U.S. Route 66 Bypass (St. Louis, Missouri)
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Bypass US 66 around the St. Louis area was the redesignated U.S. Highway 66, commissioned as a bypass in 1958. Until 1969, when Business US 66 was returned to the US 66 designation, no non-bannered US 66 existed in the St. Louis area. In 1938, US 66 was moved on a bypass around the city of St. Louis with the original alignment becoming the business route. This alignment became the business route. In 1969, the business route, now joined with the East St. Louis business route became non-bannered US 66, and Bypass 66 became a newly built Interstate 270.
Bypass US 66 is now (roughly) Interstate 270 and Lindbergh Boulevard (U.S. Highway 61/U.S. Highway 67).