According to the Times News, the incident happened Thursday around 10am, on Lakeside Ave, on the "Horseshoe Curve" in Delano Township.
Two vehicles had lost control and were involved in a minor accident and were parked along the berm of the road. The PennDOT truck driver then came upon the same area and lost control and struck the two vehicles.
No injuries were reported.
The PennDOT truck and one of the vehicles suffered minor damage while the other suffered heavy damage.
Link to Times News
http://www.tnonline.com/2015/mar/06/penndot-plow-truck-strikes-two-vehicles