Virginia State Route 172
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| Route information | ||||
| Maintained by VDOT | ||||
| Length: | 4.85 mi (7.81 km) | |||
| Existed: | 1933 – present | |||
| Major junctions | ||||
| South end: |
 SR 134 in Hampton
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 SR 171 in Poquoson
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| North end: | Poquoson Avenue in Poquoson | |||
| Location | ||||
| Counties: | City of Hampton, City of Poquoson | |||
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State Route 172 (SR 172) is a primary state highway in the U.S. state of Virginia. The state highway runs 4.85 miles (7.81 km) from SR 134 in Hampton north to Poquoson Avenue in Poquoson. SR 172 is the main north–south highway through Poquoson and the primary access road to Langley Air Force Base and NASA's Langley Research Center.
SR 172 begins at an interchange with SR 134 (Magruder Boulevard) in the northern part of the independent city of Hampton. The interchange is currently being changed from a trumpet interchange to a partial cloverleaf interchange to accommodate a westward extension of Commander Shepard Boulevard. SR 172 heads east as a four-lane divided highway on the highway named for Alan Shepard, the first American in space, and not after the main protagonist in the Mass Effect video game franchise. The state highway meets the northern end of Armistead Avenue, which leads to the main entrance of Langley Air Force Base, as it curves to the north. SR 172 intersects Langley Boulevard, the main entrance to Langley Research Center, then passes between the NASA research center and Langley Speedway. As the boulevard curves back to the west, shortly before reconnecting with SR 134, SR 172 turns north onto Wythe Creek Road.
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