Lanes are currently closed on Route I-79 northbound between the Route 19 and Route 228 exits due to a motor vehicle accident.

Butler County 911 operators said a tractor-trailer was involved in a collision. One lane is currently open and traffic is being directed onto the shoulder of the road, according to dispatchers.

Traffic is projected to be heavy on Route 19 between Freeport Road in Marshall Township and Route 228, according to an alert on the Cranberry Township website.

Closure is possible through 5 p.m.