I'd think the grooves would make the highway louder, not quieter. Of course if it were Lousy-ana, the grooves would be ridges and your tires would howl.
Texas does their roads well. My road trips to Amarillo and Austin were both very pleasant jaunts. When I crossed back into Loozy-ana, though, the car looked over its shoulder and whined, "Boss, do we have to do this?"