 Non-special 66 continued west down, roughly, Interstate 270 to Lindbergh Boulevard, then south to rejoin the original alignment down Watson Road.The business route turned south on Riverview, Broadway, Florissant Ave, Tucker Boulevard (then 12th Street), then southwest on Gravois Road, then west-southwest on Chippewa Street (which becomes Watson Road in the suburbs).The road was originally designated "City" 66, but in 1960 it became "Business" 66, a trend seen on other city routes across the country.