What does the traffic sign shown (a simple upward-pointing arrow inside a circle) indicate?
Compulsory ahead
A blue circular sign showing a plain white upward-pointing arrow is a mandatory (regulatory) road sign in India, indicating that vehicles must proceed straight ahead only.
This class of sign, called “Compulsory Ahead,” instructs drivers that turning is not permitted at that point and they must continue in the direction of the arrow.
It is not a warning about a main road, a prohibition on right turns specifically, or a slip road indicator, all of which use different shapes or symbols.
Road signs such as those for narrow bridges and school zones are used to warn drivers about possible hazards or unusual conditions ahead on the road. These types of traffic signs are called ____.