The INRIX 2015 Traffic Scorecard analyzes and compares the state of traffic congestion in countries and 100 major metropolitan areas worldwide. The report reveals the cities most impacted by worsened traffic conditions are those that experienced the most economic improvement during the past year.

The key findings of the 2015 Traffic Scorecard provide a quantifiable benchmark for governments and cities in Europe and the U.S. to measure progress in improving urban mobility and track the impact of spending on smart city initiatives.

In the United States, the cities with the worst congestion are:

Rank City Hours Wasted in Traffic

1. Los Angeles, CA 81

2. Washington, DC 75

3. San Francisco, CA 75

4. Houston, TX 74

5. New York, NY 73

6. Seattle, WA 66

7. Boston, MA 64

8. Chicago, IL 60

9. Atlanta, GA 59

10. Honolulu, HI 49