The municipality seems to consider it as part of the road since they've put Г14 signs (https://adhold.org/wp-content/uploads/2020/04/G14.jpg) on the street lamps on the existing section of Todor Kableshkov. If it was part of the sidewalk, the would've put Г16.1 (https://adhold.org/wp-content/uploads/2020/04/G16.1.jpg). The second sign can be seen along the sidewalks of Buxton Brothers Blvd and the shared paths along the Perlovska river.