Code No: RR320106 Set No.

1
III B.Tech II Semester Supplementary Examinations, Aug/Sep 2007
TRANSPORTATION ENGINEERING
(Civil Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
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1. (a) What are obligatory points? How do they affect road alignment? Explain by
giving suitable sketches wherever needed.
(b) Explain briefly the modified classification of road system in India as per the
Third twenty year road development plan, 1981-2001. [8+8]

2. (a) State the objects of widening pavements on horizontal curves ? What are the
factors on which the design of widening depends ? Explain.
(b) The speed of overtaking and over taken vehicles are 100 kmph and 80 kmph
respectively. If the acceleration of the of the overtaking vehicle is 2.5 kmph
per second. Calculate the safe passing sight distance for two way traffic. [8+8]

3. (a) Explain how the speed and delay studies are carried out. What are the various
uses of speed and delay studies.
(b) What are the applications of location file, spot maps, collision diagrams and
condition diagrams? [8+8]

4. (a) What is at-grade intersection? Explain various types of round abouts or ro-
taries.
(b) What are the advantages and disadvantages of rotaries? [8+8]

5. (a) Explain the procedure of designing a bituminous pavement by IRC method.

(b) Explain the importance of maintenance of roads. Discuss the problem that
can be expected due to inadequate maintenance in case of flexible pavement.
[8+8]

6. (a) What are the functions of rails? Name various types of rails in use. Which
one is widely used? How is the weight of rail section usually determined?
(b) List the various types of sleepers used in Indian Railways. Describe briefly
the mono block prestressed concrete sleepers. What are the reasons for its
ever-increasing adoptions world over? [8+8]

7. (a) Define Interlocking and explain the principle of interlocking. Describe the
various mechanical devices used for Interlocking.
(b) What do you understand by ?Negative superelevation?? When from layout
of a B.G. yard, a 80 curve branches off from a 40 main curve in an opposite
direction. If speed is restricted to 28.95 kmph and permissible value of cant
deficiency is 7.61 cm, determine the speed restriction on the main line. [8+8]

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Code No: RR320106 Set No. 1
8. What is meant by the basic runway length? Discuss the three cases to be considered.
[16]

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Code No: RR320106 Set No. 2
III B.Tech II Semester Supplementary Examinations, Aug/Sep 2007
TRANSPORTATION ENGINEERING
(Civil Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
⋆⋆⋆⋆⋆

1. (a) Describe the classification of rural highways adopted in India.

(b) What are the requirements of a good highway alignment ? What factors
influence the alignment of highways? Explain. [8+8]

2. (a) Define road gradient and mention its various types. Explain briefly.
(b) Calculate the super elevation is a road curve of 120 m radius with vehicle
traveling at 96 kmph. The width of the road in 15 m and coefficient of friction
is 0.12. [8+8]

3. (a) Discuss the various traffic studies and their importance.

(b) Explain various measures that may be taken to prevent accidents. [8+8]

4. (a) What are the design elements associated with a rotary intersection? What are
the design specifications? Explain.
(b) What situations justify the requirements of grade separated intersection? [8+8]

5. What are the various factors to be considered in the pavement design? Discuss the
significance of each. [16]

6. (a) Make roughly dimensioned sketch of flat-footed rails. What are the causes
hogging of rail ends? How are hogged rails dealt with.
(b) Mention the required properties of a good ballast for a railway track. [8+8]

7. (a) Explain the concept of interlocking and its objectives. Also discuss the prin-
ciples of interlocking.
(b) Explain the necessity of gradients. Discuss all the types of gradients giving
their permissible values adopted on Indian Railways. [8+8]

8. (a) Explain briefly the various factors which affect the layout of taxiway.
(b) Draw a neat cross-section of a main runway for an international airport and
show on the sketch all the geometric design features. [8+8]

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Code No: RR320106 Set No. 3
III B.Tech II Semester Supplementary Examinations, Aug/Sep 2007
TRANSPORTATION ENGINEERING
(Civil Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
⋆⋆⋆⋆⋆

1. (a) What are the significant recommendations of Jayakar committee report? Men-
tion how this helped in road development in India.
(b) What kind of Engineering surveys are required for the alignment of highways?
Explain. [8+8]

2. (a) Define road gradient and mention its various types. Explain briefly.
(b) Calculate the super elevation is a road curve of 120 m radius with vehicle
traveling at 96 kmph. The width of the road in 15 m and coefficient of friction
is 0.12. [8+8]

3. (a) Explain origin and destination study. What are the various uses of O & D
studies? Explain.
(b) What are the various types of traffic accidents ? Discuss the method of
analysing the speed of vehicles involved in the accident. [8+8]

4. (a) What is at-grade intersection? Explain various types of round abouts or ro-
taries.
(b) What are the advantages and disadvantages of rotaries? [8+8]

5. What are the various factors to be considered in the pavement design? Discuss the
significance of each. [16]

6. (a) Explain the type of gradients adopted in the geometric design of railway track.
(b) What is meant by wear of rails? Categorise types of rail wear and enumerate
the methods by which wear in rails can be measured. [8+8]

7. (a) What do you understand by equilibrium superelevation ? Describe thumb rule

for calculating superelevation in the field.
(b) Mention the objects of signaling. How are the signals classified? Mention the
functions of each of the above signals. [8+8]

8. What is a wind rose diagram? What is its utility? What are its types? Explain
each type. [16]

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Code No: RR320106 Set No. 4
III B.Tech II Semester Supplementary Examinations, Aug/Sep 2007
TRANSPORTATION ENGINEERING
(Civil Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
⋆⋆⋆⋆⋆

1. (a) State the significance of Nagpur plan evolved in 1943?

(b) Discuss the general principles that control the highway alignment. [8+8]

2. (a) What are the general controls to be kept in view in determining the horizontal
alignment of road.
(b) A highway of width 7.5 m radius 150 m with a speed of 120 kmph and the
length of the wheel base 7.0 m. Find the extra widening required. [8+8]
3. (a) Explain how the speed and delay studies are carried out. What are the various
uses of speed and delay studies.
(b) What are the applications of location file, spot maps, collision diagrams and
condition diagrams? [8+8]

4. (a) What is the main concept of rotary intersection? Give the advantages and
disadvantages of rotary intersection.
(b) Explain with suitable diagram how traffic islands can be effectively used at
intersection to improve and regulate the traffic flow. [8+8]
5. (a) Explain the method of flexible pavement design by Group Index method.
(b) Describe the construction procedure of Cement concrete pavements both by
alternative bay method and continuous bay method. [8+8]

6. (a) Categorise types of rail wear and enumerate the methods by which wear in
rails can be measured.
(b) What are the functions of ballast in a railway track? Explain. [8+8]
7. (a) When negative superelevation is required in the geometric design of a railway
track? Explain.
(b) Explain the necessity of grade compensation at curves. The ruling gradient
has been fixed as 1 in 200 on a section of B.G. track. What should be the
compensated gradient when a 40 horizontal curve is also to be introduced on
this ruling gradient? [8+8]

8. What is meant by the basic runway length? Discuss the three cases to be considered.
[16]

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