Driver was texting, reaching down to floor of passenger side while driving without looking at road, windshield wipers going full speed when it wasnt raining, had blinker on for 15+ miles, weaving in and out of lanes, driving between the 2 lanes up the middle of stopped traffic to evade traffic jam, driving up shoulders for a few miles to cut around, tailgating, driving up off-ramp then cutting across median to cut-off traffic, accelerating aggressively while distracted then coming to quick stop. This went on consistently for about 30 mins/15 miles. Almost hit at least 20 cars that we witnessed.