I saw this article along with some photos of an ice storm who had hit San Antonio. http://www.mysanantonio.com/news/local/traffic/article/TxDOT-images-San-Antonio-eerily-empty-roads-ice-12501523.php
I'm in Houston the past two weeks, and the roads were comparatively empty today. I-10 and the frontage roads were quiet.
Once a man with a star on his chest and large hat appeared on TV suggested staying off the roads, we went back to our hotels. :)