What do the speed limits set for a road depend on?

A)Primarily on economic criteria.
B)On its layout and the number of bends.
C)On its layout and the traffic it will have to handle.Correct
Behind the speed limits of a road, there are a number of technical criteria such as, for example, the design speed, the acceptable level of congestion, existing traffic demands, the types of vehicles that will use them, the environmental and ecological impact, etc.