Transportation Engineering - 2 - May 2014

MU Civil Engineering (Semester 6)

Total marks: --
Total time: -- INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary 1 (a) Describe the formula used for economic span of a Bridge starting assumptions made. 6 marks

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

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. 6 marks

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. 6 marks

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/sec², find
ii) Minimum Length of Overtaking Zone.
iii) Draw a neat sketch of Overtaking Zone. 6 marks

3 (a) Explain importance of Highway maintenance. 6 marks

3 (b) Discuss various types of failures in Flexible and Rigid Pavements with all the sketches. 6 marks

3 (c) Explain about the application of Geotextiles and geogrid in Highway Pavements. 6 marks

Explain the following.

4 (b) Methods of pavement Evaluation. 6 marks

4 (c) PIEV theory. 6 marks

4 (d) Differentiate between Bitumen and tar. 6 marks

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. 6 marks

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. 6 marks

Explain the following.

6 (b) Afflux and its calculation. 6 marks

6 (c) Benkalman Bearn Method. 6 marks

6 (d) Road Markings. 6 marks

7 (a) Write detailed notes on all the traffic surveys conducted, with neat diagrams. 6 marks

7 (b) Explain about 'Highway Drainage' with neat sketches. 6 marks

7 (c) Design of Rigid Pavements with steps involved. 6 marks