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(a) The provisions of Section 11-601 of the Illinois Vehicle Code shall be applicable on all streets within and under the jurisdiction of the city. The absolute statutory urban speed limit shall be 30 miles per hour in streets and 15 miles per hour in alleys. The absolute statutory nonurban speed limit shall be 55 miles per hour. In addition to any fines or other penalties provided by statute or by this Code, any person found operating a vehicle in excess of the limits stated herein shall be subject to a fine of not less than $200.00 nor more than $300.00 for the first offense, and not less than $300.00 nor more than $500.00 for the second offense, and not less than $500.00 nor more than $1,000.00 for the third and each subsequent offense within a given three-year period. A person violating this section shall also be subject to the community service requirements imposed by Section 1-4-120 of the Code. A person whose violation of this section results in a fatality may be subject to the imposition of felony charges by the state's attorney.
(b) Where the commissioner of transportation has determined on the basis of an engineering or traffic investigation that the statutory speed limits are greater or less than is reasonable or safe with respect to the conditions found to exist along any part of any roadway, the urban speed limits may be increased, but not in excess of 55 miles per hour, and may be diminished, but not to less than 20 miles per hour, and the nonurban speed limit may be diminished, but not to less than 35 miles per hour, when such determination is approved by an ordinance of the city council. Such ordinance altering speed limits shall be enforceable when appropriate signs giving notice of the limit are erected at the proper places along the affected roadway or highway or part thereof.
(Added Coun. J. 7-12-90, p. 18634; Amend Coun. J. 12-11-91, p. 10832; Amend Coun. J. 10-28-97, p. 54842; Amend Coun. J. 11-19-97, p. 57859; Amend Coun. J. 11-6-02, p. 96501, § 3; Amend Coun. J. 12-4-02, p. 100729, § 3; Amend Coun. J. 4-26-06, p. 75398, § 1)