Where:
This sign is displayed at the start of a dual-carriageway freeway.
It marks the point where a standard road transitions into a controlled-access freeway with multiple lanes in each direction, separated by a central median or barrier.

Purpose:
The purpose of this sign is to inform drivers that they are entering a freeway and that specific freeway rules and regulations now apply.

This helps to;
    Alert drivers to changes in speed limits, lane usage, and traffic flow,
    Prepare drivers for controlled access, limited entry and exit points, and higher-speed traffic,
    Ensure compliance with freeway-specific laws, such as overtaking regulations, no stopping on the carriageway, and lane discipline, and
    Enhance safety for all users by clarifying that normal road rules no longer apply in the same way.

Action:
Follow all freeway rules from this point onwards, including;
Observing speed limits set for freeways,
Maintaining lane discipline and using the correct lanes for overtaking,
No stopping except in emergencies or designated areas,
Using entry and exit ramps for joining or leaving the freeway.
Be aware of signage and signals specific to freeway driving, such as lane closures or variable speed limits.