All regulations of this chapter are subject to the provisions that all persons must at all times comply with any direction, by voice or hand, of any law enforcement officer as to stopping, placing, starting, approaching or departing from any place, the manner of taking up or setting down passengers or loading or unloading goods at any place.
The Town Manager and Chief of Police shall determine and designate the character of all official warning and direction signs and signals; the Chief of Police shall place and maintain the same; and all signs herein authorized and required for a particular purpose shall be uniform.
The Selectmen shall establish safety zones and crosswalks wherever, in their opinion, there is particular danger to pedestrians, and designate and maintain the same by appropriate devices, marks or white lines upon the surface of the roadway.