Driver with trailer plates U424900 trailer # 53322...

Driver with trailer plates U424900 trailer # 533220 almost slammed into my truck. We were traveling northbound on IH 35 in San Marcos TX around 4:40 on CST and driver was so distracted and not paying attention to traffic slowing down he swerved to the middle lane from slow lane to avoid hitting us. He's obviously not keeping clear distance. We don't drive like that in Texas!!