(a) Except as otherwise provided in subsection (c) of this section, local laws, ordinances, orders, rules, regulations, administrative code provisions and sanitary and health code provisions existing on the effective date of this section, shall, to the extent that they do not conflict with the provisions of this chapter, be given the following effect: 1. Orders of the department of transportation prohibiting or restricting stopping, standing or parking of vehicles and local laws, ordinances, orders, rules and regulations adopted by local authorities prohibiting or restricting stopping, standing or parking of vehicles shall henceforth be construed to prohibit or restrict stopping, standing or parking as defined in this chapter. 2. All other orders of the department of transportation affecting traffic and all other local laws, ordinances, orders, rules, regulations, administrative code provisions and sanitary and health code provisions affecting traffic shall henceforth be construed as if they had been adopted pursuant to this chapter.

(b) Except as otherwise provided in subsection (c) of this section, the local laws, ordinances, orders, rules, regulations, administrative code provisions and sanitary and health code provisions referred to in this section shall be deemed severable so that they shall be null and void only to the extent and only at the locations that they conflict with provisions of this chapter.

(c) Any local law, ordinance, order, rule, regulation, administrative code provision or sanitary or health code provision which was in existence on the effective date of this section, and which conflicts with the provisions of this chapter, shall nevertheless continue in effect and be construed as if adopted pursuant to this chapter, in any case where the same would validly supersede the provisions of this chapter if it were adopted after the effective date of this section, pursuant to any provision of sections sixteen hundred thirty, sixteen hundred thirty-one or sixteen hundred forty-two.