Classification of traffic signs:
(1) Mandatory/Regulatory signs:
        •    The regulatory or mandatory signs are used to inform the road Users of certain laws and regulations to provide safety and free flow to traffic.
        •    Shape: Circular
Note:
Exception: Stop and Give way sign

         

The Stop sign is octagonal in shape and the Give way sign has the shape of an inverted triangle.
(2) Warning signs:
        •    These signs are used to warn the road users at sufficient distance in advance about the impending road condition.
        •    Warning signs are also known as cautionary signs.
        •    Shape: Triangle
(3) Informatory signs:
        •    Informatory signs are provided to guide the road user about the routes, destination, and to provide information that makes travel easier, safe, and pleasant.
        •    Shape: Rectangle