It happened in New Canaan on Ponus Ridge Road around 5:30 a.m., Monday, May 9.
The crash, which is under investigation, caused a utility pole to snap, which caused the road closure as Eversource worked to replace it, said Lt. Jason Ferraro, of the New Canaan Police.
The driver, who was not identified, was transported to an area hospital. The extent of their injuries was unknown.
This is a developing story. Check back to Daily Voice for updates.
Click here to follow Daily Voice Darien and receive free news updates.