Transportation Engineering - B.Tech 5th Semester Examination, 2020

2020•Semester 3•Civil-CA•End Semester
Aryabhatta Knowledge University, Patna
B.Tech 5th Semester Examination, 2020

Transportation Engineering

Time: 03 HoursCode: 101507Full Marks: 70

Instructions:

  1. The marks are indicated in the right-hand margin.
  2. There are NINE questions in this paper.
  3. Attempt FIVE questions in all.
  4. Question No. 1 is compulsory.
Q.1 Choose the correct option from the following (any seven):[14]

  1. Minimum of 8 m width and 2 m wide shoulders on the following roads are recommended

    1. EH and NH
    2. NH and SH
    3. EH, NH and SH
    4. MDR

  2. Which of the following statements is correct? According to the principle of road alignment

    1. it should be straight.
    2. its gradient should be easy.
    3. it should aim avoiding deep cuttings and fillings.
    4. All of the above

  3. In the final survey, the centreline stakes are driven at ___ interval in hilly terrain.

    1. 10 m
    2. 20 m
    3. 30 m
    4. 50 m

  4. The portion of the roadway between outer edges of carriageway and drains in case of cuttings is known as

    1. kerb
    2. shoulder
    3. formation width
    4. right of way

  5. Maximum camber recommended by IRC is

    1. 1.7%
    2. 2%
    3. 3%
    4. 4%

  6. For highways, width of the formation in plain area is

    1. 18 m
    2. 15 m
    3. 12 m
    4. 9 m

  7. In steep terrain, ruling gradient is limited to

    1. 1 in 25
    2. 1 in 20
    3. 1 in 17
    4. 1 in 12.5

  8. For finding stopping distance of a vehicle, the height of line of sight of driver and height of line of obstacle on road are taken as ___ respectively.

    1. 1.2 m and 0.15 m
    2. 1.5 m and 0.5 m
    3. 1.2 m and 0.5 m
    4. 1.5 m and 0.15 m

  9. When a vehicle traces a horizontal curve, it is subjected to centrifugal force in ___ direction.

    1. inward
    2. outward
    3. forward
    4. backward

  10. For designing highways, IRC recommends the coefficient of friction as

    1. 0.15
    2. 0.18
    3. 0.21
    4. 0.24
Q.2 Solve both questions :[14]

  1. Outline and discuss the scope of the highway engineering study.

  2. Briefly discuss the historical development of road construction.

Q.3 Solve this question :[14]

  1. There are five alternative proposals of road plans for a backward district. The details are given below. Justify with reasons, which proposal is the best, assuming utility unit of 0.5, 1.0, 2, 4 and 8 for the five population ranges and 1.0 and 5 per 1000 t of agricultural and industrial products served:

    Proposal Total length (km) Number of towns and villages served with population range Productivity (in Thousand tonnes)
    <2000 2001-5000 5001-10000 10001-20000 >20000 Agricultural Industrial
    P 500 100 150 20 40 3 150 20
    Q 600 200 250 68 28 3 220 25
    R 700 270 350 82 36 4 300 35
    S 800 280 410 91 41 4 400 42
    T 900 290 430 96 44 4 430 45
Q.4 Solve both questions :[14]

  1. What are the various requirements of an ideal highway alignment? Explain briefly.

  2. Discuss the general principles in the re-alignment of a highway and explain how the work is carried out.

Q.5 Solve this question :[14]

  1. A national highway passing through a rolling terrain in heavy rainfall area has a horizontal curve of radius 500 m. Design the length of transition curve, assuming suitable data.

Q.6 Solve both questions :[14]

  1. State the factor on which the overtaking sight depends. Explain briefly.

  2. State the objects of widening pavements on horizontal curve. What are the factors on which the design of widening depends? Explain.

Q.7 Solve this question :[14]

  1. The 15-minute traffic counts on crossroads 1 and 2 during peak hour are observed as 178 and 142 vehicles per lane respectively, approaching the intersection in the direction of heavier traffic flow. If the amber time required are 3 and 2 seconds respectively for load based approach speed, design the signal timings by trial cycle method. Assume an average time headway of 2.5 seconds during green phase.

Q.8 Solve both questions :[14]

  1. Explain briefly the modified Hubbard Field method of bituminous mix design.

  2. Explain the desirable properties of aggregate to be used in different types of pavement construction.

Q.9 Solve both questions :[14]

  1. Write down the construction steps for water bound macadam road.

  2. With the aid of neat sketches, show the different types of joint and their positions.