500
400
600
800
Answer is Right!
Answer is Wrong!
The correct answer is: A. 500 meters.
A caution indication board will be provided at 500 meters from the bridge or vulnerable places. This is to warn drivers of the upcoming hazard and to allow them to slow down and take appropriate action.
Option B, 400 meters, is too close. This would not give drivers enough time to react and slow down.
Option C, 600 meters, is too far. This would not be effective in warning drivers of the upcoming hazard.
Option D, 800 meters, is also too far. This would not be effective in warning drivers of the upcoming hazard.
It is important to have caution indication boards at bridges and other vulnerable places to warn drivers of the upcoming hazard. This helps to prevent accidents and keep drivers safe.