LOS ANGELES (CBSLA.com) — The City of Angels has the worst traffic in the nation, according to a new report by GPS navigation company Tom Tom.

On average, drivers spend 90 hours a year on congested roads and freeways, the study found.

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The Tom Tom North American Congestion Index, released Wednesday, found LA roadways were the worst on Thursday mornings and Friday evenings.

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The best times to drive with the least congestion were Monday evening and Friday morning.

Los Angeles traffic increased two percent, the highest level in five years, the report found.

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San Francisco was the only other California city to make the list at number six.