**GTU previous question papers**

**GUJARAT TECHNOLOGICAL UNIVERSITY**

**B. E. Sem. – V – Examination – June- 2011**

**Subject code: 150601**

**Subject Name: Highway Engineering**

**Instructions:**

**1. Attempt all questions.**

**2. Make suitable assumptions wherever necessary.**

**3. Figures to the right indicate full marks.**

**Q.1 (a) **Discuss about various road authorities working in highway planning and development in India.

**(b) **Discuss about maintenance of highway along with failures of flexible and rigid pavements.

**Q.2 (a) **Discuss about various engineering surveys to be carried out before a

highway alignment is finalized in highway project.

**(b) **Enlist various components of highway. Sketch cross section of divided highway in urban area.

** ****OR**

**(b) **The speed of overtaking and overtaken vehicles is 80 kmph and 50 kmph

respectively on a two way traffic road. The acceleration of overtaking

vehicle is 0.99 m/sec2 .Calculate Safe overtaking sight distance and

minimum length of overtaking zone. Also draw sketch of overtaking zone

and show the positions of sign posts.

** ****Q.3 (a) **Enlist the types of horizontal and vertical curves.

Calculate the extra widening required for a two lane pavement on a

horizontal curve of radius 240m.

The longest wheel base of vehicle expected on the road is 7.0m.

Design speed is 60 kmph.

**(b) **(i)Write physical and engineering properties of road aggregates. ** **

(ii) Find out CBR value for soil subgrade for 1200 ADT of commercial

vehicle .Annual growth rate of traffic is 8%.Construction period is 3 years.

Loads at 2.5 mm and 5.0 mm penetration are 55 and 78 kg respectively. Also find out number of vehicles per day for design.

**OR**

**Q.3 (a) **Evaluate wheel load stresses for a 18 cm thick cement concrete pavement.

Wheel load is 5100 kg.

Poisson’s ratio of concrete is 0.15.

Radius of contact area is 15 cm.

Modulus of elasticity of cement concrete is 3.00 x 105 kg/cm2 .

Modulus of subgrade reaction is 6.0 kg/cm3 .

** ****(b) **( i ) Write about empirical method-Group Index for pavement design. ** **

( ii ) Calculate superelevation required for a horizontal circular curve of

radius 97 m. The design speed is 60 kmph and design coefficient of lateral friction is 0.15.

**Q.4 (a) **( i )Write about design of filter material in highway drainage. ** **

( ii ) Role of arboriculture in aesthetics value of highway. ** **

**(b) **( i ) Explain the terms: Skid and Slip. ** **

( ii ) Write in brief about low cost and high cost roads. ** **

**OR**

**Q.4 (a) **( i ) What is PPP models? ** **

( ii ) State elementary principles of alignment in hilly areas. ** **

**(b) **( i ) What are the methods of highway financing? ** **

( ii )Write recommended values of Camber and Right of way. ** **

**Q.5 (a) **( i ) What is roaduser characteristics? ** **

( ii )Write causes of accident. ** **

**(b) **Discuss about various traffic control devices. ** **

**OR**

**Q.5 (a) **Sketch various types of intersection. Which types of movements are

observed at an intersection? Write design criteria for intersection.

** ****(b) **( i ) Draw relationship between flow, speed and density. ** **

( ii ) what is off street parking? ** **