Route Marker Signs for National Highways: A Comprehensive Guide Of IRC- 002

Efficient road navigation is crucial for smooth traffic flow and traveler convenience. Recognizing this, the Indian Roads Congress (IRC) developed standardized Route Marker Signs for National Highways. These signs ensure clarity and uniformity, guiding drivers effectively across India's vast road network. Here's a detailed look at the IRC:2-1968 guidelines for these markers.

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The concept of route marker signs along National Highways was first introduced in 1952 by the Ministry of Transport. The finalized design, based on discussions at a Chief Engineers' meeting, became the standard in 1953. With India's transition to the metric system, the IRC revised these standards in 1968 to align with metric measurements and introduced enhancements to improve usability.

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Design of Route Marker Signs

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1. Dimensions and Shapesome text
   • The marker is a shield painted on a rectangular plate measuring 450 mm by 600 mm.
   • The design details are specified in Plate 1 of the IRC guidelines.
2. Color Schemesome text
   • Yellow background: Conforms to “Canary Yellow, Indian Standard Colour No. 309.”
   • Black lettering and borders: Ensures high visibility and contrast.
3. Lettering and Numeralssome text
   • Standardized font size and spacing for letters and numerals.
   • Details are provided in Fig. 1 and related plates to maintain uniformity.

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Placement and Location Guidelines

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1. Key Locationssome text
   • At intersections with major roads.
   • As confirmatory markers immediately after intersections.
   • In built-up areas and other necessary points to assist through traffic.
2. Positioning on Roadssome text
   • Without curbs: 2–3 meters from the carriageway edge.
   • With curbs: At least 60 mm from the curb edge.
   • Signs should be slightly turned away from the road to reduce glare and improve readability.
3. Distance from Junctionssome text
   • Signs must be placed 100 to 150 meters ahead of a junction.
   • Always positioned on the left-hand side of the road as the junction is approached.

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Definition Plate for Directions

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To clarify the direction of the National Highway at junctions:

• A definition plate measuring 300 mm by 250 mm is affixed below the route marker shield.
• The plate includes arrows indicating the route's direction, with the same color scheme as the shield (yellow background and black arrows).

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Route Marker Assemblies at Numbered Junctions

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At intersections with numbered routes:

• Auxiliary markers for the intersecting route are mounted on the same post as the National Highway marker.
• Accompanied by definition plates with single or double-headed arrows to indicate directions.
• Plate 4 illustrates such assemblies.

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Material and Maintenance

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1. Materialssome text
   • Markers can be made from enameled or painted steel plates for durability.
2. Back of Signs and Postssome text
   • The reverse side of the signs is painted unobtrusive grey (Indian Standard Colour No. 630).
   • Posts are painted in 25 cm black and white bands, with the bottommost band being black.

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Significance of Standardized Route Markers

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Uniformity in route markers enhances road safety and traveler experience by providing clear, consistent guidance. The use of color, standardized lettering, and strategic placement ensures high visibility and minimizes confusion for drivers.

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Conclusion

The IRC:2-1968 standards for National Highway route markers exemplify meticulous planning in road infrastructure. By adhering to these guidelines, authorities can ensure smoother traffic flow, better road safety, and an enhanced experience for road users across India.