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Interstate 10

Houston, Texas

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The Top 15 Busiest Highways in the U.S.

The fourth-longest route in the Interstate Highway System, I-10 is the main interstate crossing the southern U.S.

From where it meets California Route 1 in Santa Monica, I-10 extends 2,640 miles to Jacksonville, Florida, including an 880-mile stretch through Texas. The portion of I-10 passing through Houston is one of the nation's most traffic-clogged highways. Known locally as the Katy Freeway, it is also one of the widest roads in the world, spanning a staggering 26 lanes of traffic. Over 320,000 vehicles use it daily, making this the busiest road in the Lone Star State.

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It may seem like airfares are constantly on the rise, but there are still plenty of tips and tricks you can employ to score a great deal. That starts by flying out of the right airport — and to help your search, we've compiled the five cheapest and five most expensive airports to fly from, based on data from the Bureau of Transportation Statistics.

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