[Traf. Code § 83q]
The Traffic Engineer shall test, place and maintain, or remove, traffic-control signs, signals, lane markings and other devices and shall determine the hours and days during which any traffic-control device shall be in operation or be in effect, when and as required under this chapter, to indicate and to carry out the provisions of this chapter, and may test, place and maintain such additional traffic-control devices as he may deem necessary to regulate traffic under this chapter and under state law and to warn or guide traffic.
[Traf. Code § 83r]
Notwithstanding the authority granted to the Traffic Engineer under this chapter, no stop signs, pavement markings, buttons or other traffic-control devices shall be erected or maintained upon any state trunk-line highway under the jurisdiction of the state highway commissioner, without the latter's written permission.
[Traf. Code §§ 42, 43]
It shall be unlawful for the operator of any vehicle to fail or refuse to obey any traffic-control device placed in accord with the provisions of this chapter or the Michigan Vehicle Code unless otherwise directed by a police officer. No such operator shall attempt to avoid obedience to any traffic-control device by driving upon or through any private property.
[Traf. Code § 83e]
The Traffic Engineer is hereby authorized to mark lanes upon the roadway of any street where he shall find that a regular alignment of traffic is necessary in the interests of safety and efficiency, or at such places as he may find to be advisable, consistent with this chapter and state law.
[Traf. Code § 1; amended 4-19-1976 by Ord. No. 1083]
Whenever traffic is controlled by traffic-control signals, at least one signal shall be located over the traveled portion of the roadway so as to give drivers a clear indication of the right-of-way assignment from their normal positions approaching the intersection. The vehicle signals shall exhibit different colored lights successively, one at a time or with arrows. The following colors shall be used and such lights shall indicate and apply to drivers of vehicles as follows:
A. 
Green indication. Vehicular traffic facing the signal may proceed straight through or turn right or left, unless a sign at such place prohibits either such turn; but vehicular traffic, including vehicles turning right or left, shall yield the right-of-way to other vehicles and to pedestrians lawfully within the intersection or an adjacent crosswalk at the time such signal is exhibited.
B. 
Steady yellow indication. Vehicular traffic facing the signal shall stop before entering the nearest crosswalk at the intersection, or at a limit line when marked, but if such stop cannot be made in safety, a vehicle may be driven cautiously through the intersection.
C. 
Steady red indication. Vehicular traffic facing a steady red signal alone shall stop before entering the crosswalk on the near side of the intersection, or at a limit line when marked, or if none, then before entering the intersection, and shall remain standing until a green indication is shown; provided that after so stopping, vehicular traffic shall be privileged to make a right turn from a one-way or two-way street into a two-way street or into a one-way street carrying traffic in the direction of the right turn; or a left turn from a one-way or two-way street into a one-way street carrying traffic in the direction of the left turn, unless prohibited by sign, signal, marking, light or other traffic-control device. Vehicular traffic so turning shall yield the right-of-way to pedestrians lawfully within an adjacent crosswalk and to other traffic lawfully using the intersection.
D. 
Arrow indications:
(1) 
Green arrow (steady). Vehicular traffic facing a green arrow signal, shown alone or in combination with another indication, may cautiously enter the intersection only to make the movement indicated by such arrow or such other movement as is permitted by other indications shown at the same time. Such vehicular traffic shall yield the right-of-way to pedestrians lawfully within a crosswalk and to other traffic lawfully using the intersection.
(2) 
Red arrow (flashing). When a red arrow is illuminated by 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 shall then be privileged to make the movement indicated, if no interference is offered pedestrians or vehicles lawfully on the street.
In the event a traffic-control signal is erected and maintained at a place other than an intersection, the provisions of this section shall be applicable, except as to those provisions which, by their nature, can have no application. Any stop required shall be made at a sign or marking on the pavement indicating where the stop shall be made; but in the absence of any sign or marking, the stop shall be made at the signal.
[Traf. Code § 1]
A. 
Whenever flashing red or yellow signals are used they shall require obedience by vehicular traffic as follows:
(1) 
Flashing red (stop signal). When a red lens is illuminated by 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.
[Traf. Code § 84]
A. 
Except with authority of a statute or ordinance or of a duly authorized public body or official, no person shall place, maintain or display, along any highway or upon any structure in or over any highway, any sign, signal, marking, device, blinking, oscillating or rotating light or lights, decoration or banner which is or purports to be or is in imitation of or resembles or which can be mistaken for a 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 traffic-control device or any railroad sign or signal, and no person shall place or maintain, nor shall any public authority permit upon any highway any traffic sign or signal bearing thereon any commercial advertising.
B. 
No person shall place, maintain or display along any highway any blinking, oscillating or rotating light or lights sufficiently similar in color and design that they may be mistaken for the distinguishing lights authorized by law for emergency vehicles or that create a hazard for the safety of drivers using the highways.
C. 
This section shall not be deemed to prohibit the erection, upon private property adjacent to streets, of signs giving useful directional information and of a type that cannot be mistaken for traffic signs or signals.
D. 
Every sign, signal, marking, device or light prohibited by this section is hereby declared to be a public nuisance and the Traffic Engineer is hereby empowered to remove the same, or cause it to be removed, without notice.