Need to change traffic signals to allow a sensible number of cars through a light before switching. Moving cars have inertia, and changing lights every few seconds to let 5 or 10 cars through only encourages people to run them when there are many stacked up. People go crazy when they wait through a light 3 to 5 times, or more. If a lot of cars are stacked up, let them all go through and then change the light. Then let them wait for the next turn. I came from LA area 20 years ago and that is something they figured out, and they have worse traffic than Austin.