Nellis Air Force Base ("Nellis" colloq.
) is a United States Air Force installation in southern Nevada with military schools and more squadrons than any other USAF base.
 Nellis hosts air combat exercises such as Exercise Red Flag and close air support exercises such as Green Flag-West flown in "Military Operations Area (MOA) airspace".
 associated with the nearby Nevada Test and Training Range (NTTR).
 The base also has the Combined Air and Space Operations Center-Nellis.
Patrick Air Force Base (IATA: COF, ICAO: KCOF, FAA LID: COF) is a United States Air Force installation located between Satellite Beach and Cocoa Beach, in Brevard County, Florida, in the United States.
 It was named in honor of Major General Mason Patrick, USAAC.
 An Air Force Space Command (AFSPC) base, it is home to the 45th Space Wing (45 SW).
 In addition to its "host wing" responsibilities at Patrick AFB, the 45 SW controls and operates Cape Canaveral Air Force Station (CCAFS) and the Eastern Range.
 It was originally opened and operated from 1940 to 1947 as Naval Air Station Banana River, a U.S. Navy airfield.
 It was then deactivated as a naval installation in 1947 and placed in caretaker status until it was transferred to the Air Force in late 1948.
Mission Raceway Park, also known as MRP, is an auto racing facility located in Mission, British Columbia, Canada.
 The facility features a ¼ mile NHRA-sanctioned dragstrip, a 2 km 9-turn road course, and a 3 km motocross track.
 It is owned and operated by the B.C. Custom Car Association, and the BCCCA operates the drag strip directly.
 The road course and motocross tracks are operated independently by the Sports Car Club of British Columbia (SCCBC) and the Lower Mainland Motocross Club (LMMC) respectively.
Laredo Air Force Base is an inactive United States Air Force installation near Laredo, Texas.
 First activated in 1942 as Laredo Army Airfield, the facility instructed recruits in aerial gunnery during World War II, then as a United States Air Force base in the 1950s and 1960s, performed Undergraduate Pilot Training (UPT) as part of Air Training Command.
 The base was inactivated in 1973 as part of the drawdown after the Vietnam War.
AUSCAR (Australian Stock Car Auto Racing) was an auto racing sanctioning body owned by Bob Jane, which ran American-style Superspeedway racing in Australia.
 The initial AUSCAR venue was the 1.801 km (1.119 mi), high-banked (24°) Calder Park Thunderdome Superspeedway in Melbourne, but over time the series expanded to include the Jane owned 1/2 mile (805 metre) Speedway Super Bowl at the eastern end of Adelaide International Raceway which first saw AUSCAR racing in 1990 (the Super Bowl was only other paved oval circuit in Australia with only 7° banking in the corners making it essentially a traditional flat track), the Surfers Paradise Street Circuit, and eventually several Australian road racing circuits including Calder Park's road course and the Oran Park Raceway in Sydney where racing was held under lights on the short version of the circuit.
 In the early 1990s, Jane and television station Channel 7 announced plans to turn the old Granville Showground trotting track which circled the Parramatta Speedway in Sydney into a paved, banked 1/2 mile track, but unfortunately this did not happen.
The Stardust International Raceway was an auto racing track in Spring Valley, in the Las Vegas Valley.
 It featured a flat, 3 mi , 13-turn road course, and a quarter-mile drag strip.
 It was built in 1965 by the Stardust Hotel and Casino to attract high rollers to the hotel.
 In 1966 it began hosting the season finale of the Can-Am championship.
 In 1968 the USAC Championship Car series held a race at Stardust.
 The hotel was sold in 1969, and the new owners largely abandoned the track.
 Larry Horton, the track's manager, leased the land and ran drag racing events until 1970.
 Real estate developers Pardee Homes bought the land and built the Spring Valley community on it.
 Meanwhile, a replacement track, the Las Vegas Speedrome, was announced afterwards and opened in 1972, with a 1.8 mile drag strip and road course across from Nellis Air Force Base, which expanded into today's Las Vegas Motor Speedway.
Central New York Raceway Park is a motorsports complex currently under construction in Central Square, New York, United States.
 The complex will feature a 2.2 mile (3.54 km) road course and a 5/8 mile synthetic dirt oval for both auto & harness racing.
 The 2.2 mile road course was designed by Peter Argetsinger and will be the only natural terrain road course in North America featuring a permanent lighting system.
 The 5/8 mile synthetic dirt oval will also feature a smaller oval for go-karts and flat track speedway bike racing.
 While the road course & oval tracks have been under development, the circuit also hosted the SCCA CNY Region Rallycross.
Oklahoma City Air Force Station (ADC ID: P-52, NORAD-ID: Z-52) is a closed Cold War United States Air Force air defense and communications-electronics headquarters and radar station.
 It was located 10 mi east-southeast of Oklahoma City, Oklahoma, just to the southeast of Tinker Air Force Base.
 It ceased to be a separate Air Force installation on 1 October 1983, when it merged with Tinker.
Hurlburt Field (ICAO: KHRT, FAA LID: HRT) is a United States Air Force installation located in Okaloosa County, Florida, immediately west of the Town of Mary Esther.
 It is part of the greater Eglin Air Force Base reservation, and is home to Headquarters Air Force Special Operations Command (AFSOC), the 1st Special Operations Wing (1 SOW), the USAF Special Operations School (USAFSOS) and the Air Combat Command's (ACC) 505th Command and Control Wing.
 It was named for First Lieutenant Donald Wilson Hurlburt, who died in a crash at Eglin.
 The installation is nearly 6700 acre , and employs nearly 8,000 military personnel.
Texas World Speedway, was built in 1969 and is one of only seven superspeedways of two miles (3 km) or greater in the United States used for racing, the others being Indianapolis, Daytona, Pocono, Talladega, Auto Club, and Michigan (there are several tracks of similar size used for vehicle testing).
 TWS is located on approximately 600 acres (2.4 km²) on State Highway 6 in College Station, Texas.
 There is a 2 mi oval, and several road course configurations.
 The full oval configuration is closely related to that of Michigan and is often considered the latter's sister track, featuring steeper banking, at 22 degrees in the turns, 12 degrees at the start/finish line, and only 2 degrees along the backstretch, compared to Michigan's respective 18, 12, and 5 degrees.
 The last major race occurred at the track in 1981.
 The track wasl used by amateur racing clubs such as the SCCA, NASA, Porsche Club of America, Corinthian Vintage Auto Racing, CMRA, driving schools and car clubs, as well as hosting music concerts and the like.

Question: How long is the road course in the auto racing track that is across from a United States Air Force installation in Nevada?
Answer: 3 mi