The sign you are referring to is called "Special vehicles and transport goods free" (sign number 1026-32). This traffic sign indicates that the specified restrictions on vehicle types or weight limits are not applicable to certain special vehicles, such as emergency vehicles, public transport buses, or vehicles that are transporting goods.

In general, when this sign is present, it serves to clarify that while there may be restrictions for most vehicles, designated special vehicles are allowed to proceed without limitations. This helps facilitate the movement of essential services and ensures that important deliveries or emergency responses are not hindered by traffic regulations meant for typical road users.

It's important for drivers to be aware of this sign, as it underscores the need to give way to special vehicles that might be operating under such exemptions. Always remain attentive to these signs and their implications while driving.