MOST states have that law - generally called the "Dead Red" law. Texas is a little different in that CERTAIN lights have to have sensors to detect motorcycles - but there is no definition to tell which lights and there is no way to know which ones are equipped that way. So Technically, in TX, we have to turn around and find a different route. How's that for screwy.
Must be the same guys trying to define an assault weapon that came up with that law