Where:
Displayed on any public road, at the entrance to pedestrian or separate cycle lanes, or at certain sections of a carriageway where motorcycle access is restricted.
This sign may also be found at the beginning of roads or lanes specifically designated for other types of vehicles or for non-motorised traffic.

Purpose:
The sign is used to prohibit motorcycles from entering or using a particular section of the road.

The restriction is usually implemented for safety reasons, such as;
    Areas with high pedestrian or cyclist activity,
    Roads not designed to safely accommodate motorcycles,
    Freeways or sections of highways where motorcycles may pose a risk to themselves or to other vehicles.

Action:
If you are riding a motorcycle, do not enter the section of road, lane, or path where this sign is displayed.
If this sign appears on a freeway, motorcyclists must exit at the first available off-ramp.
Always follow the alternative routes provided or seek other access roads where motorcycles are permitted.

Where:
This sign is displayed on any public road, lane, path, or designated area where the entry or use of motorcars and similar motor vehicles is not permitted.

It is commonly found at;
    Pedestrian zones or shared public spaces,
    Cycle lanes or recreational paths,
    Restricted residential areas, or
    Private or environmentally sensitive zones where motor traffic is controlled.

Purpose:
The purpose of this sign is to prohibit motorcars or motor vehicles from entering or travelling beyond the point where the sign is displayed.

This restriction is often enforced to;
    Ensure pedestrian and cyclist safety,
    Reduce noise or air pollution,
    Preserve infrastructure not designed for motor traffic, or
    Maintain restricted or controlled zones such as parks, promenades, or event areas.

Action:
If you are driving a motorcar or any motorised vehicle, do not proceed beyond this sign.
Use an alternative route designated for motor vehicles.
Be aware that entering a restricted zone may result in fines or penalties.

Where:
This sign is displayed on any public road, lane, path, or designated area where taxis are not allowed to enter or operate.

It may appear;
    At the entrance to private or restricted areas,
    On lanes reserved for specific vehicle types (e.g. buses or cyclists),
    In residential zones, business districts, or tourist areas where taxi traffic is restricted, or
    On freeways or sections of roads not suitable or permitted for taxis.

Purpose:
The purpose of this sign is to prohibit taxis from entering or using a particular section of road or area.
This restriction may be implemented for reasons such as;
    Traffic management - to reduce congestion caused by frequent stopping or loading,
    Safety concerns - where road design or conditions make it unsafe for taxis,
    Environmental control - to limit vehicle emissions in pedestrian or eco-sensitive zones, or
    Operational zoning - to ensure that only authorised vehicles use specific routes or areas.

Action:
If you are driving a taxi, do not proceed beyond this sign.
Look for alternative access routes or designated taxi zones where stopping and operating are allowed.
Failing to comply with this sign may result in fines or other enforcement action.