Terrible drivers, 1/31 1:00 pm Northbound I-35 sou...

Terrible drivers, 1/31 1:00 pm Northbound I-35 south of Waco, truck was aggressively tailgating a car in the left lane where no trucks in left lane signs are. Then a few miles later he s going slow holding up fast lane traffic and people are angrily changing lanes to pass him. WTH is he doing?