IRC SP 020: Rural Roads Manual

383 Pages·2015·24.22 MB·English

by  Indian Roads Congress

RURAL ROADS
MANUAL
NEW
DELHI
2002

Indian Roads Congress
Special Publication 20
RURAL ROADS
MANUAL
Published by
THE INDIAN ROADS CONGRESS
Copies can be hadfrom
The Secretary General, Indian Roads Congress
Jamnagar House, Shahjahan Road
New Delhi-110011
NEW DELHI 2002
Price Rs. 1000/-
(plus packing and postage)
1
IRC:SP:20-2002
First Published June. 1979 [as Manual on Route Locations, Design, Construction
:
and Maintenance ofRural Roads (other District Roads
and Village Roads)]
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Reprinted March, 2003
Reprinted November, 2004
Reprinted July. 2006
Reprinted June, 2007 (Amendment Dated 3 1-12-2006)
Reprinted September, 2007
Reprinted August, 2008
Reprinted June, 2009
Reprinted June, 2010
Reprinted August, 201
1
Reprinted July, 2012
Reprinted June, 2013
(The Rights ofPublication and ofTranslation are reserved)
Printed at : India Offset Press, A-1, Mayapuri Industrial Area, Phase-I, New Delhi
(1000 copies)
igitized by the Internet Archive
2014
in
https ://arch ve org/detai Is/govlawi rcy2002sp20
i .

9
IRC:SP:20-2002
CONTENTS
Page
Personnel ofHighways Specifications & Standards Committee (i) & (ii)
List ofSymbols and Abbreviation (ni) t0 (v)
INTRODUCTION
1
SCOPE 6
CHAPTER PLANNING AND ALIGNMENT
1
1.1. Planning ofRural Road
1.2. Planning Database 7
Concept ofNetwork Planning 8
1.3.
1.4. Rural Roads Plan 10
Road Alignment and Surveys 12
1.5.
1.6. Governing Factors for Route Selection 13
1.7. Factors Controlling Alignment 13
1.8. Special Considerations for Hill Roads 15
1.9. Special Considerations ii, Sand Dune Areas 16
1.10. Surveys 16
1.11. Detailed Project Report 1
Appendix-1 1 Habitation Data (Format-I) 21
.
Appendix-1.2 Instructions for Filling Format-I 22
Appendix-].3 Inventory ofRural Roads (Format-II) 23
Appendix-1.4 Instructions for Filling Format-II 24
Appendix-J.5 Record ofPrimary and Secondary Roads (Format-Ill) 25
Appendix-].6 Legend/Colour Codes for Preparation ofMap 26
Appendix-]. 7 Coding for Habitation 27
CHAPTER 2 GEOMETRIC DESIGN STANDARDS 28
2.1. Introduction 28
2.2. Classification ofRural Roads 28
2.3. Terrain Classification 28
2.4. Design Speed 29
2.5. Basic Principles ofGeometric Design 29
2.6. Cross-Sectional Element 29
2.7. Roadway Width at Cross-Drainage Structures 34
2.8 Camber 35
2.9. Sight Distances 35
2.10. Horizontal Alignment 36
2.11. Vertical Alignment 40
2.12. Alignment Compatibility 43
2.13. Hair-Pm Bends 43
2.14. Passing Places 43
2.15. Lateral and Vertical Clearance 43
2.16. Traffic Engineering Requirement 43
1
IRC:SP:20-2002
CHAPTER CLIMATE AND ENVIRONMENT 45
3
45
3.1. Introduction
3.2. Rainfall and Temperature Variation 45
3.3. Climatic Aspects 48
3.4. Environmental Issues 51
3.5. Erosion Control 53
3.6. Special Techniques 54
CHAPTER 4 ROAD MATERIALS 56
4.1. Introduction 56
4.2. Soil and Material Surveys 56
4.3. Soil and Marginal Materials 62
4.4. Embankment and Subgrade Materials 69
4.5. Stabilised Soils 70
4.6. Road Aggregates 72
4.7. Aggregate for Base Course 75
4.8. New Materials and Stabilisers 77
4.9. Materials for Desert Areas 78
4.10. Materials for Bituminous Construction 79
4.1 Materials for Bituminous Surfacing 82
1 .
4.12. Materials for Semi-Rigid Pavement 85
4.1 3. Materials for Rigid Pavement 86
4.14. Materials for Special Pavements 89
115. Climatic Suitability ofConcrete Materials 90
Appendix-4.1 Mechanical Stabilization 92
CHAPTER 5 PAVEMENT DESIGN 94
5.1. Introduction 94
5.2. Design Parameters 95
5.3. Pavement Components 96
5.4. Design ofFlexible Pavement 97
5.5. Design ofSemi-Rigid Pavement 102
5.6. Design ofRigid Pavement 104
5.7. Design ofSpecial Pavements 105
5.8. Drainage and Shoulders 107
Appendix-5.J Worked Out Example ofRoller Compacted Concrete Pavement 108
CHAPTER ROAD DRAINAGE
6 110
6.1. Introduction 110
6.2. Types ofRoad Drainage 110
6.3. General Criteria for Road Drainage 10
1
6.4. System ofDrainage 111
6.5. Surface Drainage System
1 1
6.6. Sub-Surface Dram 119