What are the differences between main roads and auxiliary roads?

[McJulianna]

The differences between main roads and auxiliary roads: 1. Different traffic users: Main roads are only for motor vehicles; auxiliary roads allow mixed traffic of motor vehicles, non-motor vehicles, and pedestrians. 2. Different speed limits: The speed limit on main roads can exceed 80 km/h; the speed limit on auxiliary roads must not exceed 60 km/h. Urban roads are classified into four levels: expressways, arterial roads, secondary arterial roads, and branch roads, with the following width controls: 1. The design speed of expressways is 60 to 100 km/h, with a width of no less than 40 meters; 2. The design speed of arterial roads is 40 to 60 km/h, with a width of 30 to 40 meters; 3. The design speed of secondary arterial roads is 30 to 50 km/h, with a width of 25 to 40 meters; 4. The design speed of branch roads is 20 to 40 km/h, with a width of 12 to 25 meters.