Pentagon road network

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Mixing Bowl
1945 map of the Pentagon road network with the Mixing Bowl in the lower left corner
Location
The Pentagon, Arlington County, Virginia
Roads at junction	I-395 (Shirley Highway) SR 27 (Washington Boulevard) SR 110 (Richmond Highway) SR 244 (Columbia Pike)
Construction
Type	Interchange
Opened	1942 (1942)
Maintained by	Virginia Department of Transportation

The Pentagon road network is a system of highways, mostly freeways, built by the United States federal government in the early 1940s to serve the Pentagon in northern Virginia. The roads, transferred to the Commonwealth of Virginia in 1964, are now largely state highways. The main part of the network is the Mixing Bowl at Interstate 395 (Shirley Highway) and Route 27 (Washington Boulevard), named because it had major weaving issues with traffic "mixing" between the two roads before it was rebuilt in the early 1970s.

The "Mixing Bowl" nickname is now more commonly used to refer to the Springfield Interchange, where I-395, I-495, and I-95 converge in nearby Springfield.