Los Angeles has the worst traffic

A drive home from USC takes anywhere from 30 minutes to 2 hours, depending on traffic. According to Yahoo:

…the cities having the worst traffic problems are:

1. Los Angeles, Long Beach, Santa Ana, Calif.
2. San Francisco, Oakland, Calif.
3. Washington, D.C.
4. Atlanta
5. Houston
6. Dallas, Fort Worth, Arlington, Tex.
7. Chicago.
8. Detroit
9. Riverside, San Bernardino, Calif.
9. Orlando, Fla.
11. San Jose, Calif.
12. San Diego

California has a decided edge in winning the award for the worst traffic, since five of its cities (or city regions) make the top 12 list. Several of the cities mentioned are well known as trucking, rail, air and sometimes sea hubs for logistics. The convergence of services taxes the infrastructure.