There is no speed limit in Austin. The police never set up speed traps, so the speed limit signs are just a suggestion. People in my area average about 15 over the limit, even on residential streets. People resort to putting out flags and warning signs when their kids are riding bikes. Even if you're going 15 over, people still ride your bumper like you're towing them with a short rope. People pass in turn lanes, exit lanes, bike lanes, and on the shoulder. They don't know how to handle four-way stops. No one uses a signal. Red lights have become yellow lights, I routinely see three cars go through a red before someone stops (they installed red light cameras, but they were all removed due to public outcry). People do four-lane lane changes to enter/exit a freeway. People pulling out onto a busy street will try to cross four lanes of gridlock traffic, blocking 2-3 lanes in the process, rather than pull into the nearest lane. Drivers jump the double-white lines on a ramp to try to get ahead of the drivers in front of them, then get all pissed off when those drivers follow the law. Everybody is staring at their phones non-stop despite it being illegal.
In the last four years we've had a car totaled in a hit-and-run, another totaled by a texting teenager, and a third damaged by a GPS distracted driver (she tried to take a right turn from the middle lane right into me). You REALLY have to drive defensively here.