The speed of main roads in Changchun requires 60 km/h, and the speed limit of main roads in Changchun follows the relevant provisions of the Road Traffic Safety Law of the People's Republic of China. According to the comprehensive consideration of urban road grades, traffic flow, road section characteristics and other factors, different speed limit signs and speed limit values are set. The specific speed requirements are as follows:
1. Changchun main road: in the urban area, the speed limit standard of most main roads is 60 km/h, and a few of them have speed limit signs of 40 km/h or 80 km/h.
2. Urban expressways: expressways in urban areas are divided into urban trunk roads and loop expressways, and the speed limit standard is generally 80 km/h. ..
3. Elevated Ring Road: The speed limit standard of Changchun Ring Expressway is100 km/h. ..