Hazard markers reflecting yellow light should be visible from a long distance of about
- A150 mCorrect
- B100 m
- C200 m
- DNone of the above
Solution
Concept
Visibility distance of hazard markers
Formula
NONE
Step-by-step solution
1. Hazard markers are road delineation markers provided to guide traffic at hazards or sharp curves. 2. Standard specifications require hazard markers reflecting yellow light to be clearly visible from a distance of at least 150 m under normal night conditions. 3. Therefore, 150 m is the required visibility distance. Answer: A
Explanation
Hazard markers are installed along roadways to alert drivers to unexpected hazards or changing alignments. According to IRC standards, these markers reflect yellow light and must be clearly visible from a distance of at least 150 meters. This distance ensures drivers have sufficient time to react safely.
Why the other options are wrong
B) 100 m is less than the standard required visibility distance of 150 m for hazard markers. C) 200 m exceeds the standard requirement of 150 m. D) Option A is the correct answer.
Shortcut
NONE
Common mistake
Selecting common round numbers like 100 m or 200 m instead of the IRC standard distance of 150 m.
Correct answer: A) 150 m