Monstrous traffic invariably accompanies the holidays and with the Thanksgiving weekend just lurking around, here's some useful information on how to beat inconveniences on the road.

A study released by INRIX  says that San Francisco tops the list of U.S. cities with the busiest traffic a day before Thanksgiving. Next on the list are Los Angeles, Seattle and San Diego, filling up the second to the fourth spot, respectively.

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On November 25, it will take 44 percent longer to leave town compared to a regular Wednesday traffic, so hit the road earlier to make it to your destination on time.

The study also reveals that the traffic will be at its heaviest from noon until 6 p.m., peaking at 2:30 p.m. to 4:30 p.m.

The common perception about traffic during the Thanksgiving weekend is that shoppers will go early in order to get the best deals in malls and shopping centers.

The INRIX report reveals that this is a myth. Instead, it shows that shopping activities are at their peak in the early afternoon, from 12:00 noon to 3:00 p.m.

As for airport traffic, the Chicago O'Hare airport is expected to be congested with estimated delay of around 50 minutes. The JFK airport in New York comes in second with 36 minutes estimated delay, and the Las Vegas airport is on third spot with 30 minutes estimated delay.

Apart from hitting the road early, experts advise travelers that planning one's route ahead would be a big help.

Mark Arum of WSB 24-Hour Traffic Center told AJC, "Plan ahead where you are going to park your car, or take MARTA to save time. Scout out which security line is the shortest. Oftentimes one line is a lot less crowded that the others."

TagsThanksgiving, Thanksgiving weekend, Thanksgiving traffic, traffic jam, traffic update, Thanksgiving update