1 of 13

Civil Engineering Department

TRANSPORTATION ENGINEERING (3150611)

HILL ROAD

Prepared by

Nirav P Desai

Assistant Professor

Civil Engineering Department

2 of 13

HILL ROAD

Civil Engineering Department R.N.G.Patel Institute of Technology, Bardoli Mr. Nirav P Desai

Scope of study

​

Elementary principle in alignment in hilly area and drainage.

3 of 13

Civil Engineering Department R.N.G.Patel Institute of Technology, Bardoli Mr. Nirav P Desai

4 of 13

2 HILL ROAD

Civil Engineering Department R.N.G.Patel Institute of Technology, Bardoli Mr. Nirav P Desai

Question asked in GTU from this topic

1) Explain elementary principle of alignment in hilly areas.

5 of 13

HILL ROAD –

Civil Engineering Department R.N.G.Patel Institute of Technology, Bardoli Mr. Nirav P Desai

  • Classified based on terrain.
  • Roads located in terrain having Cross slope of 25% or more considered Hill road or Ghat road

Sr. No

Type of terrain

Cross slope

1

Plain or Level terrain

0 to 10 %

2

Rolling terrain

10 to 25

3

Mountainous

25 to 60

4

Steep

Above 60

6 of 13

Civil Engineering Department R.N.G.Patel Institute of Technology, Bardoli Mr. Nirav P Desai

HILL ROAD

​

  • Characteristics
  • Cross slope of 25% or more
  • Widely differing elevation
  • Steep slope
  • Great number of water courses.

7 of 13

Civil Engineering Department R.N.G.Patel Institute of Technology, Bardoli Mr. Nirav P Desai

HILL ROAD

  • Our objectives
  • Shortest route
  • Safe route
  • Economy
  • Less VOC ( Vehicle operating cost)
  • Less maintenance.

8 of 13

Problems with Hill Road

Civil Engineering Department R.N.G.Patel Institute of Technology, Bardoli Mr. Nirav P Desai

  • Alignment
  • Stability.
  • Soil erosion
  • Land slides
  • Maintenance.
  • Drainage.
  • Snow fall

9 of 13

Importance of Hill Road

Civil Engineering Department R.N.G.Patel Institute of Technology, Bardoli Mr. Nirav P Desai

  • Economic development.
  • Industrial development
  • Forest wealth.
  • Strategic consideration.
  • Tourism

10 of 13

Elementary Principles of Alignment in Hilly area

Civil Engineering Department R.N.G.Patel Institute of Technology, Bardoli Mr. Nirav P Desai

Features of Good alignment for Ghat road

  1. Minimum cost
  2. Comfortable travel
  3. Lower VOC
  4. Stable and safe road.
  5. Sharp curve with small radius.
  6. Easy gradients.
  7. Minimum cutting and filling.
  8. Minimum walling and bridging.

11 of 13

Elementary Principles of Alignment in Hilly area

Civil Engineering Department R.N.G.Patel Institute of Technology, Bardoli Mr. Nirav P Desai

Principles for Ghat road at a glance

  1. Stability. ( Common problem land slide)
  2. Drainage. ( Minimum C.D. works)
  3. Geometric standards of Hill Road.
  4. Resisting length. ( as low as possible)
    • Ineffective rise -minimum
    • Excessive fall.-minimum

12 of 13

Elementary Principles of Alignment in Hilly area

Civil Engineering Department R.N.G.Patel Institute of Technology, Bardoli Mr. Nirav P Desai

13 of 13

Thank you

Civil Engineering Department R.N.G.Patel Institute of Technology, Bardoli Mr. Nirav P Desai