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F192069 Pages:2

CBR value 5%. The borrow material has a CBR value of 12%. The traffic
volume on a two lane single carriage way in both directions at last count is
1200commercial vehicles per day. Design a flexible pavement as per IRC37 -
2012. Traffic growth rate is 6% .

Explain the procedure for determination of CBR value of a subgrade soil.

Discuss the various causes of failures in flexible pavements. With the help of
sketches explain any five types of flexible pavement failures.

Describe the specifications of materials and construction steps of bituminous
concrete pavements.

Discuss any five properties of bitumen and their effect on the performance of
bituminous mixes in pavements. Explain the laboratory teststo be conducted to
assess these properties.

PART ^
Answer any two full questions, each carries 20 marks.

With neat sketches, explain different at grade intersections.

What are the factors that are to be considered for site selection of an airport.

Two roads A and B meet at right-angles. The normal flow and saturated flow on
road A are 750PCU/hr and 3600 PCU/hr respectively. On road B normal flow is
550 PCU/hr and saturated flow is 2700PCU/hr. Theall red time is 10sec. Design
a two-phase isolated traffic signal for the intersection and sketch the phase
diagram.

With sketches, list out any six types of warning signs on highways.

What is wind rose diagram? Explain how Type | wind rose diagram is used for
determination of runway orientation.

Discuss how various aircraft characteristics influence the planning of airport.
What are the different systems of signal coordination?

Discuss the facilities to be provided and factors considered for planning an
airport terminal building.

Runway of an airport is situated at an elevation of 250m and has an effective
gradient of 0.3%. Airport reference temperature is 18°C. The basic runway length

is 2500m. Determine the actual required length of runway.

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