Where:
On any public road where specific restrictions for heavy vehicles apply.
Typically used on bridges, certain lanes, or roads that can safely accommodate vehicles above a specified mass.

Purpose:
To direct drivers of heavy vehicles exceeding a certain Gross Vehicle Mass (GVM) or Gross Combination Mass (GCM) to use a designated part of the road.
Ensures the safe distribution of traffic, prevents road damage, and reduces the risk of accidents caused by heavy vehicles traveling in unsuitable lanes or roads.

Action:
If your vehicles GVM or GCM exceeds the mass indicated on the sign (in tons), you must use only the road, lane, or section indicated by the sign.
If your vehicles GVM or GCM is less than the mass indicated, you must avoid using the part of the road designated for heavier vehicles.
Drive carefully, obeying the designated lane or section, and maintain awareness of other traffic.
Ensure compliance to avoid damage to infrastructure and legal penalties.