History
Interstate 77 was not part of the original plans for 714 miles (1,149 km) of the nation's Interstate Highway System in North Carolina when they were conveyed in 1956 by the then-North Carolina State Highway Commission. I-77 was added in 1957, increasing the state's mileage to 776 miles (1,249 km).
On 4 August 1959, the commission selected the routing of I-77 to run between Interstate 85 in Charlotte and a point on the Virginia border in Elkin. That would change in late 1960, when the commission voted to route the highway just west of Mount Airy, saying the route would serve the most people.
With construction beginning in the 1960s, I-77 would gain additional mileage in October 1964 when a two-mile (3 km) extension was granted by the U.S. Bureau of Public Roads. Instead of ending at I-85, I-77 now ended at Independence Boulevard (U.S. 74) in downtown Charlotte. Another extension was granted in the late 1960s that extended I-77 from Independence Boulevard to the South Carolina border. The latest extension also included a relocation of U.S. 21 from the city's surface streets to the new interstate.
I-77 opened to traffic in the following segments:
- 1965: Yadkin and Surry counties.
- 1966: A 23-mile (37 km) stretch in Iredell County.
- 1967: Stretches in Mecklenburg, Yadkin and Iredell counties.
- 1968: A stretch of highway in the Davidson and Cornelius areas in Mecklenburg and Iredell counties.
By 1972, I-77 was open from Exit 28 (NC 73) to Exit 73 north of Elkin. The last two sections of the highway to open to traffic was the stretch from Cornelius to Charlotte in 1975 and from Exit 73 to the Virginia state line in 1977.
In April 2001, I-74 was overlapped with I-77 from the Virginia state line to exit 101.
On 17 December 2004, I-77 was widened to six-lanes with HOV lanes, between I-85 to the proposed location of I-485 (later opened 8 December 2008).
Read more about this topic: Interstate 77 In North Carolina
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