U.S. Route 40 in California

U.S. Route 40
National Road Victory Highway
Route information
Length:	2,285.74 mi (3,678.54 km)
Existed:	1926 – present
Major junctions
West end:	I‑80 / US 189 in Silver Summit, UT
	I‑25 in Denver, CO I‑35 in Kansas City, MO I‑55 / I‑64 / I‑70 in East St. Louis, IL I‑57 in Effingham, IL I‑65 / I‑69 / I‑70 / I‑74 in Indianapolis, IN I‑75 near Dayton, OH I‑77 in Cambridge, OH I‑79 in Washington, PA I‑81 in Hagerstown, MD I‑95 in Baltimore, MD
East end:	US 322 in Atlantic City, NJ
Location
States:	Utah, Colorado, Kansas, Missouri, Illinois, Indiana, Ohio, West Virginia, Pennsylvania, Maryland, Delaware, New Jersey
Highway system
United States Numbered Highway System List Special Divided Replaced ← K-39 KS K-41 → ← Route 39 MO Route 41 → ← I-39 IL IL 40 → ← SR 39 IN US 41 → ← SR 39 OH SR 40 →

U.S. Route 40 (US 40) is an east–west United States Highway. As with most routes whose numbers end in a zero, US 40 once traversed the entire United States. It is one of the original 1926 U.S. Highways, and its first termini were San Francisco, California, and Atlantic City, New Jersey. In the western United States, US 40 was functionally replaced by Interstate 80 (I-80), resulting in the route being truncated multiple times. US 40 currently ends at a junction with I-80 in Silver Summit, Utah, just outside Park City.

Starting at its western terminus in Utah, US 40 crosses a total of 12 states, including Colorado, Kansas, Missouri, Illinois, Indiana, Ohio, West Virginia, Pennsylvania, Maryland, Delaware, and New Jersey. Three former and four current state capitals lie along the route. For much of its route, US 40 runs parallel to or concurrently with several major Interstate Highways: Interstate 70 from Colorado to Washington, Pennsylvania; and again from Hancock, Maryland to Baltimore, Maryland; Interstate 64 in parts of Missouri and Illinois; Interstate 68 along the Maryland Panhandle; and Interstate 95 from Baltimore to New Castle, Delaware.

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