Close call on 422

Had a huge Dump Truck come within a few inches of plowing into the back of my car, in Phoenixville, PA.

TRAFFIC ahead of me came to a sudden stop, but the Dump Truck behind me didn't see till it was too late.

I changed lanes, to get out of his way, and give him more room to stop, while he went onto the left shoulder of the road. Really close call.