IRC Code 35: Ensuring Safety at Intersections with Transverse Road Markings

RoadvisionAI strengthens intersection safety through AI road marking inspection, ensuring Transverse Road Markings comply with Pavement Marking Standards under IRC Code 35:2015.

Intersections are high-conflict zones where vehicles, pedestrians, cyclists, and turning traffic converge. Even a brief hesitation can lead to serious consequences. That is why clear pavement guidance at junctions is critical.

Across India, transverse markings are standardised under IRC:35-2015 issued by the Indian Roads Congress. These markings regulate stopping, yielding, and pedestrian priority, bringing structure to complex traffic environments.

At intersections, every line carries meaning.

All you need to know about Road Marking in India
Road Markings

1. What Are Transverse Road Markings?

Transverse Road Markings are pavement lines laid across the direction of traffic movement.

As defined in IRC Code 35:2015, they are used to:

  • Control vehicle movement at junctions
  • Indicate mandatory stopping or yielding
  • Define pedestrian crossing zones
  • Support speed reduction near intersections

Common transverse markings include:

  • Stop Lines
  • Give Way (Yield) Lines
  • Pedestrian Crossings (Zebra Markings)
  • Transverse Speed Reduction Bars

They act as silent regulators of traffic discipline.

2. Why Transverse Road Markings Matter at Intersections

At intersections, drivers must instantly decide whether to stop, slow, yield, or proceed. Transverse Road Markings:

  • Provide mandatory stopping points
  • Clarify right-of-way priority
  • Reduce vehicle-to-vehicle conflicts
  • Improve pedestrian safety
  • Reinforce signals and regulatory signage

When integrated with proper signage and signalisation, they significantly reduce crash risks and improve traffic flow efficiency.

3. Types of Transverse Road Markings Under IRC Code 35

3.1 Stop Lines (TM01)

As per Section 6.1 of IRC:35-2015:

  • Solid continuous white line across the carriageway
  • Used at signalised intersections and stop-controlled junctions

Placement Guidelines

  • Positioned at least 1.5 m before the nearest edge of the crosswalk or intersection
  • Ensures adequate reaction time and visibility

Recommended Width

  • Typically 150 mm (urban areas for higher visibility)

A stop line communicates one uncompromising instruction: stop before this line.

3.2. Give Way (Yield) Lines (TM02, TM03)

As per Section 6.2:

  • Marked using broken transverse lines
  • Installed at unsignalised intersections requiring yielding

Typical Pattern

  • 450 mm line segments
  • 150 mm gaps

Often supported by:

  • Triangular yield symbols on pavement
  • Vertical regulatory yield signs

These markings regulate right-of-way without requiring signal control.

3.3. Pedestrian Crossings (BM01 – Zebra Markings)

Defined under Section 11.3 of IRC Code 35:

Zebra crossings consist of white rectangular blocks laid across the carriageway.

Key Specifications

  • Recommended width: 2.5 m to 4.0 m (based on pedestrian volume)

Common Locations

  • Signalised intersections
  • School zones
  • Bus stops
  • Urban mid-block crossings

Zebra crossings prioritise pedestrian movement and increase visibility at conflict points.

3.4. Transverse Bar Markings (Speed Calming Alerts)

As per Section 11.2:

  • Series of parallel bars across the carriageway
  • Used as advance warnings before intersections

Typical Dimensions

  • Bar width: 150 mm
  • Spacing: 500 mm intervals

Benefits

  • Vibrational feedback to drivers
  • Audible warning
  • Psychological speed reduction

They are particularly effective near pedestrian crossings and accident-prone junctions.

4. Material Specifications for Transverse Road Markings

IRC:35-2015 recommends durable, high-visibility materials such as:

Thermoplastic (Hot Applied)

  • Long service life
  • Strong retroreflectivity

Cold-Applied Plastics

  • Suitable for heavy traffic corridors

Preformed Adhesive Tapes

  • Ideal for high-volume urban intersections

For nighttime performance:

  • Glass beads must be embedded for retroreflectivity

A marking that cannot be seen cannot perform its safety function.

5. Design and Placement Principles

Correct positioning depends on intersection geometry and available sight distance. Key considerations include:

  • Stop lines must ensure clear cross-traffic visibility
  • Give Way markings should align with regulatory signage
  • Roundabouts require yield lines at entry points
  • Complex junctions may require additional channelisation markings

Consistency ensures instant driver recognition and compliance.

6. Maintenance and Performance Monitoring

Sections 15 and 16 of IRC Code 35:2015 emphasise routine evaluation through:

  • Retroreflectivity testing
  • Skid resistance checks
  • Wear and thickness assessment
  • Scheduled repainting

Faded Transverse Road Markings increase confusion, especially at night or during rainfall. Proactive inspection sustains long-term safety performance.

7. Where Transverse Road Markings Are Essential

They are mandatory at:

  • Urban signalised intersections
  • Rural T-junctions
  • School zones and pedestrian-heavy areas
  • Roundabout entries
  • Speed-sensitive approaches

Uniform application across road categories strengthens driver expectations and behaviour.

8. Integration with Road Studs and Signs

For enhanced visibility and compliance:

  • Stop lines may be supported with reflective studs
  • Raised pavement markers improve wet-weather performance
  • Vertical signs must align precisely with pavement markings

When pavement markings and signage reinforce each other, intersection clarity improves significantly.

9. Final Thoughts

Transverse Road Markings are powerful yet often underestimated components of intersection safety. By adhering to Pavement Marking Standards defined in IRC Code 35:2015, authorities can ensure:

  • Consistent intersection control
  • Safer pedestrian crossings
  • Reduced traffic conflicts
  • Improved driver awareness
  • National uniformity

As traffic density continues to grow, properly designed and maintained transverse markings remain critical to Road Safety Engineering across India.

Because at intersections, every line matters.

10. RoadvisionAI and Smarter Intersection Safety

roadvisionai enhances compliance with IRC Code 35:2015 through AI-powered inspection tools such as Pavement Condition Intelligence Agent  and AI road marking inspection platforms.

Automated pavement surveys detect:

  • Faded stop lines
  • Worn zebra crossings
  • Surface deterioration
  • Compliance gaps with IRC standards

By enabling timely maintenance and real-time monitoring, roadvisionai strengthens intersection safety, accountability, and regulatory compliance nationwide.

FAQs

Q1. What are transverse road markings in IRC Code 35?
They are pavement markings laid across the direction of traffic such as stop lines, give-way lines, and zebra crossings used to regulate movement at intersections.

Q2. How do transverse markings improve safety?
They provide clear visual instructions for stopping and yielding, reducing confusion and preventing junction-related collisions.

Q3. Where should transverse markings be applied?
At intersections, pedestrian crossings, school zones, roundabout entries, and other locations requiring controlled traffic behaviour.