10. San Francisco, US
Being a financial and cultural hub the city has therefore turned out to be one of the densely settled cities of California.
And ultimately the result is 25 percent increase in traffic congestion compared to last year.
It has been found that the most congested area in San Francisco is the San Francisco-Oakland area which is also considered as one of second most congested area in the country where a commuter usually waste around 67 hours in a year struck in traffic.