared, with planning approvals expected in 2020.
For more information visit the Major Road Projects Victoria website.