Those streets and parts of streets described by ordinances of the City are declared to be through streets for the purposes of Sections 335.010 to 335.080.
Whenever any ordinance of the City designates and describes a through street it shall be the duty of the City Traffic Engineer to place and maintain a stop sign, or on the basis of an engineering and traffic investigation at any intersection a yield sign, on each and every street intersecting such through street unless traffic at any such intersection is controlled at all times by traffic control signals; provided, however, that at the intersection of two (2) such through streets or at the intersection of a through street and a heavy traffic street not so designated, stop signs shall be erected at the approaches of either of said streets as may be determined by the City Traffic Engineer upon the basis of an engineering and traffic study.
The City Traffic Engineer is hereby authorized to determine and designate intersections where particular hazard exists upon other than through streets and to determine whether vehicles shall stop at one (1) or more entrances to any such intersection in which event he/she shall cause to be erected a stop sign at every such place where a stop is required, or whether vehicles shall yield the right-of-way to vehicles on a different street at such intersection as prescribed in Subsection (A) of Section 335.040 in which event he/she shall cause to be erected a yield sign at every place where obedience thereto is required.
A. 
The driver of a vehicle approaching a yield sign if required for safety to stop shall stop before entering the crosswalk on the near side of the intersection or, in the event there is no crosswalk, at a clearly marked stop line, but if none, then at the point nearest the intersecting roadway where the driver has a view of approaching traffic on the intersecting roadway.
B. 
Except when directed to proceed by a Police Officer or traffic control signal, every driver of a vehicle approaching a stop intersection indicated by a stop sign shall stop before entering the crosswalk on the near side of the intersection or, in the event there is no crosswalk, shall stop at a clearly marked stop line, but if none, then at the point nearest the intersecting roadway where the driver has a view of approaching traffic on the intersecting roadway before entering the intersection.
Except when directed to proceed by a Police Officer or traffic control signal, every driver of a vehicle approaching a stop intersection indicated by a stop sign shall stop as required by Subsection (B) of Section 335.040, and after having stopped shall yield the right-of-way to any vehicle which has entered the intersection from another highway or which is approaching so closely on said highway as to constitute an immediate hazard during the time when such driver is moving across or within the intersection.
The driver of a vehicle approaching a yield sign shall in obedience to such sign slow down to a speed reasonable for the existing conditions and shall yield the right-of-way to any vehicle in the intersection or approaching on another highway so closely as to constitute an immediate hazard during the time such driver is moving across or within the intersection; provided, however, that if such a driver is involved in a collision with a vehicle in the intersection, after driving past a yield sign without stopping, such collision shall be deemed prima facie evidence of his/her failure to yield right-of-way.
The driver of a vehicle within a business or residential district emerging from an alley, driveway or building shall stop such vehicle immediately prior to driving onto a sidewalk or onto the sidewalk area extending across any alleyway or driveway, and shall yield the right-of-way to any pedestrian as may be necessary to avoid collision, and upon entering the roadway shall yield the right-of-way to all vehicles approaching on said roadway.
No driver shall enter an intersection or a marked crosswalk unless there is sufficient space on the other side of the intersection or crosswalk to accommodate the vehicle he/she is operating without obstructing the passage of other vehicles or pedestrians, notwithstanding any traffic control signal indication to proceed.
A. 
The driver of a vehicle upon a highway upon meeting or overtaking from either direction any school bus which has stopped on the highway for the purpose of receiving or discharging any school children and whose driver has in the manner prescribed by law given the signal to stop shall stop the vehicle before reaching such school bus and shall not proceed until such school bus resumes motion or until signaled by its driver to proceed.
B. 
Every bus used for the transportation of school children shall bear upon the front and rear thereon a plainly visible sign containing the words "School Bus" in letters not less than eight (8) inches in height. Each bus shall have lettered on the rear in plain and distinct type the following: "State Law: Stop While Bus is Loading and Unloading". Each school bus subject to the provisions of Sections 304.050 to 304.070, RSMo., shall be equipped with a mechanical and electrical signaling device approved by the State Board of Education which will display a signal plainly visible from the front and rear and indicating intention to stop.
C. 
Every school bus operated to transport students in the public school system which has a gross vehicle weight rating of more than ten thousand (10,000) pounds, which has the engine mounted entirely in front of the windshield and the entrance door behind the front wheels, and which is used for the transportation of school children shall be equipped with a crossing control arm. The crossing control arm, when activated, shall extend a minimum of five (5) feet six (6) inches from the face of the front bumper. The crossing control arm shall be attached on the right side of the front bumper and shall be activated by the same controls which activate the mechanical and electrical signaling devices described in Subsection (B) of this Section. This Subsection may be cited as "Jessica's Law" in commemoration of Jessica Leicht and all other Missouri school children who have been injured or killed during the operation of a school bus.
D. 
Except as otherwise provided in this Section, the driver of a school bus in the process of loading or unloading students upon a street or highway shall activate the mechanical and electrical signaling devices, in the manner prescribed by the State Board of Education, to communicate to drivers of other vehicles that students are loading or unloading. A public school district has the authority pursuant to Section 304.050, RSMo., to adopt a policy which provides that the driver of a school bus in the process of loading or unloading students upon a divided highway of four (4) or more lanes may pull off of the main roadway and load or unload students without activating the mechanical and electrical signaling devices in a manner which gives the signal for other drivers to stop and may use the amber signaling devices to alert motorists that the school bus is slowing to a stop; provided that the passengers are not required to cross any traffic lanes and also provided that the emergency flashing signal lights are activated in a manner which indicates that drivers should proceed with caution and, in such case, the driver of a vehicle may proceed past the school bus with due caution. No driver of a school bus shall take on or discharge passengers at any location upon a highway consisting of four (4) or more lanes of traffic, whether or not divided by a median or barrier, in such manner as to require the passengers to cross more than two (2) lanes of traffic; nor shall any passengers be taken on or discharged while the vehicle is upon the road or highway proper unless the vehicle so stopped is plainly visible for at least five hundred (500) feet in each direction to drivers of other vehicles in the case of a highway with no shoulder and a speed limit greater than sixty (60) miles per hour and at least three hundred (300) feet in each direction to drivers of other vehicles upon other highways, and on all highways, only for such time as is actually necessary to take on and discharge passengers.
E. 
The driver of a vehicle upon a highway with separate roadways need not stop upon meeting or overtaking a school bus which is on a different roadway, which is proceeding in the opposite direction on a highway containing four (4) or more lanes of traffic, or which is stopped in a loading zone constituting a part of, or adjacent to, a limited or controlled access highway at a point where pedestrians are not permitted to cross the roadway.
[CC 1970 §18-60; Ord. No. 621 §§40, 122; Ord. No. 723 §1, 11-5-1968]
Signs shall be installed and erected at the street intersections or crosswalks lawfully designated as a "School Stop", and set out in Schedule III of this Title. When such signs are placed facing traffic, every driver of a vehicle facing such sign shall bring his/her vehicle to a complete stop and yield the right-of-way to all children and other persons crossing thereafter and shall not proceed until safe to do so.