The traffic sign you mentioned, "special vehicles and transport goods free" (sign number 1026-30), indicates that certain special vehicles are allowed to use the road without restrictions. This sign often applies to vehicles that are designed to transport goods, such as delivery trucks or service vehicles, which may have been given specific permission to operate in areas where other vehicles might have limitations.

In practice, this can mean that while regular vehicles may face restrictions (like weight limits or specific access limitations), the designated special vehicles or those transporting goods can proceed freely. It is essential for drivers to be aware of these signs, as they determine where they can and cannot drive, ensuring compliance with local regulations.

If you have any more questions about driving rules or specific scenarios, feel free to ask!