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.
[R.O. 2001 § 320.030; CC 1990 § 10-34; Code 1977 § 16.145(2) – (4); Ord. No. 90-12, § 4, 10-2-1990; Ord. No. 06-18 §§ 1 – 2, 11-7-2006]
A. 
No person other than the operator of an emergency vehicle on an emergency run shall operate a vehicle in the City at a rate of speed in excess of twenty-five (25) miles per hour except on those streets or portions thereof, as designated by the Board of Aldermen from time to time, which have been posted as streets or portions of streets on which a higher speed is permitted, and which are listed in Schedule I, Speed Limits.
B. 
Fifteen (15) miles per hour speed zones may only be placed on any County, State or Federal marked or maintained highways where approval has been granted by the proper officials of the County Highway Department or State Highway Department.
C. 
Except when due to a condition of the vehicle which was not reasonably foreseeable when entering upon the street, alley or highway, and while removing such vehicle off the street or highway in the shortest reasonable time and distance, or when reasonably necessary under the conditions existing at the time and place, no person shall drive a vehicle at a rate of speed so slow as to impede, block or endanger the normal, usual and reasonable movement of other traffic in the street, alley or highway.
D. 
The driver of every vehicle shall, consistent with the requirements of this Section, drive at an appropriate reduced speed when approaching and crossing an intersection, when approaching and going around a curve or right angle turn, when approaching a hillcrest, when traveling upon any narrow or winding roadway and when special hazards exist with respect to pedestrians or other traffic or by reason of weather or highway and street conditions; infractions thereof shall come under the heading of dangerous and reckless driving.
E. 
"Construction" Or "Work Zones."
1. 
As used in this Section, the term "construction zone" or "work zone" means any area upon or around any roadway, which is visibly marked by the State of Missouri, St. Louis County, City of Clarkson Valley or a contractor performing work for one (1) of these entities as an area where construction, maintenance, or other work is temporarily occurring. The term "work zone" or "construction zone" also includes the lanes of a roadway leading up to the area upon which an activity described in this Subsection is being performed, beginning at the point where appropriate signs directing motor vehicles to merge from one (1) lane into another lane are posted.
2. 
Upon a conviction or a plea of guilty by any person for a moving violation as defined in Section 302.010, RSMo., or any offense listed in Section 302.302, RSMo., the Municipal Court shall assess a fine of thirty-five dollars ($35.00) in addition to any other fine authorized to be imposed by law, if the offense occurred within a construction zone or a work zone.
3. 
Upon a conviction or plea of guilty by any person for a speeding violation pursuant to this Section, or a passing violation pursuant to Subsection (E)(6) of this Section, the court shall assess a fine of two hundred fifty dollars ($250.00) in addition to any other fine authorized by law, if the offense occurred within a construction zone or a work zone and at the time the speeding or passing violation occurred there was any person in such zone who was there to perform duties related to the reason for which the area was designated a construction zone or work zone. However, no person assessed an additional fine pursuant to this Subsection shall also be assessed an additional fine pursuant to Subsection (E)(2) of this Section, and no person shall be assessed an additional fine pursuant to this Subsection if no signs have been posted pursuant to Subsection (E)(4) of this Section.
4. 
The penalty authorized by Subsection (E)(3) of this Section shall only be assessed by the court if the State of Missouri, St. Louis County, City of Clarkson Valley or contractor performing work for the Department of Transportation has erected signs upon or around a construction or work zone which are clearly visible from the roadway and which state substantially the following message: "Warning: $250.00 fine for speeding or passing in this work zone."
5. 
During any day in which no person is present in a construction zone or work zone established pursuant to Subsection (E)(3) of this Section to perform duties related to the purpose of the zone, the sign warning of additional penalties shall not be visible to motorists. During any period of two (2) hours or more in which no person is present in such zone on a day in which persons have been or will be present to perform duties related to the reason for which the area was designated as a construction zone or work zone, the sign warning of additional penalties shall not be visible to motorists. The State of Missouri, St. Louis County, City of Clarkson Valley or contractor performing work for the State of Missouri, St. Louis County, and/or City of Clarkson Valley shall be responsible for compliance with provisions of this Subsection. Nothing in this Subsection shall prohibit warning or traffic control signs necessary for public safety in the construction or work zone being visible to motorists at all times.
6. 
The driver of a motor vehicle may not overtake or pass another motor vehicle within a work zone or construction zone. This Subsection applies to a construction zone or work zone located upon a roadway divided into two (2) or more marked lanes for traffic moving in the same direction and for which motor vehicles are instructed to merge from one (1) lane into another lane by an appropriate sign erected by the State of Missouri, St. Louis County, City of Clarkson Valley or a contractor performing work for the Department of Transportation. This Section shall not be construed to enhance the assessment of court costs or the assessment of points pursuant to Section 302.302, RSMo.
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.
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.[1]
[1]
Editor's Note: Said schedule is included at the end of Title III.