I commuted (like a few days a month for a year when I had to travel for business) briefly in north Austin and kept finding roads with bike lanes that ended randomly so you had to either merge with traffic going 45mph or turn around. Not fun. And the heat/humidity is downright hostile. Expect to take a bath in your own sweat every time you head out - I think I took at least 3 showers a day when I was down there.