The sign corresponding to "Prohibition for motor vehicles and trains that cannot or are not allowed to drive faster than 25 km/h" indicates that vehicles which can only travel at a maximum speed of 25 km/h or less are not permitted to enter the area. This typically includes certain types of agricultural vehicles, mopeds, or bicycles with electric assistance that are limited to this speed.

In practice, this sign aims to keep faster-moving traffic separate from slower-moving vehicles to enhance road safety. If you are driving a vehicle that exceeds this speed limit, you are allowed to enter the area, but those slower vehicles must not proceed. Always be vigilant and respectful of such restrictions to ensure safe and compliant driving.

If you have any further questions about your preparation for the driving license test or any other traffic rules, feel free to ask!