A Iowa State Patrol squad car was hit while a trooper was working the scene of another crash on Interstate 80 west of West Branch.

No one was injured, but traffic is blocked in the left lane and is backed up and slowed west of West Branch, Trooper Dan Loussaert reported in an email. He reports incidents of black ice in the area. (Update:  All lanes are open on I-80 near West Branch but westbound traffic is backed up and slow.)

Also eastbound traffic on I-80 is slowed near Williamsburg because of an overturned semi.