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Dr. B R AMBEDKAR NATIONAL INSTITUTE OF TECHNOLOGY

Highway & Traffic Engineering (CEX-306)

B. Tech 6th Semester Minor I (19 Feb, 2015)

Time: 1Hour Max. Marks: 20

Note:- Attempt all the Questions. Assume necessary suitable data as per standards of IRC, if any missing. Symbols have their standard meaning.

1. The radius of a horizontal curve is 400m, the total pavement width at curve is 7.6 m and the superelevation

is 0.07. Allowable rate of introduction of superelevation is 1 in 150 (pavement to be rotated about the inner

edge). Design the transition curve length for NH to be aligned along plain terrain with ruling speed. (5)

2. Calculating the stopping sight distance on a National Highway at a descending gradient of 2% for a ruling

design speed for rolling terrain. Take t = 2.5 sec and f = 0.35. (4)

3. Calculate the values of ruling minimum radius of horizontal curve for design speeds of 100 kmph and 80

kmph. Also calculate the extra widening required for a pavement of width 7 m with Rruling obtained from 100

kmph and 80 kmph as per IRC recommendations. Take l = 6 m. (3)

4. Explain obligatory points. What are requirements of ideal alignment? (3)

5. Why the macadams method of road construction is considered better and more scientific as compared to

previous methods. (3)

6. State the objectives of widening the pavement on horizontal curves? (2)

Dr. B R AMBEDKAR NATIONAL INSTITUTE OF TECHNOLOGY

Highway & Traffic Engineering (CEX-306)

B. Tech 6th Semester Minor I (19 Feb, 2015)

Time: 1Hour Max. Marks: 20

Note:- Attempt all the Questions. Assume necessary suitable data as per standard of IRC, if any

missing. Symbols have their standard meaning.

1. The radius of a horizontal curve is 400m, the total pavement width at curve is 7.6 m and the superelevation

is 0.07. Allowable rate of introduction of superelevation is 1 in 150 (pavement to be rotated about the inner

edge). Design the transition curve length for NH to be aligned along plain terrain with ruling speed. (5)

2. Calculating the stopping sight distance on a National Highway at a descending gradient of 2% for a ruling

design speed for rolling terrain. Take t = 2.5 sec and f = 0.35. (4)

3. Calculate the values of ruling minimum radius of horizontal curve for design speeds of 100 kmph and 80

kmph. Also calculate the extra widening required for a pavement of width 7 m with Rruling obtained from 100

kmph and 80 kmph as per IRC recommendations. Take l = 6 m. (3)

4. Explain obligatory points. What are requirements of ideal alignment? (3)

5. Why the macadams method of road construction is considered better and more scientific as compared to

previous methods. (3)

6. State the objectives of widening the pavement on horizontal curves? (2)

Roll No: ___________

Roll No: ___________