The maximum safe speed that can be maintained on a section of road in favourable conditions is the...
A)flow speed of a road.
B)appropriate speed of a road.
C)design speed of a road.Correct
All roads have established speed limits with the sole purpose of providing road users with maximum guarantees of safety and traffic flow. On a road, the design speed is the maximum speed at which we can drive safely under normal conditions.
The traffic-flow speed of a road is, on the other hand, the speed which, due to the road's characteristics, allows the smoothest flow of traffic.