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GATE 2025 CE (CE2) – Question 18

Highway Pavements · Design of flexible and rigid pavements · 1 mark · Multiple choice

The recommended minimum traffic growth rate and design period considered for structural design of flexible pavements for national highways in India as per IRC 37:2018 is ______ percentage and ______ years, respectively.

  1. 5, 20
  2. 5, 30
  3. 7, 20
  4. 7, 30

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Correct answer: (A) 5, 20

Explanation

IRC 37:2018 recommends a minimum traffic growth rate of 5% when no data are available, and a design period of 20 years for national and state highways.