IRC Code 35: A Comprehensive Guide to Road Markings in India

India's rapidly expanding road network requires more than just quality pavement construction. Safe and efficient transportation depends heavily on clear, visible, and well-maintained road markings that guide millions of motorists, cyclists, and pedestrians every day.

The framework governing these markings is IRC 35 road marking standards India, published by the Indian Roads Congress (IRC). The code establishes uniform requirements for pavement marking design, materials, colours, dimensions, application methods, and maintenance practices across the country.

As the saying goes, "A clear path prevents a dangerous journey." In road engineering, clear markings play a critical role in preventing accidents, improving lane discipline, and enhancing traffic flow.

Today, advanced technologies such as AI road marking detection India solutions are helping authorities monitor road marking quality at scale while ensuring compliance with national standards.

Road marking standards and safety guide

What is IRC Code 35?

IRC Code 35, formally known as the Code of Practice for Road Markings, provides standardised guidelines for pavement markings on:

  • National Highways
  • Expressways
  • Urban Roads
  • Rural Roads
  • Service Roads
  • Smart City Corridors

The latest revision, IRC 35:2015, reflects modern traffic conditions, improved marking materials, and enhanced visibility requirements.

The objective is simple:

  • Improve road safety
  • Standardise markings nationwide
  • Enhance driver guidance
  • Increase pedestrian protection
  • Improve night-time visibility

Uniform markings ensure road users receive consistent visual information regardless of where they travel within India.

Why Road Markings Are Essential for Road Safety

Road markings serve as continuous communication tools between road authorities and road users.

They become especially important during:

  • Night driving
  • Rainfall
  • Fog conditions
  • High-speed travel
  • Congested urban traffic

Properly maintained markings help:

  • Define lanes clearly
  • Regulate overtaking behaviour
  • Guide turning movements
  • Support traffic signs and signals
  • Improve pedestrian safety
  • Reduce crash risks

Modern AI road safety audit India platforms increasingly include road marking assessments as a critical component of roadway safety evaluations.

Categories of Road Markings Under IRC Code 35

IRC Code 35 classifies pavement markings into several functional categories.

Longitudinal Markings

These markings run parallel to traffic flow and regulate vehicle movement.

Examples include:

  • Broken lane divider lines
  • Solid centre lines
  • Double solid no-overtaking lines
  • Edge lines

They provide continuous lane guidance and improve roadway discipline.

Transverse Markings

These markings are installed across traffic flow.

Common examples include:

  • Stop lines
  • Give-way markings
  • Pedestrian crossings

They help regulate vehicle behaviour at intersections and pedestrian facilities.

Hazard Markings

Hazard markings warn drivers of potential conflicts or restricted areas.

Examples include:

  • Chevron markings
  • Diagonal hatch areas
  • Channelising islands

These markings improve driver awareness in high-risk zones.

Block Markings

Block markings identify specific safety-sensitive areas such as:

  • School zones
  • Speed calming sections
  • Pedestrian-priority areas
  • Special traffic control zones

They improve road user awareness and encourage safer driving behaviour.

Directional and Arrow Markings

Directional guidance is provided through:

  • Straight-ahead arrows
  • Left-turn arrows
  • Right-turn arrows
  • U-turn arrows

These markings assist drivers in selecting the correct lane before reaching intersections.

Facility Markings

Facility markings identify dedicated infrastructure spaces such as:

  • Bus lanes
  • Bicycle lanes
  • Parking bays
  • Accessible parking zones

These markings support organised and inclusive transportation systems.

Road Marking Materials Recommended by IRC 35

Material selection plays a major role in marking durability and visibility.

Thermoplastic Markings

Thermoplastic materials remain the most widely used permanent marking solution in India.

Benefits include:

  • High durability
  • Strong adhesion
  • Excellent visibility
  • Long service life

Modern thermoplastic road marking AI inspection systems help authorities monitor wear patterns and performance across large networks.

Waterborne and Solvent-Based Paints

These materials are generally used for:

  • Temporary markings
  • Low-volume roads
  • Short-duration projects

Although economical, they typically require more frequent maintenance.

Cold Applied Plastics (CAP)

Cold-applied plastic systems offer:

  • Enhanced durability
  • Strong colour retention
  • Superior skid resistance

They are commonly used in high-performance applications.

Preformed Adhesive Tapes

These materials provide:

  • Rapid installation
  • Immediate usability
  • Consistent marking quality

They are particularly useful in high-priority urban corridors.

Importance of Retroreflectivity

Night-time visibility is one of the most critical performance requirements for pavement markings.

Retroreflective glass beads embedded within marking materials reflect vehicle headlights back toward drivers, improving visibility in:

  • Darkness
  • Rain
  • Fog
  • Low-light environments

Modern road marking retroreflectivity AI survey India solutions help transportation agencies continuously evaluate marking performance and identify areas requiring maintenance.

Without adequate retroreflectivity, road markings lose much of their safety value.

Colour Standards Under IRC Code 35

The code establishes standard colour usage to ensure consistency across India.

White

Used for:

  • Lane lines
  • Centre lines
  • Pedestrian crossings
  • Directional arrows

Yellow

Used for:

  • No-overtaking zones
  • Median markings
  • Parking restrictions

Blue

Used for:

  • Bus priority facilities
  • Special-use lanes

Green

Used for:

  • Bicycle infrastructure
  • Sustainable mobility facilities

Red and Purple

Used in:

  • High-risk areas
  • Special warning zones

Consistent colour coding improves road user understanding and reduces confusion.

Inspection, Testing, and Maintenance Requirements

Road markings deteriorate due to:

  • Traffic wear
  • Weather exposure
  • UV degradation
  • Surface ageing

IRC Code 35 requires periodic evaluation of:

  • Reflectivity
  • Skid resistance
  • Adhesion strength
  • Alignment accuracy
  • Material durability

Modern automated road marking condition assessment systems allow agencies to inspect thousands of kilometres of roads quickly and consistently.

How AI is Transforming Road Marking Compliance

Traditional visual inspections often struggle to cover large road networks efficiently.

Today, AI pavement marking compliance NHAI solutions use computer vision and mobile imagery to automate compliance monitoring.

These systems can:

  • Detect missing markings
  • Identify faded lane lines
  • Measure marking visibility
  • Monitor deterioration trends
  • Generate compliance reports

Advanced lane marking fading AI detection dashcam technology enables continuous roadway assessments using existing fleet vehicles without disrupting traffic.

Supporting Smarter Road Safety Audits

Road markings are a key component of broader roadway safety evaluations.

Modern road safety audit road markings AI India platforms integrate pavement marking inspections with:

  • Sign inventory assessments
  • Road asset management
  • Surface condition surveys
  • Visibility analysis
  • Risk hotspot identification

This creates a comprehensive approach to infrastructure safety management.

RoadVision AI and Intelligent Road Marking Monitoring

RoadVision AI helps authorities digitise road marking inspections through:

  • NHAI road marking quality compliance AI monitoring
  • Automated lane marking assessments
  • Road inventory management
  • Pavement condition intelligence
  • Asset compliance reporting
  • GIS-based infrastructure mapping

The platform supports engineers and road authorities in maintaining safer, more visible, and more compliant road networks.

Final Thoughts

IRC 35 road marking standards India provide the foundation for consistent, durable, and highly visible pavement markings across the country's transportation network.

By standardising marking categories, materials, colours, and maintenance practices, IRC Code 35 helps improve traffic discipline, reduce accidents, and enhance overall road safety.

With emerging technologies such as AI roadway safety management, AI-based infrastructure safety management, and AI infrastructure safety analysis, authorities can now monitor compliance more efficiently than ever before.

Road markings may seem simple, but they remain one of the most powerful tools for creating safer roads and more predictable traffic movement.

Because when road users can clearly see the path ahead, everyone travels more safely.

Ready to Improve Road Marking Compliance Across Your Network?

Road markings are one of the most critical elements of roadway safety, but maintaining visibility, durability, and compliance across thousands of kilometres can be challenging. With RoadVision AI, agencies can automate inspections, monitor marking performance in real time, and ensure alignment with IRC standards through AI-powered analytics.

Book a demo today to see how RoadVision AI can help you streamline road marking audits, identify faded or non-compliant markings, improve maintenance planning, and enhance roadway safety with data-driven infrastructure intelligence.

FAQs

Q1. What is IRC Code 35?

IRC Code 35 is the official Indian Roads Congress guideline that establishes standards for pavement marking design, materials, colours, application methods, visibility requirements, and maintenance practices across India.

Q2. How does AI help monitor road markings?

AI-powered inspection systems use computer vision and roadway imagery to detect faded markings, missing lane lines, visibility issues, and compliance gaps while generating automated maintenance reports.

Q3. Why is retroreflectivity important for road markings?

Retroreflectivity ensures road markings remain visible at night and during adverse weather conditions by reflecting vehicle headlights back toward drivers, improving guidance and reducing accident risk.