(SEM V) THEORY EXAMINATION 2017-18 TRANSPORTATION ENGINEERING-I

Transportation Engineering–I (NCE-502)

Section-Wise Important Questions & Study Notes

SECTION–A

(Attempt all questions | 2 × 10 = 20)
This section checks definitions, short notes, and basic concepts.
Write 2–3 lines only for each answer.

Typical Cross-Section of Macadam Construction
Macadam road consists of compacted layers of broken stones with proper camber, shoulders, and drainage for strength and durability.

Indian Roads Congress (IRC)
IRC is the apex body that formulates standards, specifications, and guidelines for road construction and traffic engineering in India.

Kerbs and Shoulders
Kerbs separate carriageway from footpath, while shoulders provide lateral support to pavement and space for emergency stopping.

Setback Distance
The minimum distance between the edge of the road and obstructions to ensure adequate sight distance.

Passenger Car Unit (PCU)
PCU converts heterogeneous traffic into equivalent passenger cars for traffic analysis.

Advantages & Disadvantages of Traffic Signals
Advantages: orderly traffic flow, reduced accidents.
Disadvantages: delay during low traffic, maintenance cost.

Kerb Marking and Object Marking
Kerb marking guides drivers at road edges; object marking highlights obstructions for safety.

Flash and Fire Point of Bitumen
Flash point is the temperature at which bitumen vapors ignite momentarily; fire point is when it burns continuously.

Expansion and Contraction Joints
Provided in cement concrete pavements to allow movement due to temperature changes.

Equivalent Single Wheel Load (ESWL)
A single wheel load that produces the same stress as a dual or multiple wheel load system.

SECTION–B

(Attempt any THREE | 10 × 3 = 30)
Numericals + theory. Show steps clearly.

1. Transition Curve Design (Numerical)

Given design speed, radius, rate of superelevation, and widening:

Calculate length of transition curve                     Calculate shift
Use IRC design criteria.

2. Highway Planning Surveys

Explain briefly:                                                         Map study

Reconnaissance survey                                            Preliminary survey

Final location survey

3. Westergaard’s Stress Analysis (Numerical)

Calculate stresses at:                                                Interior

Edge                                                                         Corner of CC pavement
Using given E, μ, slab thickness, wheel load, and radius of contact.

4. Road Patterns

Explain features of:                                                  Rectangular pattern

Radial pattern                                                          Radial & circular pattern

Star & grid pattern

5. Summit Curve Design (Numerical)

For given ascending and descending gradients:    Find length of summit curve

Based on stopping sight distance (SSD)

SECTION–C

(Attempt any ONE | 10 × 1 = 10)

3(a) Historical Development of Roads

Discuss:

Roman roads (features: camber, drainage, stone layers)

Difference between ancient and modern road construction

OR

3(b) Short Notes

Explain briefly:                                                Central Road Fund

Nagpur Road Plan                                          Star and Grid Pattern

Jayakar Committee