Reversing is prohibited on **motorways and expressways** at all times. This means that you cannot drive in reverse on these roads under any circumstances. Expressways are roads designed for fast and safe traffic, and allowing reversing could create dangerous situations due to the high speed of vehicles traveling on them.

On other types of roads, reversing is only allowed in specific situations, such as when performing parking maneuvers or when it is not possible to move forward or change direction, but even in these cases, there are additional restrictions, such as not reversing more than 15 meters and not entering road intersections.

Therefore, the prohibition of reversing on expressways is a safety measure to prevent accidents and maintain traffic flow.