Philadelphia traffic really isn't that bad, according to a study conducted by GPS company TomTom that found that Philadelphia ranked 26th out of 60 major U.S. cities for traffic delays and 99th among major cities around the world.

According to the study, Philly riders can expect their 30-minute commute to be extended by 18 minutes each day, a total of 70 additional hours on the road each ear. Highways are generally less congested than non-highways, with 16 percent and 29 percent congestion for each respectively. Evening rush hour is the most congested time of the day in Philly, during which commuting time doubles. Monday sees the least congestion during the weekly evening commute while Friday sees the least congestion of the week during the morning commute.

In 2014, the TomTom traffic study says Jan. 21 was the city's most congested day. On Jan. 21, 2014, Mayor Michael Nutter declared a snow emergency in light of a storm that dropped over a foot of snow in some areas around the city.

Mexico City has the most congested traffic in North America with Los Angeles holding the top spot in the U.S. followed by San Francisco, Honolulu and New York City.