From this week's public meeting: The widening of Sunningdale from Wonderland to the Medway Creek Bridge will start next year, and Sunningdale from Richmond to the Medway Creek Bridge will start in 2027.
The widening includes sidewalks and bike paths on both sides, a pathway underneath the Medway Creek Bridge, and a traffic signal at Sunningdale and Meadowlands Way.
The Medway Creek Bridge replacement will also start next year and will take two construction seasons (2026 and 2027). The Medway Creek Bridge will be closed throughout the entire construction duration.
It was also mentioned during the meeting that since the grade of the bridge will be raised about 3.5 to 4 metres, they will not be able to stage the work that would allow
for the existing bridge to remain open, even in between the construction seasons. This effectively means that Sunningdale will be closed from Richmond to Wonderland for about 2 years.
https://getinvolved.london.ca/50528/widgets/214946/documents/162685
Here are some renderings. We start at the Wonderland roundabout and head east near Richmond.