Virginia State Route 110

State Route 110
State Route 110
Richmond Highway
	SR 110 highlighted in red
Route information
	Maintained by VDOT
Length	2.41 mi (3.88 km)
Existed	1964–present
Major junctions
South end	I-395 / US 1 in Crystal City
	SR 27 in Arlington Cemetery
North end	I-66 in Rosslyn
Location
Country	United States
State	Virginia
Counties	Arlington
Highway system
	Virginia Routes; Interstate; US; Primary; Secondary; Byways; History; HOT lanes;

Virginia State Route 110 (SR 110) is a primary state highway in Arlington, Virginia. Known as the Richmond Highway (formerly Jefferson Davis Highway), the state highway runs 2.41 miles (3.88 km) from U.S. Route 1 (US 1) and Interstate 395 (I-395) in Crystal City north to I-66 in the Rosslyn neighborhood. SR 110 is a four- to six-lane freeway (with the exception of one at-grade intersection and a few driveways) that parallels the Potomac River, providing a connection between several of Arlington's urban villages and major landmarks, including the Pentagon, which is the headquarters of the United States Department of Defense, and the grounds of Arlington National Cemetery. The highway also provides access to SR 27, an east–west freeway between the Pentagon and the cemetery, and the George Washington Parkway that parallels the Potomac River. SR 110 is a part of the National Highway System for its entire length.^[2]

SR 110 is a part of the Pentagon road network, a network of freeways and surface roads built concurrent with the construction of the Pentagon in the early 1940s. The state highway received its numerical designation in 1964 when maintenance responsibility was transferred to the Virginia Department of Transportation. SR 110's most significant changes in routing were relocation of the highway in Rosslyn to tie into I-66 in the 1980s and relocation of the freeway at the Pentagon to provide a larger security buffer for the building after the September 11 attacks. The highway is sometimes closed for large events held at or around the Pentagon, including the Marine Corps Marathon.^[3] In 2019, SR 110 was renamed to Richmond Highway.

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