Years ago during rush hours when traffic was congested, all the North/South signals and all the East/West signals were opposite colors and traffic was able to move quickly and safely in all four directions without any complicated timing problems. The speeds were greater than posted limits, but I'm betting that there were fewer accidents because everyone knew that the curb lanes were essentially turn lanes and through traffic avoided them. The safety issue with increased speeds is a sham - the real issue is reduced income from reduced traffic citations. The real solution to most of Houston's problems is to move and find work elsewhere.