What cities are these? Most of the large southern cities I'm aware have terrible traffic. Atlanta, Houston, Dallas, Austin, Tampa, Nashville--they all score terribly for traffic.

The only reason they don't rank at the very top is because they are in fairly low population density areas.

Terrible relative to where? Austin has an average commute of 25 min. Stockholm is 34 minutes: https://www.thelocal.se/20120528/41090. London is 37 minutes each way: https://www.businessleader.co.uk/how-long-is-the-daily-work-....

Other US cities. According to this article Austin is the 14th most congested city in the US.

http://www.businessinsider.com/us-cities-with-most-traffic-2...