There was a vehicle accident Monday morning in the partially completed roundabout at the intersection of Highways 154 and 246.
CHP officers were still en route as of 11:40 a.m., Officer John Ortega said.
A CalStar helicopter was initially called to the scene but the call changed to a non-injury accident, according to the CHP.
The intersection in the Santa Ynez Valley was changed to a roundabout from a four-way stop and opened to traffic last week.
Daytime lane closures are ongoing as other parts of the construction project are completed, according to Caltrans.
Check back with Noozhawk for updates to this story.