[Amended 10-4-1999]
The Selectmen are hereby authorized and, as to those signs and signals required hereunder, it shall be their duty to place and maintain or cause to be placed and maintained all official traffic signs and signals. All signs required hereunder for a particular purpose shall so far as practicable be uniform as to type and location throughout the town.
No provision of these rules and orders for which signs are required shall be enforceable against an alleged violator if at the time and place of the alleged violation the sign herein required is not in the 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.
It shall be unlawful for any operator to disobey the instructions of any official traffic sign or signal placed in accordance with the provisions of these rules and orders, unless otherwise directed by a police officer.
A flashing yellow light with a sign attached to read "School Buses Entering Ahead" shall be installed in the vicinity of the following school locations:
A. 
Graniteville Road (near) High School entrance (200 Richardson Road).
B. 
North Road near the McCarthy School (250 North Road).
C. 
Boston Road near the South Row School (250 Boston Road).
D. 
Graniteville Road near the Parker School (75 Graniteville Road).
E. 
Richardson Road near the Harrington School and entrance to High School (120 Richardson Road).
F. 
Billerica Road near the Center School (84 Billerica Road).
G. 
Dalton Road near the Westlands School (170 Dalton Road).
H. 
Brick Kiln Road, the location of the Murdoch Charter School.
[Added 12-2-2002]
[NOTE: See Article 47, ATM 1973]
A. 
Colors in traffic control signals shall have the commands ascribed to them in this section and no other meanings, and no driver of a vehicle or operator of a railway car shall fail to comply with said commands, except when otherwise directed by a police officer or lawful traffic regulating sign, signal device.
(1) 
Red. While the red lens is illuminated, no driver of a vehicle facing the signal shall enter the intersection; provided, however, that if a right, left or vertical green arrow is illuminated at the same time, a driver may enter the intersection to make the movement permitted by the green arrow or arrows.
(2) 
Yellow. While the yellow lens is illuminated no waiting driver of any vehicle shall proceed until the green lens is illuminated, and any driver of a vehicle approaching the intersection who can stop said vehicle with safety before reaching the intersection or a marked stop line shall stop at such point; provided, however, that if a right, left or vertical green arrow is illuminated at the same time a driver may enter the intersection to make the movement permitted by the green arrow or arrows.
(3) 
Green.
(a) 
While the green lens is illuminated, the driver of a vehicle facing the signal may proceed in any direction, notwithstanding the use or not of any special right, left or vertical green arrow lens which may be incorporated in such signal.
(b) 
Special green arrow. When a special right, left or vertical (meaning straight ahead) green arrow lens is incorporated in a signal, drivers facing said signal may, regardless of either red or yellow indications, turn right or left or go straight ahead, respectively, in accordance with the movement permitted by the green arrow or arrows illuminated at the time. In no case shall a driver proceed without due regard for the safety of those persons already within the intersection.
(4) 
Red and yellow. While the red and yellow lenses are illuminated together no driver of a vehicle shall enter the intersection, and during such time the intersection shall be reserved for the exclusive use of pedestrians.
(5) 
Flashing red. The red lens, when illuminated with rapid intermittent flashes, shall indicate those intersections at which a driver is required by law to stop before entering.
(6) 
Flashing yellow. The yellow lens, when illuminated with rapid intermittent flashes, shall indicate the presence of a hazard and shall permit drivers to proceed only with caution.
B. 
The word "intersection" as used in this section shall mean any intersection of one or more ways with another and any intersection of ways with a railroad.
It shall be unlawful for any person to place or maintain or to display upon or in view of any street any unofficial sign, signal or device which purports to be or is an imitation of or resembles an official traffic sign or signals or which attempts to direct the movement of traffic or which hides from view any official traffic sign or signals. Every such prohibited sign, signal or device is hereby declared to be a public nuisance, and the Selectmen are hereby empowered to remove the same or cause it to be removed without notice.
It shall be unlawful for any person to willfully deface, injure, move or obstruct or interfere with any official traffic sign or signal.
The Selectmen are hereby authorized to establish and to designate and shall thereafter maintain or cause to be maintained, by appropriate devices or lines upon the surface of the roadway, crosswalks at intersections where, in their opinion, there is particular danger to pedestrians crossing the roadway and at such other places as they may deem necessary.
A. 
The Selectmen are hereby empowered to establish safety zones of such kind and character at such places as they may deem necessary for the protection of pedestrians.
B. 
The Selectmen are authorized to mark lanes for traffic on street pavements at such places as they may deem advisable consistent with the provisions of these rules and orders.