Is Route 66 and i40 the same?

Completed in 1926, Route 66 winds 2,448 miles from Chicago to L.A. Through most of the Western states, Route 66 follows Interstate 40, which eventually replaced much of the Mother Road. In some areas, the remnants of 66 parallel the interstate as a frontage road.



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Portions of the road have now been designated as National Scenic Byways or as “Historic Route 66” in several states including Arizona, New Mexico, Illinois, and Missouri. Vintage Shell gas station (left) built in 1926 on Route 66 in Mount Olive, Illinois (photo taken between 1980 and 2006).

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Route 66's popularity led to its downfall, with traffic swelling beyond its two-lane capacity. In 1956, legislation created the Interstate System, and over the course of three decades, five separate interstates bypassed segment after segment of Route 66.

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Interstate 40 subsequently replaced a large segment of Route 66 and the roadway was decommissioned in 1985. However, in the aftermath, a variety of non-profit groups were formed to help preserve the historic highway and much of Route 66 remains drivable today.

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Although it is no longer possible to drive US 66 uninterrupted all the way from Chicago to Los Angeles, much of the original route and alternate alignments are still drivable with careful planning. Some stretches are quite well preserved, including one between Springfield, Missouri, and Tulsa, Oklahoma.

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Of the original 2,448 miles that made up Route 66, about 80-85% is still drivable.

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If you to travel the most famous routes, you will need a sedan or city SUV. If you want to use the oldest routes, definitely choose a SUV 4×4 with a high chassis. Don't forget about the passengers – if there are more of you, choose the car size that provides enough comfort to everyone.

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Jericho Gap, Texas This became so profitable that there were rumors that some residents watered down the road to increase the plight of Route 66 travelers. Eventually, Route 66 was rerouted to higher ground in the 1930s and the area dwindled into a ghost town.

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As with the Grand Canyon, Las Vegas isn't considered part of the original Route 66. But, it's a city you might be keen to experience at least once, and it's close enough (five hours' drive) to the canyon. En route is Seligman, a classic Route 66 town of traditional motels, diners, shops and flashing neon signs.

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Practicalities of driving Route 66 You need around three weeks to complete Route 66. There is no perfect time to drive Route 66. Due to its sheer size, you're likely to experience some adverse weather conditions, whatever the month.

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Only one state, Montana, is left unspoiled with no daytime speed limit. At night, speeds are restricted to 65 mph on interstate highways and 55 mph on two-lanes.

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