QUESTION BANK- CET 206: Transportation Engineering
MODULE 1
1. What are the special considerations to be taken while aligning roads on hilly areas?
2. What are the objectives of preliminary survey for highway alignment?
3. Enumerate the factors governing the width of carriage way. State the IRC specifications
for width of carriage way for various classes of roads.
4. While aligning a highway in a built up area, it was necessary to provide a horizontal
curve of radius 300 m for a design speed 65Km/hr, length of wheel base-6m and
pavement width 10.5m. Assume rate of introduction of super elevation as 1 in 100 and
super elevation is provided by rotating about centre line. Design super elevation, extra
widening of pavement and length of transition curve.
5. What are the points to be kept in view while selecting the alignment between two
terminal stations?
6. Explain briefly main features of Indian Road Congress.
7. Write a short note on Carriageway width?
8. Explain the role of kerb.
9. Why are overtaking Zones provided? Draw a neat sketch showing the signs to be
installed and their positions.
10. A valley curve is formed by a descending gradient of 1 in 40 which meets a ascending
gradient of 1in 30. Design the total length of valley curve if the design speed is 100 km/hr
so as to fulfill both comfort condition and head light sight distance requirements after
calculating stopping sight distance required. Assume rate of change of change of
centrifugal acceleration as 0.6m/sec3, reaction time 2.5 sec and coefficient of friction
0.35.
11. Write a short note on overturning effect.
12. Explain briefly the calculation of length of the transition curve.
13. Derive an expression of summit curve for SSD.
14. Write a short note on setting out of a transition curve.
15. While aligning a highway in a built up area, it was necessary to provide a horizontal circular
curve of radius 446 m. The design speed is 85 Kmph, the length of wheel base is 8m and the
pavement width is 12m. Design super elevation, extra widening and length of transition
curve.
16. What are the factors required for overturning sight distance?
17. How the total reaction time of the driver is measured?
18. Derive an expression for overtaking sight distance.
19. While aligning a hill road with a ruling gradient of 8 percent, a horizontal curve of radius
90m is encountered. Find the compensated gradient at the curve?
MODULE 2
1. The soil subgrade sample was obtained from the project site and the CBR tests conducted at
field density gave the following readings. Draw the load penetration curve and determine the
CBR value and find the total thickness of the pavement by CBR method as recommended by
IRC for commercial vehicles 1500 per day, with 7% growth rate. The pavement construction is
to be completed in three years after last traffic count. (Use design chart provided in the question
paper)
Penetration Load(Kg) Penetration Load
(mm) (mm) (Kg)
0 0 3 58
.5 55 4 70
1 16 5 77
1.5 30 7.5 89
2 42 10 100
2.5 50 12.5 110
CBR Design chart
2. Outline the IRC 37-2012 recommendations for determining the thickness of Flexible
pavements.
3. Explain with sketches the various types of failures and their causes in rigid pavements?
4. List out the desirable properties of aggregates to be used in pavement construction. Also
specify various tests for judging the suitability of aggregates.
5. Explain briefly desirable properties of road aggregates.
6. What are the variations in temperature that generally effect the pavement?
7. Discuss the advantages and limitations of CBR method of design. [8M]
8. Calculate the stresses at interior, edge and corner regions of CC pavement using Westergaard’s
stress equation. Use the following data: Wheel load= 5100 kg, modulus of elasticity is 3*10^5
kg/cm2, pavement thickness =18cm, Poisson’s ratio of concrete = 0.15, modulus of subgrade reaction
6 kg/cm3 and radius of contact area is 15cm.
MODULE 3
1. What is OD survey? List the methods of OD survey. Explain any one method in detail.
2. List out the various factors which affect the road user characteristics in traffic
engineering. What are the effects of road user characteristics in traffic performance?
3. What are the requirements of a good highway drainage system?
4. Enumerate AADT.
5. Explain spot speed, running sped, space mean speed, time mean speed and average speed.
How is spot speed studies carried out?
6. Discuss various traffic studies and their importance.
7. What are the advantages and disadvantages of traffic signs?
8. Write a short note on Mechanical counters in Traffic Volume Study
9. What are the basic requirements of Intersection at Grade?
10. What are the advantages and disadvantages of traffic signals? (5)
11. What is (i) Saturation flow, (ii) Lost time, and (iii) Phase in a signal design?
12. A fixed time 2-phase signal is to be provided at an intersection having four arms. The
design hour traffic and saturation flow are
North South East West
Design hour 800 400 750 600
flow(pcu/hr)
Saturation 2400 2000 3000 3000
flow(pcu/hr)
Time lost per phase due to starting delay is 2 sec and All red period is 4 sec. Design two phase
traffic signal using Webster’s method. Draw the phase diagram also.
5. Explain various types of road markings.
MODULE 4
1. List and define the component parts of a railway track
2. Explain the functions and requirements of rails
3. Enumerate the role of Indian railways in National development
4. With the help of a neat sketch, show the various components of a typical Railway track
5. Write about the engineering surveys to be performed for railway line construction.
6. Name the different modes of transportation. Enumerate the advantages and
disadvantagesof (i) Road and (ii) Rail transportation.
7. What is the equilibrium cant on a 20 curve on a BG track, if the speed of various trains
are 10 trains at 50kmph., 8 trains at 55 kmph. and 4 trains at 60kmph
8. Explain the various type of gradient used on railway track? What is grade compensation
and why is it necessary?
9. What are the factors affecting the selection of gauges?
10. What is Ballast? What are the different types and enumerate the requirements of Good
ballast.
11. Determine the number of sleepers required for the construction of 2000 m of BG track,
with a sleeper density of N + 7
12. What is a Transition curve, what are the different types and what are the requirements for
an ideal transition curve.
13. Explain the following terms (i) Tilting of Rails, (ii) Coning of Wheels. Draw neat
sketches, wherever necessary.
14. What are Sleepers? What are the advantages and disadvantages of Concrete sleepers?
15. List the various methods of tunneling in hard and soft rocks. Explain in detail any one
tunneling method employed in hard strata and soft soil
16. 2. Write notes on
(i) Lighting and Ventilation of tunnels
(ii) Lining of tunnels
17. 3. Write down the procedure for constructing a tunnel in clayey soil. Explain its
advantages
18. Why shore protection works are necessary? Explain common forms of shore protection
works
19. State the natural and meteorological phenomena a harbour engineer has to study and
briefly mention the effects of these phenomena
20. What are the various forces acting on breakwater?
21. Distinguish between (i) Wharf and Pier (ii) Transit shed and ware house
22. What are Navigational aids? Briefly describe the different types of Floating signals
23. Define the term Break waters. Enlist the different types.
24. Differentiate between a Jetty and a Wharf. State the conditions under which you will
prefer their construction.
25. Differentiate between Natural and Artificial harbours.
26. Define (i) Harbour, (ii) EIS, (iii) Off shore Moorings and (iv) Turning basin
MODULE 5
1. Explain with sketches the basic patterns of runway configurations.
2. Enumerate the various factors which would be kept in view while selecting suitable site for an
airport.
3. Describe the various markings on runways with sketches. (5)
4. What are the primary functions of air traffic control? (3)
5. The length of a runway under standard conditions is 1500m. The airport is to be provided at an
elevation of 110m above mean sea level. The airport reference temperature is 320C. Following
data refers to the proposed longitudinal section of runway. Determine the corrected length of
runway.
End to end of Grade(%) End to end of Grade(%)
runway(m) runway(m)
0 to 300 +1 1500 to 1800 +1
300 to 900 -.2 1800 to 2100 -.3
900 to 1500 +.5
