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IRC 67 : 2012Code of Practice for Road Signs

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MUTCD · Vienna Convention on Road Signs

CurrentFrequently UsedCode of PracticeTransportation · Roads and Pavement

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IRC 67:2012 is the Indian Standard (IRC) for road signs. IRC 67 is India's standard for road signs — defines the shape, colour, size, and placement of every traffic sign on Indian roads. Red circle = regulatory, yellow triangle = warning, blue/green rectangle = informatory. All signs must use retro-reflective sheeting for night visibility.

Standards for design, placement, and use of road signs on Indian highways covering regulatory, warning, informatory, and direction signs.

Quick Reference — IRC 67:2012 Road Signs

Key reference values — verify against the current code edition / project specification.

✓ Verified 2026-05-15

Reference	Value	Clause
Sign categories	Regulatory / Warning / Informatory & direction	Classes
Shapes	Circular (regulatory) · triangular (warning) · rectangular (info)	Convention
Placement	Advance distance set by approach speed	Siting
Retro-reflective	Sheeting class for night legibility	Materials
Legend	Letter/numeral size per IRC 30 & legibility distance	IRC 30
Mounting height/offset	Standardised clearance from carriageway	Siting

⚠ Indicative reference values from the code/standard practice; the binding figures are those in the current edition and the project specification.

Overview

Status: Current
Usage level: Frequently Used
Domain: Transportation — Roads and Pavement
Type: Code of Practice

International equivalents

MUTCD · FHWA (US)Vienna Convention on Road Signs · UNECE

Typically used with

IRC 35 IRC 86

Also on InfraLens for IRC 67

29Key values 11Tables 13FAQs

Practical Notes

! Retro-reflective sheeting is mandatory on ALL road signs — non-reflective signs are useless at night.

! Sign placement: 45m before hazard for warning signs at 80 km/h.

! Bilingual signs (Hindi/English + regional language) are standard on NH.

! Always ensure signs are placed at a consistent mounting height (1.5m to 2.5m) to maximize visibility for drivers. Avoid placing them too low where they can be obstructed by vegetation or too high where they are less impactful.

! Lateral placement is crucial. Maintain the minimum clearance of 0.5m from the edge of the pavement. For high-speed roads like Expressways and NHs, a greater clearance might be warranted for safety.

! Legibility is paramount for direction signs. Use standard fonts (like Highway Gothic or similar as per national standards) and ensure adequate letter height and spacing as per Table 1. Letters should be bold and clear.

! Consistency in sign design and placement across a corridor is key for driver familiarity. NHAI and MoRTH guidelines often supplement IRC 67 for national projects.

! Regular maintenance is as important as design. Signs must be kept clean, free from damage, and properly oriented. Faded or damaged signs are worse than no signs at all.

! For rural roads or PMGSY projects, scaled-down versions of signs might be acceptable, but legibility and conspicuity should not be compromised.

! Warning signs are most effective when placed far enough in advance for drivers to react. Consider the approach speed and safe stopping distance when determining placement.

! Regulatory signs must be unambiguous and immediately understandable. Avoid over-signing; use signs only when absolutely necessary to convey a mandatory requirement.

! Reflectivity of sign faces is critical for nighttime visibility. Ensure the chosen material grade (e.g., Grade II for high intensity prismatic) is appropriate for the road type and expected traffic volumes.

! The choice of colors is standardized for a reason. Deviating from these standards can lead to confusion and misinterpretation by drivers.

! Ensure sufficient spacing between signs, especially for regulatory and warning signs, to prevent information overload. Refer to Table 2 for minimum and maximum spacing.

! When designing complex intersections, consider the driver's decision-making process. Signs should provide clear guidance well in advance of the decision point.

! For direction signs, include destination names in descending order of travel distance. Use standard abbreviations where appropriate.

! The use of supplementary plates (e.g., distance plates) should be judicious and clear.

! Always cross-reference IRC 67 with other relevant IRC codes for specific road types (e.g., IRC 8 for highways, IRC 9 for urban roads) and other traffic control devices.

Frequently referenced clauses

Cl. 3 — Regulatory signs (mandatory, prohibitory)

Cl. 4 — Warning signs

Cl. 5 — Informatory signs (direction, place identification)

Cl. 6 — Sign placement height and offset

Cl. 7 — Retro-reflective sheeting grades

Cl. 4.1 — General requirements for signs

Cl. 5.1 — Classification of signs (Regulatory, Warning, Informatory, Direction)

Cl. 6.2 — Design of Regulatory Signs (Specific shapes and meanings)

Cl. 7.2 — Design of Warning Signs (Specific symbols and meanings)

Cl. 8.2 — Design of Informatory Signs (Specific types and purposes)

Cl. 9.2 — Design of Direction Signs (Panels, legibility, layout)

Cl. 10.1 — Materials and Construction for signs

Cl. 11.1 — Illumination and Retroreflection of signs

Cl. 12.1 — Placement and Mounting of Signs

Cl. 13.1 — Maintenance of Signs

road signstraffic signsregulatory signswarning signshighway signageIRC

Engineer's Notes

In Practice — Editorial Commentary

When IRC 67 is your governing code

IRC 67 (2012) is the Code of Practice for Road Signs — India's authoritative document for road signage on all classes of highways + urban roads. It is the daily reference for highway designers, traffic engineers, road safety auditors, and contractors handling signage BOQ. It pairs intimately with IRC:35:2015 (road markings) — together these two define driver guidance, regulatory information, and warning systems on Indian roads.

Use IRC 67 when you are: - Preparing road-furniture BOQ for any highway, urban, or rural project - Designing regulatory + warning + informatory signage at NH/SH/district/urban roads - Doing road safety audit — sign placement, visibility, retroreflectivity - Re-engineering black-spot signage + crash mitigation - Specifying work-zone signage (IRC:SP-55:2014 + IRC 67) - Doing PMGSY rural road signage - Specifying signage at rotaries, intersections, schools, bus stops, hospitals

What IRC 67 covers: - Sign categories (regulatory, warning, informatory) - Standard sign dimensions + shape - Colour codes - Mounting + lateral / vertical clearance - Sign font (lettering per IRC:30:1968) - Retroreflectivity (initial + service-life thresholds) - Substrate material (aluminium, MS, FRP) - Reflective sheeting (Class A, B, C; commercial vs HIP vs DG) - Installation procedure - Maintenance + cleaning intervals - Specific sign messages + symbol drawings

Sign categories + design parameters

Three primary sign categories:

1. Regulatory signs (red/black on white background): - Mandatory directional: Stop, Give Way, No Entry, No Right Turn, One-Way - Speed limit: posted in km/h; red circle around number - Weight / size restrictions: posted on bridges + structures - Prohibitions: No Parking, No Honking, No Pedestrians - Action required: drivers must comply; legally enforced

2. Warning signs (yellow/black; diamond shape): - Geometric warnings: Curve Ahead, Steep Gradient, Narrow Bridge - Conflict warnings: Pedestrian Crossing, School Ahead, Cattle Crossing - Surface warnings: Slippery Surface, Rough Road, Loose Gravel - Construction: Roadwork Ahead - Action required: advisory; reduce speed + caution

3. Informatory signs (white/black or green; rectangular): - Destination signs: Distance to next major city / village - Service signs: Petrol Pump, Hospital, Hotel - Direction signs: Route indicators (NH, SH, expressway) - Tourist signs: Heritage, Park, Museum (typically brown background) - Action required: information only; driver may use or ignore

Sign dimensions (typical): - Mandatory speed-limit (rural NH): 600-900 mm circle - Warning sign (rural NH): 600-900 mm diamond - Mandatory speed-limit (urban): 600-750 mm circle - Warning sign (urban): 600-750 mm diamond - Destination signs: typically 600 × 900 mm or 750 × 1200 mm - Service signs: 600 × 600 mm or 600 × 900 mm

Mounting: - Height to bottom edge of sign: 1.5-2.5 m above road surface (urban); 2.0-2.5 m (rural) - Lateral offset from carriageway edge: 1.5-3.0 m - Pole installation: mass concrete foundation; sign at right angles to traffic - Group of signs: vertical spacing 100-200 mm between signs

Lettering: - Standard font per IRC:30:1968 — Calibri or Helvetica style for English; Devanagari standard for Hindi - Letter height varies by sign type + viewing distance: - Regulatory speed-limit: 200-300 mm digit height - Destination signs (rural): 150-300 mm depending on viewing distance - Service signs: 75-150 mm

Visibility distance (sign legibility): - Speed limit at 50 km/h: legible at 30-50 m - Warning sign at 50 km/h: advance distance 80-150 m - Destination sign at 80 km/h: advance distance 150-200 m - Stop sign: legible at SSD (stopping sight distance) per design speed

Reference values — materials + retroreflectivity

Sign substrate: - Aluminium: preferred for highway signage; lightweight + corrosion-resistant; 1.5-3 mm thick - Mild steel (galvanized): for low-traffic + rural; 1.5-2 mm; coated against rust - FRP (Fiberglass Reinforced Plastic): for premium signs; lightweight - Composite materials: modern options; weather-resistant

Reflective sheeting types (retro-reflectivity classes):

| Class | Material | Initial Brightness | Service Life | Use | |---|---|---|---|---| | Class A (commercial) | Engineering grade | 50-75 mcd/m²/lx | 5-7 years | Rural / low-traffic | | Class B (high intensity) | High-intensity prismatic | 250-500 mcd/m²/lx | 7-10 years | SH / NH 2-lane | | Class C (DG / diamond grade) | Diamond grade | 500-1000+ mcd/m²/lx | 10-12 years | NH 4/6-lane / expressway |

Retroreflectivity thresholds: - Initial: as specified above - Maintenance threshold (replace when below): 50 mcd/m²/lx for commercial; 100 for HIP; 250 for DG - Service-life criterion: retroreflectometer measurement at 5-year intervals

Colour codes: - Regulatory: red (mandatory), white background with black text - Warning: yellow background with black - Informatory: white / blue / green / brown background depending on type - Bus / lane indication: specific colors per type - Construction: orange + black (per IRC:SP-55:2014)

Anti-fade pigments: - High-quality pigments rated for UV resistance - Service life ~10 years for outdoor exposure - Test for fade resistance + colour stability

Mounting hardware: - Pole: Galvanized steel, 50-75 mm diameter - Anchorage: Concrete foundation 600 × 600 × 600 mm typical - Bolts: Stainless or galvanized; HSFG for critical applications - Sign-mount brackets: Aluminium or galvanized; allow adjustment

Installation: - Foundation construction + curing - Pole erection + plumb check - Sign assembly + mounting - Bolt tightening to specification - Alignment verification (perpendicular to traffic) - Cleaning + final inspection

Quality control: - Sheeting retroreflectivity test (initial) - Substrate thickness + quality verification - Lettering legibility + alignment - Mounting + alignment verification - Foundation quality verification

Acceptance: - Retroreflectivity per class - Visual inspection — no defects - Mounting alignment - Cleanliness

Maintenance schedule: - Daily: general visual inspection by road operator - Monthly: detailed inspection (cleanliness, defects, vegetation) - Annual: retroreflectometer testing (10 % sample minimum) - 5-year: retroreflectometer testing (100 % coverage); replacement if below threshold - As needed: damaged sign replacement; vegetation clearing

Vandalism + theft: - Tamper-resistant fixtures - Anti-graffiti coatings (where applicable) - Quick-replacement spare inventory - Local enforcement coordination

Companion codes (must pair with)

IRC:35:2015 — Road Markings. Signs + markings designed together.
IRC:30:1968 — Standard Letters + Numerals. Lettering specification.
IRC:SP-55:2014 — Traffic Management in Work Zones.
IRC:SP-44:1996 — Road Safety Audit Guidelines.
IRC:65:2017 — Traffic Rotaries. Rotary advance signs.
IRC:99:2018 — Speed Breakers.
IRC:103:2012 — Pedestrian Facilities. Pedestrian crossing signs.
IRC:105:2019 — Work Zone Traffic Control. Modern work zone signage.
IRC:38:1988 — Horizontal Curves. Curve warning signs.
IRC:73:1980 — Rural Highway Geometric Design.
IRC:86:1983 — Urban Road Geometric Design.
IRC SP 12 — Reflectorisation of Road Markings.
IRC SP 31 — Tentative Guidelines on Detection of Speed-Breakers (older).
IRC SP 90 — Manual on Grade Separators (signage at flyovers).
IS 7888 — Code of Practice for Erection of Tubular Steel Poles.
IS 1239 — Steel Tubes for Structural Purposes.
IS 1554 — PVC Insulated Cables.
ASTM D 4956 — Standard Specification for Retroreflective Sheeting.
AASHTO M 268 — Standard Specification for Retroreflective Sheeting.
Vienna Convention on Road Signs + Signals (international reference).
MoRTH Specifications for Road and Bridge Works — Section 800 (Traffic Signs, Markings).

Common pitfalls / what reviewers flag

1. Wrong size for road class. Sign at NH treated as urban; insufficient legibility distance. Size per IRC 67 table for road type + speed. 2. Retroreflectivity below threshold. Service-life threshold ignored; old signs left in place; night-time visibility poor. Annual retro testing + replacement. 3. Mounting too high / too low. Below 1.5 m: easy vandal target; above 2.5 m: driver focus disrupted. Per IRC 67 mounting guidelines. 4. Wrong placement distance. Speed-limit sign placed at intersection start; driver passes through before reading. Place per IRC 67 advance distance. 5. Multiple signs on one pole. Visual clutter; key sign missed. Per IRC 67: limit number of signs per pole. 6. Lateral offset inadequate. Sign too close to carriageway; struck by vehicles. 1.5-3.0 m offset per design. 7. Sign damaged + not replaced. Crashed sign left in damaged state for months. Quick replacement protocol. 8. Wrong reflective sheeting class. Class A on NH 6-lane; visibility inadequate. Class B / C for higher-class roads. 9. No anti-graffiti / vandal-resistant features. Signs frequently damaged; replacement costs. Robust + tamper-resistant fixtures. 10. Vegetation obscuring sign. Trees / shrubs blocking sign; effectively invisible. Regular trimming maintenance. 11. Signs missing at known hazard locations. Black-spot has no warning; crashes continue. Black-spot signage upgrade. 12. No road safety audit. Designer's signage adequate on paper; in-service issues. Mandatory pre-opening + 1-year audit. 13. Conflicting signs. Two signs giving different instructions; driver confused. Coordinate adjacent signs. 14. Sign substrate degrades. Sheeting peels; substrate corrodes. Choose appropriate material for environment. 15. No coordinated lighting. Signs unlit at night intersections; reflectivity insufficient. Add intersection lighting where needed. 16. Foundation inadequate. Sign falls in storm; safety + cost. Proper foundation design. 17. Maintenance budget cut. Signs degrade; safety degrades. Maintain budget; protected from cuts.

Where it sits in road-project + safety lifecycle

Signage project — IRC 67 touchpoints:

1. Design phase: - Sign requirements per road class + geometric features - Sign locations + spacing - Sign size + material selection - Retroreflective class per traffic - Mounting design + foundation - Visibility verification (advance distance + sight line)

2. Drawings: - Sign layout plan (along alignment) - Sign schedule with code, type, size, sheeting class - Mounting + foundation details - Special sign locations (rotaries, intersections, schools)

3. Tender + BOQ: - Sign quantity per type - Retroreflective sheeting specification - Mounting hardware - Foundation works - Acceptance retroreflectivity criteria + holdback

4. Construction: - Foundation preparation + curing - Pole erection - Sign assembly - Mounting + alignment - Final inspection + sign-off

5. Quality control + acceptance: - Retroreflectivity test per IRC 67 - Mounting alignment - Foundation quality - Sign cleanliness

6. Pre-opening: - Drive-through verification - Walk-through inspection - Road safety audit per IRC:SP-44:1996

7. Operations + maintenance: - Daily visual inspection by operator - Monthly cleaning + condition check - Annual retroreflectivity testing (10 % sample) - 5-year comprehensive testing + replacement of below-threshold - Damaged sign replacement (rapid response)

8. Lifecycle replacement: - Sheeting service life 5-12 years depending on class - Substrate longer (~20 years) - Full replacement at end of service life

IRC 67 is the fundamental signage reference for every Indian road — applied on every NH 4/6-laning, every state highway upgrade, every urban arterial project, every PMGSY rural road, and every road safety audit. Together with IRC:35:2015, it defines the visual communication system of Indian roads.

International Equivalents

Similar International Standards

MUTCDFHWA (US)

MediumCurrent

Manual on Uniform Traffic Control Devices

Both standardize traffic signs. MUTCD uses US sign shapes/colors; IRC 67 follows Vienna Convention.

Vienna Convention on Road SignsUNECE

HighCurrent

Convention on Road Signs and Signals

IRC 67 is based on the Vienna Convention which India has signed.

Key Differences

≠IRC (Vienna): octagonal STOP, circular regulatory. US (MUTCD): octagonal STOP, but many regulatory signs are rectangular.

Key Similarities

≈Red = prohibition, yellow/amber = warning is universal across IRC, MUTCD, and Vienna Convention.

Parameter Comparison

Parameter	IS Value	International	Source

⚠ Verify details from original standards before use

Key Values29

Quick Reference Values

Regulatory signRed circle on white, 600-900mm dia

Warning signYellow triangle, 600-900mm side

Speed limit sign900mm dia on NH

Sign mounting height1.5-2.5m (urban), 1.2-1.8m (rural)

Retro-reflective gradeType III min for NH

Minimum Letter Height for Direction Signs (Expressways/National Highways)150 mm

Minimum Letter Height for Direction Signs (State Highways/Major District Roads)100 mm

Minimum Letter Height for Informatory Signs (General)75 mm

Minimum Letter Height for Warning Signs (General)75 mm

Minimum Letter Height for Regulatory Signs (General)75 mm

Recommended Sign Mounting Height (Above Road Surface - Edge)1.5 m to 2.5 m

Minimum Horizontal Clearance from Edge of Pavement0.5 m

Maximum Spacing between Consecutive Signs of Same Type (Regulatory/Warning)200 m

Minimum Spacing between Consecutive Signs of Same Type (Regulatory/Warning)60 m

Color for Regulatory SignsRed border, white background, black legend

Color for Warning SignsRed border, white background, black legend (except for speed limit signs)

Color for Informatory SignsBlue background, white legend (destination, distance)

Color for Direction SignsGreen background, white legend

Color for Service SignsBlue background, white legend

Reflectivity Grade for Sign Faces (High Intensity Prismatic)Grade II

Reflectivity Grade for Sign Faces (Engineering Grade)Grade I

Minimum Letter Width (General)1/6th of letter height

Minimum Stroke Width (General)1/10th of letter height

Minimum Spacing between Letters (General)1/4th of letter height

Recommended Minimum Sight Distance for Warning SignsSafe Approach Speed x Reaction Time (approx. 2.5 seconds)

Standard Color for Stop SignRed

Standard Color for Yield SignRed

Standard Color for Speed Limit SignsRed border, white background, black numerals

Standard Color for No Entry SignRed circle with white horizontal bar

Key Formulas

Formula for Letter Height (H) in mm based on legibility distance (D) in metres and desired visual acuity (VA) - Though not explicit as a single formula, the code guides the selection based on tables.

Formula for Minimum Mounting Height (M) in metres = Roadway edge clearance + Sign height (based on Table 3)

Formula for Minimum Horizontal Clearance (C) in metres = Minimum distance from edge of pavement (based on Table 3)

Formula for Sight Distance for Warning Signs = Safe Approach Speed (m/s) x Reaction Time (seconds) x Vehicle Speed (m/s) - Implicit in guidance for sign placement.

Tables & Referenced Sections

Key Tables

Table 1 — Sign sizes by road type

Table 2 — Letter heights for direction signs

Table 3 — Placement distances

Table 1 — Lettering sizes for different types of signs and road categories

Table 2 — Minimum and maximum spacing of consecutive signs

Table 3 — Sign mounting height and lateral clearance

Table 4 — Standard colours for different types of signs

Table 5 — Reflectivity requirements for sign materials

Table 6 — Lettering fonts and stroke widths

Table 7 — Minimum sight distances for warning signs

Table 8 — Recommended sizes for traffic symbols

Frequently Asked Questions13

What are the colours of Indian road signs?+

Red circle = regulatory (mandatory/prohibitory). Yellow triangle = warning. Blue/green rectangle = informatory. Brown = tourist/heritage. These follow international Vienna Convention conventions.

What is the primary purpose of IRC 67:2012?+

IRC 67:2012 provides comprehensive guidelines for the design, manufacture, placement, and maintenance of road signs in India. Its primary purpose is to ensure uniformity, clarity, and effectiveness of traffic signs across the national highway network and other roads, thereby enhancing road safety and traffic management.

How do I determine the appropriate letter height for a direction sign?+

The letter height for direction signs depends on the road category (e.g., Expressway, National Highway, State Highway) and the desired legibility distance. IRC 67:2012, specifically Table 1, provides specific recommendations for minimum letter heights based on these factors to ensure drivers can read the signs from a safe distance.

What are the standard colors used for different types of road signs?+

IRC 67:2012 specifies distinct colors for different sign categories to convey meaning instantly. Regulatory signs typically have a red border and white background, warning signs have a red border and white background (with exceptions), direction signs use a green background with white lettering, and informatory signs often use a blue background with white lettering.

What is the recommended mounting height for road signs?+

The recommended mounting height for road signs is generally between 1.5 meters and 2.5 meters above the road surface at the edge of the pavement. This ensures good visibility for drivers while minimizing obstruction by passing vehicles or roadside features, as detailed in Table 3.

How far in advance should warning signs be placed?+

The placement distance for warning signs is crucial for driver reaction. It depends on the posted speed limit and the nature of the hazard. While a precise formula isn't always explicit, the code guides designers to consider safe approach speeds and reaction times, often referencing values found in Table 7, to ensure adequate sight distance for drivers to perceive and react to the warning.

What are the requirements for retroreflectivity of signs?+

Retroreflectivity is essential for sign visibility at night. IRC 67:2012 specifies different grades of retroreflective materials (e.g., Grade I - Engineering Grade, Grade II - High Intensity Prismatic) with minimum performance requirements outlined in Table 5. The choice of grade depends on the road type, traffic volume, and importance of the sign.

Can I use custom fonts for road signs based on IRC 67:2012?+

No, IRC 67:2012 generally recommends or implies the use of standard, legible fonts for road signs. Deviating from standard fonts can compromise legibility and international recognizability. The code focuses on letter dimensions, stroke widths, and spacing to ensure clarity.

What is the lateral clearance requirement for signs?+

The minimum horizontal clearance from the edge of the pavement for signs is 0.5 meters. However, for high-speed roads or where space permits, greater clearances are often preferred for safety and to prevent damage from errant vehicles. This is detailed in Table 3.

How often should road signs be inspected and maintained?+

Regular inspection and maintenance are critical. While specific frequencies aren't rigidly defined for all signs, a proactive approach is recommended. Signs should be checked for damage, fading, obstructions, and correct positioning at regular intervals, typically tied to routine road maintenance schedules.

Does IRC 67:2012 cover temporary signs used during road works?+

IRC 67:2012 primarily focuses on permanent road signs. However, the principles of clarity, visibility, and standardization it espouses should be applied to temporary signs as well. Specific guidelines for temporary traffic control devices are often found in other related manuals or standards.

What is the role of NHAI and MoRTH in relation to IRC 67:2012?+

NHAI (National Highways Authority of India) and MoRTH (Ministry of Road Transport and Highways) are the nodal agencies responsible for the development and maintenance of national highways. They often adopt and implement IRC codes like IRC 67:2012 in their projects and may issue supplementary guidelines or standard drawings to ensure uniformity and adherence to best practices.

Are there specific guidelines for sign placement in urban areas versus rural highways?+

Yes, while IRC 67:2012 provides general principles, specific application might vary. Urban roads may have different space constraints and traffic dynamics, necessitating adaptations in sign placement and size. Other IRC codes or local municipal by-laws might provide further specific guidance for urban environments.

QA/QC Inspection Templates

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QA/QC templates coming soon for this code.

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IRC 67 : 2012Code of Practice for Road Signs

PDF Google Compare IRC Portal

Link points to Internet Archive / others. Not hosted by InfraLens. Details

MUTCD · Vienna Convention on Road Signs

CurrentFrequently UsedCode of PracticeTransportation · Roads and Pavement

PDF Google Compare IRC Portal

Link points to Internet Archive / others. Not hosted by InfraLens. Details

Standards for design, placement, and use of road signs on Indian highways covering regulatory, warning, informatory, and direction signs.

Quick Reference — IRC 67:2012 Road Signs

Key reference values — verify against the current code edition / project specification.

✓ Verified 2026-05-15

Reference	Value	Clause
Sign categories	Regulatory / Warning / Informatory & direction	Classes
Shapes	Circular (regulatory) · triangular (warning) · rectangular (info)	Convention
Placement	Advance distance set by approach speed	Siting
Retro-reflective	Sheeting class for night legibility	Materials
Legend	Letter/numeral size per IRC 30 & legibility distance	IRC 30
Mounting height/offset	Standardised clearance from carriageway	Siting

⚠ Indicative reference values from the code/standard practice; the binding figures are those in the current edition and the project specification.

Overview

Status: Current
Usage level: Frequently Used
Domain: Transportation — Roads and Pavement
Type: Code of Practice