The traffic sign you referred to, "Special vehicles and transport goods free" (1026-31), indicates that certain special vehicles, such as those used for public transport, emergency services, or vehicles carrying specific goods, are exempt from restrictions that may apply to other vehicles.

This sign is usually placed in areas where there are traffic limitations, such as on certain roads or during specific times of day, allowing designated vehicles to bypass these restrictions.

It is essential for drivers to recognize this sign and understand that it allows certain vehicles to operate in areas or under conditions where other regular traffic is restricted. Always pay attention to additional signage and context, as the exact regulations can vary by location.