The change was mostly attributed to businesses being shut down and more people working from home during the COVID-19 pandemic.
According to the annual Texas A&M Urban Mobility Report, the New York-Newark area was the most congested.
The Los Angeles area was ranked No. 2.
Individually, drivers in the Los Angeles-Long Beach-Anaheim area spent about 46 hours in traffic last year, down from about 119 hours two years ago.