Which of the following conclusions is/are correct in relation to the given road sign in the figure?

1. This sign is usually installed before a bridge.

2. It indicates the load that a bridge can bear.

3. It is a cautionary road sign.

Concept:

The road sign shown in the image indicates the axle load limit. It means that vehicles having an axle load exceeding 4 tonnes are not allowed beyond this point.

This type of sign is a regulatory sign, which enforces rules and restrictions, not just a cautionary warning.

Analysis of Statements:

Statement 1: "This sign is usually installed before a bridge."

Correct. These signs are placed near bridges to prevent vehicles with heavy axle loads from crossing and damaging the structure.

Statement 2: "It indicates the load that a bridge can bear."

Correct. It limits the maximum permissible axle load, which is indirectly related to the safe load-bearing capacity of the bridge.

Statement 3: "It is a cautionary road sign."

Incorrect. This is not a cautionary (warning) sign. It is a mandatory/regulatory sign shown with a red circular border, indicating restrictions.

Final Answer: Conclusions 1 and 2 are correct, while conclusion 3 is incorrect.