As per IRC:SP:90-2010, the minimum vertical clearance requirement for road underpasses is:
5.0 m in general and 5.5 m in urban areas
The question is about the minimum vertical clearance requirement for road underpasses as per the IRC:SP:90-2010. Let's analyze the given options and find the correct answer:
- 3.5 m for minor roads only: This is not correct according to the IRC standards for road underpasses. The clearance for minor roads generally isn't this low.
- 6.25 m above railway track level: This option refers to clearance levels over railway tracks, not road underpasses.
- 4.5 m in all cases: This is incorrect as the standard clearance is higher especially in urban environments.
- 5.0 m in general and 5.5 m in urban areas: As per IRC:SP:90-2010, this is the correct minimum vertical clearance requirement for road underpasses. It suggests 5.0 m for general cases and 5.5 m for urban areas, where taller vehicles and higher traffic density may require more space.
The correct answer is 5.0 m in general and 5.5 m in urban areas. The IRC guidelines specify different clearance heights based on the location (general or urban) to ensure safety and accommodate varying traffic conditions.
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