## Transportation Engineering 1 - Jun 19

### Civil Engineering (Semester 5)

Total marks: 80

Total time: 3 Hours
INSTRUCTIONS

(1) Question 1 is compulsory.

(2) Attempt any **three** from the remaining questions.

(3) Draw neat diagrams wherever necessary.

**1.a.**Discuss on the Role of IRC, MORTH and CRRI

**1.b.**Compare Bitumen, Tar and Asphalt

**1.c.**What is L.O.S? explain various L.O.S.

**1.d.**The value of characteristic deflection is 2.35 mm, find the corrected Characteristic value if temperature of pavement during test was 290C and Moisture correction factor is 1.2

**1.e.**Find vehicle damage factor for:

a. Bike with 2 Occupants

b. Car with 4 Occupants

c. LCV with rear axle load of 2 tons

d. HCV with rear axle load of 15 tons

**2.a.**Determine Median & Modal Speed for the following data. Also determine the design speed, upper limit & lower limit speed

Speed Range (KMPH) | Frequency (Qi) |
---|---|

0-8 | 0 |

8-16 | 8 |

16-24 | 12 |

24-30 | 21 |

30-36 | 29 |

36-42 | 35 |

42-48 | 28 |

48-54 | 11 |

54-60 | 0 |

**2.b.**Discuss in detail on desirable properties of pavement materials

**2.c.**Compare the following

i. AADT and ADT

ii. Journey Speed and Running Speed

iii. Space headway and Time headway

**3.a.**What is Lane distribution factor? Give its value. Also determine Million Standard Axle for divided road having 3 lanes with initial traffic 600 cvpd during start of construction. Rate of growth is 7.5 %, VDF is 2.5, CBR is 4 %, construction period is 2 years & design life is 15 years

**3.b.**Two cars are travelling at 35 kmph on a road with coefficient of friction 0.2. Driver of car 1 has reaction time 2.5 sec and driver of car 2 has 2.0 sec. If in case both cars stop at same distance from first seeing obstacle, determine break efficiency of car 1, if that of car 2 is 0.3.

**3.c.**Explain Construction procedure of Cement concrete pavement in details

**4.a.**Derive the equation for Overtaking Sight Distance. Also draw sketch of overtaking zone if the speed of vehicle is 65 KMPH.

**4.b.**Compare rigid, flexible and WBM pavement on the basis of suitability, Binding material used, load distribution, value of camber and maintenance required

**4.c.**Design a tie bar for pavement width 3.5 m & thickness of pavement 26 cm. Assume value of f = 1.2

**5.a.**Design Super-elevation for a curve having radius 500 m & speed is 100 kmph. Also find the amount of super-elevation to be given if it is a 2-lane road

**5.b.**Find out the warping stress of 25 cm thick CC pavement with transverse joint at 5 m & longitudinal joints at 3.6 m interval. Take k = 6.9 kg/cm3, a = 15 cm, temperature difference is 0.6C /cm slab thickness in day. Take E = 3 x 105 kg/cm2, e = 10 x 10-6/C, Radius of relative stiffness = 87.2 cm

**5.c.**Discuss on various rigid pavement failures

**6.a.**Write short notes on

i. Setback distance

ii. Highway drainage

iii. Rotary Island

iv. Bitumen stabilization

**6.b.**Answer the following

i. What is meant by Abrasion Charges?

ii. Discuss on Golden Quadrangle project.

iii. Define Flaky and Elongated Aggregates