Including: inner city area, inner town + from signboard Start of densely populated area to signboard End of densely populated area.
Answer answer 1 is not enough, answer 3 is wrong because the road is crowded.
Roads located in the inner city, inner town, inner town, industrial park with many people and vehicles participating in traffic.
Roads located within the inner city, within the town and the road sections are determined from the effective position of the sign "Start of the densely populated area" to the effective position of the sign "End of densely populated area" sign
Roads with a large number of people, vehicles participating in traffic and road sections determined from the effective position of the sign "Start of the densely populated area" to the effective position of the sign "End of densely populated area".