This sign indicates that on a stretch with frequent fog:
A)It is advisable to reduce speed with no obligation to maintain a specific distance.
B)The sign indicates the proximity of a rest area.
C)The number of luminous beacons indicated by the sign must be maintained between vehicles.Correct
The sign is used on stretches where loss of visibility due to fog is common. It requires drivers to maintain the minimum distance indicated from the vehicle ahead, using the luminous beacons installed at the edge of the road as a reference. These beacons, visible even in low-visibility conditions, allow the driver to precisely calculate the safety gap, reducing the risk of multiple collisions.