This toll road is to be named after a former speaker of the house.
See http://www.tollroadsnews.com/node/4183 (http://www.tollroadsnews.com/node/4183) for details.
Way before the news noticed this, it was already signed. I take it on the way to work if the other freeway is backed up and was pleasantly surprised to see the new signs posted!
The less arch-conservative counties (Dallas, Tarrant) represented on the board outvoted the conservative suburban counties to name this after him and pissed off the suburbanites quite a bit - because Rayburn was a Democrat. Democrats of the 1950s were nothing like the ones today but evidently that doesnt matter.