Texas Transportation Code - TRANSP § 547.501. has a lot to say concerning "audible warning devices". Have a seat and get ready, because Texas law has a lot to say about horns.
Killeen, like any town, has its fair share of dangerous intersections. These are the ones where you're most likely to end up in a crash if you aren't careful.
In the state of Texas, "impeding the flow of traffic in the left lane is punishable by a fine of up to $200." In other words, its against the law people. So, why aren't you moving over when other drivers get behind you?
TomTom released the results of their "United States of America traffic" report, which shows the cities in the U.S. with the worst traffic. Texas' worst is no surprise.