Though, the 3,198 mile (5,148 km) route has been adjusted numerous times since 1936.
Technically, many sections have been absorbed into new highways or run a ‘parallel’ path. It’s usually much longer than the newer routes.
Source: www.corcohighways.org
Yet, it is still heavily used either for nostalgic reasons. Another reason, it connects 6 major cities and/or other interstate highways.
With all this added traffic makes it for a potentially hazardous journey because of the road is extremely curvy.
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Additionally the weather conditions (snow and ice) and wildlife crossing adds to the dangers. A common bumper sticker says, “I drive 6 Pray for Me.”
13. US 129 in North Carolina
US Route 129 (US 129) runs for almost 582 miles (937 km) from Chiefland Florida to Knoxville, Tennessee.
This is a fairly remote and lightly populated/developed stretch of highway. It is also a very popular destination for motorcyclist and sports car enthusiast.
Source: www.2wheeltuesday.com
There is an 11 mile section at Deals Gap (the Tennessee and North Carolina state line), called the Tail of the Dragon, The Dragon’s Tail, or simply The Dragon. It boasts an amazing 318 curves, making it possibly the curviest section of highway in the United States. It is highly recommended to travel slowly and to remain in your lane along this short section.
Honorable mention: US Route 1 in Maine
US Route 1 runs parallel to I-95 (its farther west inland). Completed in 1926 it runs 2,369 miles (3,813 km), from Fort Kent, Maine (the US/Canada Border) south to Key West, Florida. Many sections of the highway run close to the Atlantic Ocean.