List of auxiliary Interstate Highways in the context of "Brooklyn–Queens Expressway"

Interstate 278 (I-278) is an auxiliary Interstate Highway in New Jersey and New York in the United States. The road runs 35.62 miles (57.32 km) from US Route 1/9 (US 1/9) in Linden, New Jersey, northeast to the Bruckner Interchange in the New York City borough of the Bronx. The majority of I-278 is in New York City, where it serves as a partial beltway and passes through all five of the city's boroughs. I-278 follows several freeways, including the Union Freeway in Union County, New Jersey; the Staten Island Expressway (SIE) across Staten Island; the Gowanus Expressway in southern Brooklyn; the Brooklyn–Queens Expressway (BQE) across Northern Brooklyn and Queens; a small part of the Grand Central Parkway in Queens; and a part of the Bruckner Expressway in the Bronx. I-278 also crosses multiple bridges, including the Goethals, Verrazzano–Narrows, Kosciuszko, and Robert F. Kennedy bridges.

I-278 was opened in pieces from the 1930s through the 1960s. Some of its completed segments predated the Interstate Highway System and are thus not up to standards, and portions of I-278 have been upgraded over the years. In New York, the various parts of I-278 were planned by Robert Moses, an urban planner in New York City. The segments proposed tore through many New York City neighborhoods, causing controversy. Despite its number, I-278 does not connect to I-78. There were once plans to extend I-278 west to I-78 east of the Route 24 interchange in Springfield, New Jersey. This was canceled because of opposition from the communities along the route. The segment that does exist in New Jersey was opened in 1969. There were also plans to extend I-78 east across Manhattan and into Brooklyn via the Williamsburg Bridge; this would have been a second interchange between I-278 and its parent highway, but these plans were also thwarted. I-78 was also planned to extend east beyond I-278 to John F. Kennedy International Airport, and then curve northward on the Clearview Expressway, ending at the Bruckner Interchange in the Bronx. If these plans were fully completed, I-78 and I-278 would have met at three interchanges.

Interstate 75 (I-75) is a part of the Interstate Highway System that runs 1,786.47 miles (2,875.04 km) from Miami Lakes, Florida to the Canada–United States border at Sault Ste. Marie, Michigan. In the U.S. state of Kentucky, I-75 runs through the eastern half of the state, from the Tennessee state line near the city of Williamsburg to the Ohio state line near Covington. The Interstate serves the state's second-most populous city, Lexington. Outside of it, the route is mostly rural or suburban in nature, mainly providing access to other cities via state and U.S. Highways. The major landscapes traversed by I-75 include the rolling hills and mountains of the Cumberland Plateau, the flat Bluegrass region, the urban core of Lexington, and the highly urbanized suburbs of Northern Kentucky; it also very briefly crosses through the Eastern Kentucky Coalfield at its southernmost stretch and passes near the Daniel Boone National Forest in London.

Of the six states which I-75 passes through, the segment in Kentucky is the second-shortest, at 191.78 miles (308.64 km) long. I-75 parallels the older U.S. Route 25 (US 25) and U.S. Route 25E (US 25E) corridors for its entire length in Kentucky. The Interstate was part of the Federal-Aid Highway Act of 1956, with a section of it from the Ohio River at Covington to an unknown location north of Richmond being the first segment of the Interstate Highway, opened in 1957. Unfinished portions of the highway were eventually completed in increments, with the very last section being opened in 1969. Due to the rapid growth and high traffic volume in the Lexington metropolitan area and Northern Kentucky, many widening projects and renovations have been undertaken on I-75 since then. The Interstate has one auxiliary route, I-275, a beltway encircling Cincinnati.

The Capital Beltway, designated as Interstate 495 (I-495) for its entire length, is an auxiliary Interstate Highway in the Washington metropolitan area. The 64-mile (103 km) beltway encircles Washington, D.C., the capital of the United States, and its inner suburbs in adjacent Maryland and Virginia. It also passes through the capital, near the western end of the Woodrow Wilson Bridge over the Potomac River; Prince George's and Montgomery counties in Maryland and Fairfax County; and the independent city of Alexandria in Virginia.

The route is the basis of the phrase "inside the Beltway", used when referring to issues dealing with U.S. federal government and politics. Its southern and eastern half runs concurrently with I-95. It was constructed in 1964. The Cabin John Parkway, a short connector between I-495 and the Clara Barton Parkway near the Potomac River along the Maryland–Virginia border, is considered an Interstate spur (I-495X) by the Maryland State Highway Administration (MDSHA).