What is the general speed limit for driving in urban areas?

[McJayla]

Here are two scenarios regarding speed limits for urban driving: On roads with speed limit signs and markings: Motor vehicles on the road must not exceed the speed indicated by the speed limit signs and markings; The maximum speed for low-speed trucks, tricycles, etc. on the road is 30 kilometers per hour. The maximum speed for freight trucks carrying workers, full trailers, freight trucks transporting hazardous chemicals, etc. on urban roads is 50 kilometers per hour, and the maximum speed on closed motor vehicle-only roads and highways is 60 kilometers per hour. On roads without speed limit signs and markings: The maximum speed on urban roads is 70 kilometers per hour, and the maximum speed on closed motor vehicle-only roads and highways is 80 kilometers per hour; On roads with only one motor vehicle lane in the same direction, the speed limit is 50 kilometers per hour on urban roads and 70 kilometers per hour on highways.