northbound lanes of I-95, unmarked silver/grey cronwn vic drives together with northbound traffic in the middle lane, giving tickets to drivers using the left lane. Unexplained "congestion" in middle and rightmost lane with bumper to bumper traffic, and leftmost lane of 3 lanes is wide open. Cop had been camping behind a large van, which was the 1st vehicle in a nearly 1 mile long convoy of vehicles.