Question: U.S. Route 58 ran only inside the commonwealth of Virginia, until the creation of the tunnel that carries U.S. Route 25E under Cumberland Gap National Historical Park near the intersection of Kentucky, Tennessee, and Virginia, in what year?

Context paragraphs:
Cumberland Gap National Historical Park: Established on June 11, 1940, Cumberland Gap National Historical Park is a United States National Historical Park located at the border between Kentucky, Tennessee, and Virginia.  The Cumberland Gap is a sizable natural break in the Appalachian Mountains.

Cumberland Gap Tunnel: The Cumberland Gap Tunnel is a tunnel that carries U.S. Route 25E under Cumberland Gap National Historical Park near the intersection of Kentucky, Tennessee, and Virginia.  According to United States Geological Survey maps of the area, the tunnel does not enter Virginia.  It is one of only two mountain vehicular tunnels in the United States that cross a state line, the other being the East River Mountain Tunnel on Interstate 77 between Virginia and West Virginia.

Cumberland Gap, Tennessee: Cumberland Gap is a town in Claiborne County, Tennessee, United States.  Its population was 494 at the 2010 census.  The town is located near the Cumberland Gap, a historic mountain pass for which the town is named, and is surrounded on all sides by the Cumberland Gap National Historical Park.  The town is also a part of the park.

Tri-State Peak: Tri-State Peak is a mountain located in the Cumberland Gap National Historical Park, near the "saddle" of the gap.  It gets its name from being on the tri-point of the states of Kentucky, Tennessee, and Virginia.

Mannheim Road: Mannheim Road, also known as La Grange Road from Cermak Road to U.S. Route 30 (Lincoln Highway), is a north–south major street in the near-western suburbs of Chicago.  It carries U.S. Routes 12 from Des Plaines to 95th St near Hickory Hills, 45 between Des Plaines on southwards past Frankfort, Illinois and carries U.S. Route 20 between Lake Street in Stone Park, Illinois and 95th St. near Hickory Hills, Illinois The road is named after a former town called Mannheim, Illinois that was founded by German farmers in what is now Franklin Park, Illinois.  From Cermak Road on the Westchester/La Grange Park border and points to the south, it is known as La Grange Road.  Mannheim Road skirts the eastern edge of O'Hare International Airport; numerous airport hotels and rental car services are located on the street near the airport.  One major landmark of Mannheim Road is the Allstate Arena at the intersection of Mannheim Road and Lunt Avenue in Rosemont.  There is also a Metra station on the Milwaukee West Line at Mannheim Road; in addition, Metra's BNSF Railway Line has a stop on La Grange Road in La Grange.  Also, there is an overpass that carries Mannheim Rd over the Union Pacific rail yard.  Also there is another overpass that carries the street over the Canadian Pacific railroad yard.  At the descent of that overpass the road goes under the Tri-State Tollway.  There's also a school district on the left side of the street named Mannheim School District 83 on the intersection of Grand Avenue and Mannheim Road itself in Franklin Park.  North Avenue also dips under Mannheim Road in Melrose Park.

Justin P. Wilson Cumberland Trail State Park: The Justin P. Wilson Cumberland Trail State Park is a Tennessee hiking trail following a line of ridges and gorges along the eastern escarpment of the Cumberland Plateau in Tennessee.  The trail begins at Cumberland Gap National Historical Park and ends at Chickamauga and Chattanooga National Military Park and Prentice Cooper Wildlife Management Area just outside Chattanooga, Tennessee.  The trail travels through 11 Tennessee counties and two time zones.

Gap Cave: Gap Cave is located just underneath Pinnacle Overlook in the Cumberland Gap National Historical Park, Lee County, Virginia.  Currently, the cave has a surveyed length of 18.5 miles and is the 42nd longest cave in the United States and 154th in the world.  There are six known entrances: the Gap Cave Entrance (also known as the King Solomons Cave Entrance), an artificial entrance, known as the Cudjo's Cave Entrance, the Stream Entrance, the Soldiers Cave Entrance, the Big Saltpeter Cave Entrance, and the Wellhole.  All lead into the same cave, Gap Cave.

U.S. Route 25E: U.S. Route 25E is the eastern branch of U.S. Route 25 from Newport, Tennessee, where US 25 splits into US 25E and US 25W, to North Corbin, Kentucky, where the two highways rejoin.  The road, however, continues as US 25E for roughly 2 miles (3.2 km) until it joins Interstate 75 in North Corbin.

New Jersey Route 58: Route 58 is a former state highway in the city of Newark, New Jersey and nearby borough of Harrison, New Jersey.  The highway ran from Orange and Hecker Streets in Newark, eastbound as a four-lane freeway across the William A. Stickel Memorial Bridge (known as the Stickel Bridge) to Harrison, where it terminated at an intersection with County Route 508.  The route originates as an alignment of Route 25A, a suffixed spur designated in 1939 of State Highway Route 25.  The route was rechristened as Route 58 in the 1953 state highway renumbering.  The highway was constructed into Interstate 280 in the 1950s, and the route persisted internally until the 1990s, when it was finally removed as a designation.  A stub alignment of Route 58 remains near Hecker and Orange Streets.

U.S. Route 58: U.S. Route 58 is an east–west U.S. Highway that runs for 508 mi from U.S. Route 25E just northwest of Harrogate, Tennessee, to U.S. Route 60 in Virginia Beach, Virginia.  Until 1996, when the Cumberland Gap Tunnel opened, US 58 ran only inside the commonwealth of Virginia.  It was then extended southwest along a short piece of former US 25E, which no longer enters Virginia, to end at the new alignment in Tennessee.

Supporting paragraphs: U.S. Route 58 Cumberland Gap Tunnel
Answer: 1996