1 (a)
What are the social effects of transportation?

6 M

1 (b)
What are the advantages and disadvantages of airways?

6 M

1 (c)
What are the objectives of IRC and Central Roads Research Institute?

8 M

2 (a)
With sketches indicate different road patterns.

6 M

2 (b)
Indicate the details to be collected in: i) Traffic surveys ii) Engineering surveys, While planning a highway.

6 M

2 (c)
The area of district is 8400km

^{3}, There are 9 towns with population greater than 5000. Calculate the length of NH, SH, MDR, ODR+VR as par 3rd 20 year road plan.
8 M

3 (a)
Briefly explain how map study is helpful in the alignment of new highway.

6 M

3 (b)
The width of pavement is 7.5m and parabolic camber of 1 in 40 is to provided. Design the parabolic profile of the pavement surface.

6 M

3 (c)
A vehicle is moving at 55kmph on a single lane pavement of width 4mts on level surface. The reaction time is 2.3 secs and coefficient of longitudinal friction is 0.39. Determine the intermediate sight distance.

8 M

4 (a)
Design the length of transition curve for a speed of 65 kmph on a 2-lane highway with a width of 7.0 mts. The radius of the curve o the curve is 220mts. The super elevation is provided by raising the outer edge with respect to inner edge. The rate of raising the outer edge is 1 in 150 in open country. The wheel base is 6.1 mts.

12 M

4 (b)
An up gradient of 1 in 18 meets another up-gradient of 1 in 48. Design the length of the vertical curve to be provided for a SSD of 70 mts. Mention the type of curve provided.

8 M

5 (a)
The CBR test results are as follows:

Apply correction and determine the CBR value of the soil.

Apply correction and determine the CBR value of the soil.

Load in kgs |
0 | 2 | 4 | 9 | 20 | 34 | 49 | 74 | 92 | 118 | 125 |

Penetration in mm |
0 | 0.5 | 1 | 1.5 | 2 | 2.5 | 3 | 4 | 5 | 7.5 | 10 |

8 M

5 (b)
The result of soil test is as follows:

Determine the Group Index and classify the soil as per HRB system. Discuss its suitability as subgrade material.

Determine the Group Index and classify the soil as per HRB system. Discuss its suitability as subgrade material.

Sieve size 0.074 mm |
% age passing is 45% |

Liquid Limit | 38 % |

Plastic Limit | 27 % |

8 M

5 (c)
Define cut back bitumen. What is SC, MC and RC cutback bitumen?

4 M

6 (a)
Design the bituminous pavement with the following data:

4-lane divided carriageway.

Traffic in each direction= 5600 CVD; Design life=9 yrs; CBR=5%;

Traffic growth rate= 8%; Vehicle damage factor = 4.5; Distribution factor = 0.75. Indicate pavement composition. Also, after 4 years determine the thickness of DBM and BC to be laid.

4-lane divided carriageway.

Traffic in each direction= 5600 CVD; Design life=9 yrs; CBR=5%;

Traffic growth rate= 8%; Vehicle damage factor = 4.5; Distribution factor = 0.75. Indicate pavement composition. Also, after 4 years determine the thickness of DBM and BC to be laid.

10 M

6 (b)
Determine warping stress at interior, edge and corner region for the following data.

Slab thickness= 25 cm; Slab size=3.6×11m; Modulus of subgrade reaction=6.9 kg/cm

Slab thickness= 25 cm; Slab size=3.6×11m; Modulus of subgrade reaction=6.9 kg/cm

^{3}; Temperature differential = 0.6°C per cm; Radius of area of contact, a=15 cm; e=10×10^{-6}/°C; E=3×10^{5}kg/cm^{2}; μ=0.15.
10 M

7 (a)
Mention the specification of materials and construction procedure for Wet Mix Macadam.

8 M

7 (b)
What are the requirement of highway drainage system?

4 M

7 (c)
The sieve analysis of subgrade soil is as follows:

Size of perforation in drain pipe=2.5mm. Design the filter material for

i) Permeability condition ii) Prevent piping condition.

Size of perforation in drain pipe=2.5mm. Design the filter material for

i) Permeability condition ii) Prevent piping condition.

Sieve size mm |
4 | 2 | 1 | 600μmm | 300μmm | 150μm | 75μm |

% age passing |
100 | 88 | 70 | 52 | 25 | 10 | 5 |

8 M

8 (a)
Mention factors affecting vehicle operation cost dependent on time.

4 M

8 (b)
Analyse the economics by Benefit - Cost Ratio method for proposal A, B and C.

A | B | C | |

Highway cost |
1, 76, 527 | 3, 81, 900 | 3, 75, 100, |

Road user cost |
32, 57, 857 | 28, 73, 025 | 27, 52, 345 |

6 M

8 (c)
Calculate the Annual cost a stretch of highway

Maintenance cost is Rs 12 lakh per year.

Take 1: Pavement design catalogue for traffic range 10-150 msa

Table 2: Values of coefficient C

Particulars |
Cost in lakhs |
Life in years |
Rate of S. int % |

Right of way | 140 | 100 | 7 |

Earth work | 90 | 40 | 8 |

Bridges | 85 | 70 | 8 |

Pavement | 160 | 12 | 9 |

Maintenance cost is Rs 12 lakh per year.

Take 1: Pavement design catalogue for traffic range 10-150 msa

CBR 5% |
||||

Cumulative Traffic msa |
Total Pavementthickness mm |
Pavement composition |
||

Bituminous surface |
Granular base and sub base mm |
|||

BCmm |
DBMmm |
|||

10 | 660 | 40 | 70 |
Base= 250 SubBase=300 |

20 | 690 | 40 | 100 | |

30 | 710 | 40 | 120 | |

50 | 730 | 40 | 140 | |

100 | 750 | 50 | 150 | |

150 | 770 | 50 | 170 |

Table 2: Values of coefficient C

L_{x}/l or L_{y}/l |
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 & >12 |

C_{x} or C_{y} |
0 | 0.04 | 0.175 | 0.44 | 0.72 | 0.92 | 1.03 | 1.075 | 1.08 | 1.075 | 1.05 | 1.03 |

10 M

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