UPDATE: Pregnant woman OK after crash on Hwy. 101, CHP says

UPDATE 5:45 p.m: The CHP released additional details on the traffic collision on Highway 101 south of Atascadero on Wednesday afternoon.

Around 2:30 p.m., the driver of a Toyota Prius slammed into the back of a Nissan Frontier pickup truck that had slowed or stopped in southbound traffic.

The pickup, in turn, was bumped into the back of a Cadillac Escalade directly in front of it, CHP Officer Todd Cookston said.

Cookston confirmed that the pregnant woman was in the second car but didn't report any injuries. She was taken to a local hospital as a precaution, he said.

The incident, which occurred in a Caltrans construction zone, put traffic at a standstill for more than an hour, causing many motorists to reroute to Highway 41 to avoid the jam.

Original story: A pregnant woman was taken by ambulance to a local hospital Wednesday after a traffic collision on Highway 101 south of Atascadero, according to the California Highway Patrol.

Few details were available since officers are still on scene, but it appears that around 2:30 p.m., two vehicles collided due to traffic backing up in a construction zone just south of Santa Barbara Road, officials said.

It's unclear whether the woman, whose name and age were not disclosed, was taken to the hospital for minor injuries or as a precaution. Officials were working to clear the roadway as of 3:45 p.m.