The City Traffic Engineer shall place and maintain traffic control signs, signals and devices when and as required under the traffic ordinances of the City to make effective the provisions of said ordinances and may place and maintain such additional traffic control devices as he/she may deem necessary to regulate traffic under the traffic ordinances of the City or under State law or to guide or warn traffic.
All traffic control signs, signals and devices shall conform to the manual and specifications approved by the State Highways and Transportation Commission or resolution adopted by the City Council of the City. All signs or signals required hereunder for a particular purpose shall so far as practicable be uniform as to type and location throughout the City. All traffic control devices so erected and not inconsistent with the provisions of this Title shall be official traffic control devices.
The driver of any vehicle shall obey the instructions of any official traffic control device applicable thereto placed in accordance with the provisions of this Title, unless otherwise directed by a traffic or Police Officer, subject to the exceptions granted the driver of an authorized emergency vehicle in this Title.
No provision of this Title for which official traffic control devices are required shall be enforced against an alleged violator if at the time and place of the alleged violation an official device is not in proper position and sufficiently legible to be seen by an ordinarily observant person.
A. 
Whenever official traffic control devices are placed in position approximately conforming to the requirements of this Title, such devices shall be presumed to have been so placed by the official act or direction of lawful authority, unless the contrary shall be established by competent evidence.
B. 
Any official traffic control device placed pursuant to the provisions of this Title and purporting to conform to the lawful requirements pertaining to such devices shall be presumed to comply with the requirements of this Title, unless the contrary shall be established by competent evidence.
A. 
Signs Required For Enforcement Purposes. No provision of this Chapter for which signs are required shall be enforced against an alleged violator if, at the time and place of the alleged violation, the sign herein required is not in proper position and sufficiently legible to be seen by an ordinarily observant person. Whenever a particular section does not state that signs are required, such section shall be effective without signs being erected to give notice thereof.
B. 
Traffic Control Signal Legend.
1. 
Whenever traffic at an intersection is controlled by traffic control signals exhibiting different colored lights successively one at a time, or with arrows, said lights shall indicate and apply to drivers of vehicles and pedestrians as follows:
a. 
Green alone or green with arrow.
(1) 
Vehicular traffic facing the signal may proceed straight through or turn right or left unless a sign at such location prohibits either turn, except that vehicular traffic, including turning vehicles, shall yield the right-of-way to pedestrians and other vehicles lawfully within the intersection or an adjacent crosswalk at the time such signal was exhibited.
(2) 
Pedestrians facing the signal may proceed across the roadway within any marked or unmarked crosswalk, unless directed otherwise by a pedestrian signal.
b. 
Steady yellow alone.
(1) 
Vehicular traffic facing the signal shall stop before entering the crosswalk on the near side of the intersection, or if none, the intersection, unless so close to the intersection that a stop cannot be made in safety.
(2) 
No pedestrian facing the signal shall enter the roadway unless authorized to do so by a pedestrian "walk" signal.
c. 
Steady red alone.
(1) 
Vehicular traffic facing the signal shall stop before entering the crosswalk on the near side of the intersection, or if none, before entering the intersection and shall remain standing until a green signal is shown; provided, however, that the driver of a vehicle which is stopped as close as practicable at the entrance to the crosswalk on the near side of the intersection, or if none, then at the entrance to the intersection in obedience to a red signal, may cautiously enter the intersection to make a right turn but shall yield the right-of-way to pedestrians and other traffic proceeding as directed by the signal at the intersection, except at such intersections where signs are erected prohibiting such right turn against red signal.
(2) 
No pedestrian facing such signal shall enter the roadway until the green is shown alone, unless authorized to do so by a pedestrian "walk" signal.
d. 
Steady red with green arrow or green arrow alone.
(1) 
Vehicular traffic facing such signal may cautiously enter the intersection only to make the movement indicated by such arrow, but shall yield the right-of-way to pedestrians lawfully within a crosswalk and to other traffic lawfully using the intersection.
(2) 
No pedestrian facing such signal shall enter the roadway until the green is shown alone, unless authorized to do so by a pedestrian "walk" signal.
e. 
Flashing red. When a red lens is illuminated with rapid intermittent flashes, vehicular traffic shall stop before entering the nearest crosswalk on the near side of the intersection, or if none, the intersection, and the driver, after having stopped, shall yield the right-of-way to any vehicle which has entered the intersection from another roadway or which is approaching so closely as to constitute an immediate hazard, but said driver, having so yielded, may proceed and the drivers of all other vehicles approaching the intersection shall yield the right-of-way to the vehicle so proceeding.
f. 
Flashing yellow. When a yellow lens is illuminated with rapid intermittent flashes, vehicular traffic may proceed through the intersection or past such signal only with caution.
2. 
The intersection controlled by electrically operated traffic signals shall be designated in Schedule IV hereof.
A. 
Whenever special pedestrian control signals exhibiting the words "Walk" or "Don't Walk" or appropriate symbols are in place, such signals shall indicate as follows:
1. 
"WALK": Pedestrians facing such signal may proceed across the roadway in the direction of the signal and shall be given the right-of-way by the drivers of all vehicles.
2. 
"WAIT" or "DON'T WALK": No pedestrian shall start to cross the roadway in the direction of such signal, but any pedestrian who has partially completed his/her crossing on the walk signal shall proceed to a sidewalk or safety zone while the wait signal is showing.
A. 
Whenever an illuminated flashing red or yellow signal is used in a traffic sign or signal, it shall require obedience by vehicular traffic as follows:
1. 
Flashing red (stop signal). When a red lens is illuminated with rapid intermittent flashes, drivers of vehicles shall stop before entering the nearest crosswalk at an intersection or at a limit line when marked or, if none, then before entering the intersection, and the right to proceed shall be subject to the rules applicable after making a stop at a stop sign.
2. 
Flashing yellow (caution signal). When a yellow lens is illuminated with rapid intermittent flashes, drivers of vehicles may proceed through the intersection or past such signal only with caution.
B. 
This Section shall not apply at railroad grade crossings. Conduct of drivers of vehicles approaching railroad grade crossings shall be governed by the rules as set forth in Section 335.090 of this Title.
When lane direction control signals are placed over the individual lanes of a street or highway, vehicular traffic may travel in any lane over which a green signal is shown but shall not enter or travel in any lane over which a red signal is shown.
No person shall place, maintain or display upon or in view of any highway an unauthorized sign, signal, marking or device which purports to be or is an imitation of or resembles an official traffic control device or railroad sign or signal, or which attempts to direct the movement of traffic, or which hides from view or interferes with the effectiveness of any official traffic control device or any railroad sign or signal.
No person shall without lawful authority attempt to or in fact alter, deface, injure, knock down or remove any official traffic control device or any railroad sign or signal or any inscription, shield or insignia thereon or any other part thereof.
The City Traffic Engineer shall have authority to declare any street or part thereof a play street and to place appropriate signs or devices in the roadway indicating and helping to protect the same.
Whenever authorized signs are erected indicating any street or part thereof as a play street, no person shall drive a vehicle upon any such street or portion thereof except drivers of vehicles having business or whose residences are within such closed area, and then any said driver shall exercise the greatest care in driving upon any such street or portion thereof.
A. 
The City Traffic Engineer is hereby authorized:
1. 
To designate and maintain, by appropriate devices, marks or lines upon the surface of the roadway, crosswalks at intersections where in his/her opinion there is particular danger to pedestrians crossing the roadway and at such other places as he/she may deem necessary.
2. 
To establish safety zones of such kind and character and at such places as he/she may deem necessary for the protection of pedestrians.
A. 
The City Traffic Engineer is hereby authorized to mark traffic lanes upon the roadway of any street or highway where a regular alignment of traffic is necessary.
B. 
Where such traffic lanes have been marked, it shall be unlawful for the operator of any vehicle to fail or refuse to keep such vehicle within the boundaries of any such lane except when lawfully passing another vehicle or preparatory to making a lawful turning movement.
[R.O. 2008 §190.040; Ord. No. 341, 11-20-1956]
A. 
No person or persons, trustee or trustees or person, firm or corporation having charge, control, custody or surveillance over any private street, road or lane in the City of Olivette shall place or maintain upon any private street, road or lane in the City of Olivette, traffic control barriers or other devices, structures, or facilities designed to control, regulate or lessen the movement or speed of traffic moving upon such private road, street or lane, which shall:
1. 
Extend more than eight (8) feet six (6) inches into the paved portion of said road and perpendicular to the sideline of said road, said eight and one-half (8½) feet to be measured from the curb line in the event that the private street, road or lane has curb or gutter and to be measured from the end of the paved portion of said road, street or lane if same does not have curb and gutter; and
2. 
Shall be closer than thirty-five (35) feet to any other traffic control device as described above, said thirty-five (35) feet to be measured along the centerline of said private street, road or lane from a point at said centerline located by a line perpendicular to the sideline of said private street, road and lane and extending from said sideline through the centerline of such respective traffic control devices or barriers as described above.
[R.O. 2008 §190.045; Ord. No. 1230, 2-28-1978]
Notwithstanding the placement of barriers in accordance with the provisions of Section 315.160, it shall be the obligation of the trustees or any other person, firm or corporation having charge or control over any private street or lane within the City to remove any such traffic control barriers or other devices, structures or facilities designed to control, regulate or lessen the movement or speed of traffic moving upon such private road or lane whenever there is an accumulation of snow of two (2) inches or more, or ice or freezing rain within the City.