(a) A personal delivery device or mobile carrier may operate on sidewalks and crosswalks. A personal delivery device or mobile carrier operating on a sidewalk or crosswalk has all the rights and duties applicable to a pedestrian under the same circumstances, except that the personal delivery device or mobile carrier shall not unreasonably interfere with pedestrians or traffic, and shall yield the right-of-way to pedestrians on the sidewalk or crosswalk.
(b) Personal delivery devices and mobile carriers shall:
(1) Obey all official traffic and pedestrian control signals and devices;