Motorway chainage and distance to the Piacenza exit

The motorway sign shows 54 on the left and PIACENZA 4 on the right. In the official questions, the left-hand number is the motorway chainage, meaning the progressive distance in kilometres from the motorway's point of origin. The right-hand number states how far it is to the toll station or interchange for Piacenza. The number 4 means that the Piacenza exit is 4 kilometres away. The number 54 is neither the motorway number nor an advisory speed, and the sign does not mark the beginning of a built-up area.