227.312. Rosa Parks Highway, portion of Interstate Highway 55 in St. Louis County designated as. — The portion of Interstate Highway 55, one mile south of Lindbergh Boulevard to Butler Hill Road, contained within a county of the first classification with a charter form of government having a population over nine hundred thousand shall be designated the "Rosa Parks Highway".
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(L. 2000 H.B. 1742 § 226.781)