The City Council is hereby authorized and, as to those signs and signals required hereunder, it shall be its duty to place and maintain or cause to be placed and maintained all official traffic signs, signals, markings and safety zones. All signs, signals, markings and safety zones shall conform to the standards as prescribed by the Department of Public Works of the Commonwealth of Massachusetts.
Sections 260-3, 260-30, 260-17K and 260-18 to 260-23, inclusive, relating to parking, and §§ 260-45 and 260-46, relating to turning movements, shall be effective only during such time as official signs are erected and maintained in each block designating the provisions of such sections and located so as to be easily visible to approaching drivers.
Sections relating to one-way streets shall be effective only during such time as a sufficient number of official signs are erected and maintained at each of the exits for each one-way street so that at least one sign will be clearly visible for a distance of at least 75 feet to drivers approaching such an exit.
Regulations relating to commercial vehicle parking shall be effective only during such time as a sufficient number of official signs are erected and maintained at each of the main arterial entrances to the City.
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, marking or device which purports to be or is an imitation of or resembles an official traffic sign, signal, marking or device or which attempts to direct the movement of traffic or which hides from view any official sign or signal. The Chief of Police is hereby empowered to remove every such prohibited sign, signal, marking or device or cause it to be removed without notice.
Any person who willfully defaces, injures, moves, obstructs or interferes with any official traffic sign, signal or marking shall be liable to a penalty not exceeding $20 for each offense.
No driver of any vehicle shall disobey the instruction of any official traffic control signal, sign, marking, marker or legend unless otherwise directed by a police officer.
For the purposes of trial, the City Council may make temporary rules regulating traffic or test under actual conditions traffic signs, markings or other devices. No such experimental rule regulating traffic shall remain in effect for a period of time longer than 30 days.