1 (a)
Describe the formula used for economic span of a Bridge starting assumptions made.

6 M

1 (b)
Following are the costs involved in a uniform multiple span bridge construction. Calculate the Economic span.

Span (m) | 5 | 9 | 13 | 16 |

Cost of Girder (Rs) | 1700 | 7000 | 16000 | 25000 |

Cost of single pier and its Foundation. (Rs) | 15000 | 20000 | 22000 | 33000 |

7 M

1 (c)
Derive expression for finding the extra widening required on a horizontal curve. Calculate the extra widening of pavement required on horizontal curve of radius 700 m. On two-lane highway. Assume Design Speed as 80 kmph, wheel base= 6m.

7 M

2 (a)
Explain the procedure involved in design of flexible pavement including the graphs required for the following methods.

i) Group Index Method.

ii) C.B.R ( California Bearing Ratio) method.

i) Group Index Method.

ii) C.B.R ( California Bearing Ratio) method.

10 M

2 (b)
The speed of overtaking and overtaken vehicles are 60 kmph and 30kmph respectively, on a two- way traffic road.

If the acceleration of overtaking vehicle is 0.99 m/sec

ii) Minimum Length of Overtaking Zone.

iii) Draw a neat sketch of Overtaking Zone.

If the acceleration of overtaking vehicle is 0.99 m/sec

^{2}, findii) Minimum Length of Overtaking Zone.

iii) Draw a neat sketch of Overtaking Zone.

10 M

3 (a)
Explain importance of Highway maintenance.

6 M

3 (b)
Discuss various types of failures in Flexible and Rigid Pavements with all the sketches.

7 M

3 (c)
Explain about the application of Geotextiles and geogrid in Highway Pavements.

7 M

Explain the following.

4 (a)
30

^{th}Highest Hourly Volume.
5 M

4 (b)
Methods of pavement Evaluation.

5 M

4 (c)
PIEV theory.

5 M

4 (d)
Differentiate between Bitumen and tar.

5 M

5 (a)
A National Highway is passing through a rolling terrain, has a horizontal curve of radius of 500 m. Design length of transition curve assuming suitable data.

10 M

5 (b)
Calculate the super-elevation to be provided for a Horizontal curve of radius 400 m. For a design speed of 100 kmph in a plain terrain. What will be the maximum design speed permissible if the super-elevation is restricted to 0.07. Assume co-efficient of lateral friction as 0.15.

10 M

Explain the following.

6 (a)
Soil-stabilization methods.

5 M

6 (b)
Afflux and its calculation.

5 M

6 (c)
Benkalman Bearn Method.

5 M

6 (d)
Road Markings.

5 M

7 (a)
Write detailed notes on all the traffic surveys conducted, with neat diagrams.

10 M

7 (b)
Explain about 'Highway Drainage' with neat sketches.

6 M

7 (c)
Design of Rigid Pavements with steps involved.

4 M

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