Motorists completing the whole length will endure 90 miles without a single deviation. Interstate 80 crosses the Bonneville Salt Flats in Utah, which, as the name suggests, are as flat as the road is straight.
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Saudi Arabia's Highway 10 is the world's longest stretch of completely straight road, StepFeed reported. The highway that stretches from Haradh to Al Batha is around 256 kilometres and cuts through the Rub Al-Khali desert.
The longest straight stretch of Interstate anywhere in the Interstate Highway System is the approximately 72 miles (116 km) of I-80 occurring between exit 318 in the Grand Island area and milemarker 390 near Lincoln. Along this length, the road does not vary from an ideally straight line by more than a few yards.
Route 66 became a popular route because of the active promotion of the U.S 66 Highway Association, which advertised it as “the shortest, best and most scenic route from Chicago through St. Louis to Los Angeles.”
North Dakota claims its Highway 46 is the longest straight road in the US and Canada. Slight bends aside, the motorway boasts a 31-mile dead straight stretch from Gackle to Beaver Greek. However, the aforementioned Bonneville Salt Flat road is meant to be longer, at 35 miles.
The straightest interstate is a dry lake bed in Utah.There are more than thirty miles of Interstate 80 across the Bonneville Salt Flats in Utah that are straighter than either of those—and flat as a pancake to boot, if you're looking to travel in a straight line in all three dimensions.
The A1 also known as the Great North Road is the longest numbered road in the United Kingdom, at 410 miles (660 km). It connects London, the capital of England, with Edinburgh, the capital of Scotland.
I-95 at SR 4When it comes to congestion, Fort Lee takes the top prize for having the busiest highway in the USA. The average speed on the highway is just 29 miles per hour, which is the second slowest on our list. Overall though, this is the most congested stretch of highway in America, avoid it at all costs.
The answer to the trivia question of which is the loneliest road in the United States: James W.Dalton Highway, which spans 414 miles between Fairbanks and Deadhorse in Alaska. An interactive map allows exploration of the loneliest road in all 50 states.
Hardknott Pass is considered to be one of the most challenging in the UK. It has earned this consideration due to its series of hairpin bends and the high risk of ice on the road. It is a steep, twisting, single-track road that cuts right through the heart of the Lake District between the Duddon Valley and Eskdale.