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GEOMETRIC DESIGN STANDARDS FOR RURAL (NON-URBAN) HIGHWAYS

IRC:73-1980 5 2 Normally\"rulingdesignspeed\'*shouldbetheguiding criterionforcorrelatingthevariousgeometricdesignfeatures \"Minimumdesignspeed\"mayhoweverbeadoptedinsections wheresiteconditionsincludingcostsdonotpermitadesignbased onthe\"rulingdesignspeed\" 5 3 Thedesignspeedshouldpreferablybeuniformalong

PDF	IRC 073: Geometric Design Standards for Rural (Non-Urban IRC : 73-1980 First Published : October 1980 Reprinted : June 1990 Reprinted : February 2000 Reprinted : December 2001 Reprinted : July 2004

PDF	IRC SP 008: Type Designs for Highway Kilometre Stones (Second IRC : 8 1980 TYPE DESIGNS FOR HIGHWAY KILOMETRE STONES (Second Revision) Published by IRC: 8-1980 below the Table This space is the distance measured

PDF	IRC SP 073: Manual of Standards and Specifications for Two Laning IRC::73- 1980 Geometric Design Standards for Rural (Non-Urban Highways) 10 IRC::80- 1981 Type Designs for Pick-up Bus Stops on Rural (i e Non-Urban)

PDF	IRC-73 1980 Geometric Design Standards for Rural (Non-Urban The Specifications and Standards Committee of the Indian Roads Congress had previously published a few Papers on geometric aspects of design The first Paper

PDF	IRC-73-1980 horizontal curves The first Paper entitled: "Horizontal and Transition Curves for Highways" appeared in the I R C Journal in 1947 This was followed by two other Papers on "

PDF	IRC-73-1980 IRC 73-1980 GEOMETRIC DESIGN STANDARDS FOR RURAL (NON-URBAN) HIGHWAYS Published by THE INDIAN ROADS CONGRESS Jamnagar House Shabjaban Road New Delhi-110011 1990 Price Rs (Plug Packing & IRC i 73-1m First published : October 1980 Reprinted : June 1990 Reprinted : February 2000 of

PDF	IRC:8-1980 IRC: 8 1980 TYPE DESIGNS FOR HIGHWAY KILOMETRE STONES (Second Revision) IRC: 8-1980 IRC:8-1980 First Published October 1960 Reprinted Second Edition

PDF	Law is the operating system of our society So show me the Director Central Road Research Institute Chief Engineer (Construction) Kerala Highways Research Station Madras IRC : n-mo

PDF	A brief history of the international rescue committee The IRC organised a large-scale programme of medical and childcare services educational support and placement assistance New crises erupt By 1980 it had

Sri Ramapuram, Bhimavaram-534202 (A.P.)

Director, Central Road Research Institute Chief Engineer (Construction), Kerala Highways Research Station, Madras IRC : n-mo law.resource.org

1.3. Following the adoption of metric system, ther^ was a

need to revise this publication with suitable modifications in the light of other standards brought out by the I.R.C. in the intervening period as also more recent practices round the world. To fulfil this need, a new draft was prepared in the I.R.C. Secretariat by L.R. Kadiyali and A.K. Bhattacharya. This was reviewed and modified by a Working Gro

2.3. The geometric features of a highway except cross-

sectional elements do not lend to stage construction. Geoiiietric defitciencies are costly and sometimes impossible to rectify later on due to the subsequent roadside development. Therefore, it is essential that geometric requirements should be kept in view right in the beginning. 3. CLASSIFICATION OF NON-URBAN ROADS law.resource.org

3.1. Non-urban roads in India are classified into five cate-

gories: National Highways State Highways Major District Roads (IV) Other District Roads (V) Village Roads **These should not be confused with Rural Roads which refer commonly to Other District Roads and Village Roads. While geometric design elements of Rural Roads are duly covered in this publication alongwith roads of higher category, more compreh

3.2. National Highways are main highways running through

the length and breadth of the country connecting major ports, foreign highways, State capitals, large industrial and tourist centres etc. law.resource.org

3.6. Village Roads are roads connecting villages or groups

of villages with each other and to the nearest road of a higher cate- gory. law.resource.org

S. No.

Terrain classification Per cent cross slope of the country law.resource.org

Speed

Perception and brake reaction Braking Safe stopping sight distance (metres) V (km/h) law.resource.org

Distance

(metres) Coefficient of longitu-dinal fric- Distance (metres) law.resource.org

8.5.1. Normally the attempt should be to provide overtaking

sight distance in as much length of the road as possible. Where this is not feasible, intermediate sight distance, which affords reasonable opportunities for overtaking, should be adopted as the next best alternative. In no case however should the visibility corres- pond to l^ss than the safe stopping distance which is the basic minimum for any roa

Each of the above methods is applicable under different con-

ditions. Method (i) which involves least distortion of the pavement will be found suitable in most of the situations where there are no physical controls, and may be adopted in the normal course. Method (ii) is preferable where the lower edge profile is a major control, e.g. on account of drainage. Where overall appearance is the criterion, method

The extra width should be continued over the full length of the

circular curve. On curves having no transition, widening should be achieved in the same way as the superelevation i,e. two-third being attained on the straight section before start of the curve and one-third on the curve. law.resource.org

Minimum length of

speed cent) not requiring a vertical vertical curve (km/h) curve (metres) law.resource.org

10.4.1. The length of summit curves is governed by the

choice of sight distance. The length is calculated on the basis of the following formulae: (a) For safe stopping sight distance Case (i) When the length of the curve exceeds the required sight distance, i.e. L is greater than S ^ - ~4A' where N — deviation angle, i.e. the algebraic difference between the two grades L = length of parabolic vertical

Case (ii) When the length of the curve is less than the

required sight distance, i.e. L is less than S (b) For intermediate or overtaking sight distance law.resource.org

11.1. The overall appearance of a highway can be enhanced

considerably by judicious combination of the horizontal and vertical alignments. Plan and profile of the road should not be designed independently but in unison so as to produce an appropriate three- dimensional effect. Proper co-ordination in this respect will ensure safety, improve utility of the highway and contribute to overall aesthetics. law.resource.org

11.2. The degree of curvature should be in proper balance

with the gradients. Straight alignment or flat horizontal curves at the expense of steep or long grades, or excessive curvature in a road with flat grades, do not constitute balanced designs and should be avoided. law.resource.org

CROSS SECTION T ««-NORUL C«MSCII

CROSS SECTION *T SS-IOVERSC OMStR RCMOVIO CROSS SECTION AT CC-SURCRCLevOTION EOUtL TO CtHtCK CROSS SECTION *T OD-rULL SURCRCLCV'TION ACHIEVIO THE R»TE or CHANGE Of SUPEREUBV»TlON ILONSITUOINAL SLORt or EDGE COUPAREO TO CENTRELINEI SHOULD «E UINIUUM I IN MO roR ROtDS IN PLAIN AND ROLLING TERRAIN ANO I IN SO IN MOUNTAINOUS ANO STECr TERRAIN THE ACTUA

VERTICES OF HORIZONTAL 4N0 VEBTICAL

CURVES COINCIDE. VERTICAL CURVE KEPT WITHIN HORIZONTAL CURVE. law.resource.org

PLAN 5 --f^

' ' ^ ^ } .,„,r-"">'>'»>nm,„,„„rrf<^" SIMILAR TO Ibi BUT ONE PHASE SKIPPED IN T'-E HORIZONTAL PLANE. VERTICES Of CURVES STILL CCINCIOE. A SATISFACT'.RY APPEARANCE RESULTS. p'cOf'lE law.resource.org

HAZARDOUS LEVEL CROSSING

(OR ROAD IflTERSECTlON) AND SHARP HORIZONTAL CURVE ARE OBSCURED FROM ORIVFr's VIFW BYtimLiiT. CURVE. DANGEROUS SITUATION. law.resource.org

PROFILE

^^^

PDF	IRC-73 1980 Geometric Design Standards for Rural (Non-Urban 20 "Manual on Route Location

PDF	IRC 073: Geometric Design Standards for Rural (Non-Urban IRC {. 73-1980. GEOMETRIC DESIGN. STANDARDS. FOR. RURAL (NON-URBAN). HIGHWAYS. Published by. THE INDIAN ROADS CONGRESS. Jamnagar Honse Shahjahan Road

PDF	IRC-73-1980 horizontal curves 20 "Manual on Route Location

PDF	MANUAL OF SPECIFICATIONS ANd STANdARdS FOR TWO IRC:SP:73-2018. MANUAL OF SPECIFICATIONS ANd. STANdARdS FOR TWO LANING OF. HIGHWAYS WITH PAVEd SHOULdER. (Second Revision). Published by:.

PDF	HIGHWAY ENGINEERING DESIGN DATA HAND BOOK (IRC: 73-1980). 1.1 CLASSIFICATION OF NON-URBAN ROADS. Non-urban roads in India are classified into following five categories based on location and.

PDF	INDIAN ROADS CONGRESS IRC:73-1980. Geometric Design Standards for Rural (Non-. Urban) Highways. 120.00. 20.00. 72. IRC:74-1979. Tentative Guidelines for Lean-Cement.

PDF	IRC SP 023: Vertical Curves for Highways by the Indian Roads Congress vvie IRC: 73-1980 for Rural (Non-. Urban) Highways and IRC: 86-1983 for Urban Roads. Shock-free Curves at Humps.

PDF	1-volume-1.pdf (Sincf published as IRC : 73-1980). Guidelines forthe Design of Rigid Pavements for Highways. Recommended Practice for Borrowpits for Road Embankments

PDF	IRC SP 073: Manual of Standards and Specifications for Two Laning IRC:SP:73-2007. MANUAL. OF. STANDARDS & SPECIFICATIONS be free to adopt international practices alternative specifications

PDF	Geometric design standards for urban roads and streets percent cross slope of the country given in IRC:73. classes of urban roads and streets have been recommended in the IRC Manual ... Obstruction Free Min.

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