Traffic and Pedestrian Safety; Citing this act as the "Sophia Nelson Pedestrian Safety Act"; requiring a traffic engineering study to be conducted which recommends installation of a specified pedestrian crosswalk before such installation occurs; requiring a pedestrian crosswalk on a public highway, street, or road which is located at any point other than at an intersection with another public highway, street, or road to conform to specified requirements; providing coordination requirements for certain devices and signals; requiring that traffic control signal devices at adjacent intersections be taken into consideration, etc.