The State traffic laws regulating the speed of vehicles shall be applicable upon all streets within the City, except that the City may by ordinance declare and determine upon the basis of engineering and traffic investigation that certain speed regulations shall be applicable upon specified streets or in certain areas, in which event it shall be unlawful for any person to drive a vehicle at a speed in excess of any speed so declared when signs are in place giving notice thereof.
The City Traffic Engineer is authorized to regulate the timing of traffic signals so as to permit the movement of traffic in an orderly and safe manner at speeds slightly at variance from the speeds otherwise applicable within the district or at intersections and shall erect appropriate signs giving notice thereof.
Except where otherwise provided by signs erected pursuant to duly passed and approved ordinances, no person shall operate a vehicle on any street in the City in excess of twenty (20) miles per hour.
No person shall drive a motor vehicle at such a slow speed as to impede or block the normal and reasonable movement of traffic, except when reduced speed is necessary for safe operation or in compliance with law. Peace Officers may enforce the provisions of this Section by directions to drivers and in the event of apparent willful disobedience to this provision and refusal to comply with direction of an officer in accordance herewith, the continued slow operation by a driver is an ordinance violation.
[R.O. 2006 §320.060]
Except as elsewhere provided, on any divided highway designated as part of the Federal Interstate System, no vehicle shall be operated at a speed of less than forty (40) miles per hour, except when a slower speed is required for safe operation of the vehicle because of weather or other special conditions.
Agricultural implements, self-propelled hay-hauling equipment, implements of husbandry and vehicles transporting such vehicles or equipment may be operated occasionally on interstate highways for short distances at a speed of less than forty (40) miles per hour if such vehicle or equipment is operated under a special permit issued by the Chief Engineer of the State Department of Highways and transportation pursuant to Section 304.200, RSMo., and the regulations established pursuant thereto.
No person shall operate a motor vehicle upon those portions of the roadways which are set forth and described in Schedule I at a rate of speed in excess of that speed limit set for such portions of the roadways by said Schedule.