A new roundabout at Geddes and Ridge roads in Superior Township has partially opened to traffic, officials announced Monday.

The intersection has been closed since June as crews contracted by the Washtenaw County Road Commission converted the four-way stop into a single-lane roundabout.

The roundabout is "substantially complete" and is open to traffic in all directions except for northbound Ridge Road north of the intersection, Road Commission officials said.

That lane remains closed to drivers as work continues.

The majority of the $1.1 million project was paid for by South Pointe Scholars Charter Academy, which is located at the intersection at 10550 Geddes Road.

As a condition of the construction of access driveways to the school, the charter academy agreed to pay for the roundabout's construction.

The project was supposed to be completed by the end of August so as not to affect traffic on the first day of school, but construction delays pushed the project into the first weeks of September.

Because the project is behind schedule, the contractor, Fonson Inc. of Brighton, will be paid $1,300 less of its contract award amount for each calendar day past the deadline that the project is not complete.

GM & Sons, Inc. of Whitmore Lake is the subcontractor doing the concrete paving.

View Geddes and Ridge roads in a larger map

Amy Biolchini is the K-12 education reporter for AnnArbor.com. Reach her at (734) 623-2552, amybiolchini@annarbor.com or on Twitter.