Under normal conditions, the appropriate speed is always...

Under normal circumstances, driving below the minimum speed is just as dangerous as driving above the maximum speed on fast roads. The most correct approach is to drive at the appropriate speed, which is the one adapted to the circumstances of the moment. It is important to bear in mind that, under special circumstances, such as adverse weather conditions or traffic congestion, the appropriate speed may be lower than the minimum permitted. However, it will never be justified for the appropriate speed to exceed the maximum permitted.