Truck was driving erratically on the road to the point it was scaring our two young children. He was cutting people off and then slamming on his brakes in the fast lane holding up traffic and dropping down to dangerously low speeds. Her would then swerve in front of you if you tried to get around him in another lane. Did it to multiple cars while lowering his window and flicking everyone on the highway off. He almost hit multiple people as we also almoat hit him.