The 1968 IRC 2 standard outlines the specifications for designing, coloring, sizing, and placing route marker signs along India's National Highways. It offers comprehensive details on sign colors, lettering styles, arrow designs, and positioning to ensure consistent and clear navigation for motorists. This code is crucial for professionals overseeing the installation and upkeep of highway signage.
Overview
The 1968 IRC 2 standard outlines the specifications for designing, coloring, sizing, and placing route marker signs along India's National Highways. It offers comprehensive details on sign colors, lettering styles, arrow designs, and positioning to ensure consistent and clear navigation for motorists. This code is crucial for professionals overseeing the installation and upkeep of highway signage.
Audience
Contents
Structure
This section introduces IRC 2 and includes essential tables outlining numeral dimensions and spacing for road signage. For 20 cm tall numerals, precise millimeter measurements for parameters like 'a', 'b', 'c', 'e', and 'f' are tabulated. It also specifies spacing between numerals for various codes to maintain legibility and uniformity.
According to IRC 2, the background of route marker signs must be Canary Yellow matching Indian Standard Colour No. 309, with borders and lettering rendered in black. The paints used should comply with Indian Standards. Detailed dimensions for 20 cm high numerals are provided to ensure precise lettering and border design.
This section defines the positioning for National Highway route markers, requiring installation on the left side of the road when approaching a junction. Signs must be positioned between 100 and 150 meters from the junction along the highway, as detailed in the specified drawing and clauses.
IRC 2 illustrates typical arrow designs for use on definition plates, serving as examples that can be adapted for different scenarios. These arrows assist in indicating directions clearly, with the design principles outlined to maintain consistency and clarity.
Guidelines for assembling route marker signs at junctions are provided, ensuring clear identification of intersecting numbered routes regardless of route classification. The assembly employs appropriate shields and signs to facilitate straightforward navigation at intersections.
The reverse side of all route marker signs should be painted in an unobtrusive grey (Indian Standard Colour No. 630). Sign posts are to be painted in alternating 25 cm bands of black and white, starting with black at ground level, enhancing visibility and standardization.
This part details the specifications for materials used in numerals and signs, including precise dimensional tables for 20 cm high numerals and their spacing. The size, shape, and spacing must conform to designated figures and plates to ensure standardized representation.
Detailed millimeter measurements for 20 cm high numerals are provided, covering multiple dimension parameters. Spacing between numerals varies by code number and is defined to guarantee clear, legible numerals on signage.
Instructions for the proper erection of National Highway route marker signs are described, including layouts and positioning shown in official drawings. It also covers assembly procedures at junctions to ensure correct installation and visibility.
This section outlines specifications for confirmatory route markers, placed regularly along routes and after major junctions to reassure drivers. It emphasizes the use of standardized symbols, route numbers, and visibility features such as size and color.
The 1968 edition converted all dimensions to metric units (millimeters) to align with India's metrication policy. Tables specifying numeral dimensions and other measurements are presented exclusively in millimeters, ensuring clarity and uniformity.
Frequently Asked
While the provided text does not explicitly list the colors, National Highway route marker signs typically feature a Canary Yellow background (IS Colour No. 309) with black borders and lettering for maximum visibility and standardization.
Although specific materials are not directly mentioned, it is standard practice to use durable metals like aluminum or steel for both sign panels and posts due to their robustness and weather resistance. Posts are painted in alternating 25 cm black and white bands with the bottom band black, and the rear of signs is painted in unobtrusive grey (IS Colour No. 630).
IRC 2 mandates that route marker signs be placed between 100 to 150 meters away from a junction along the National Highway on either approach side. The sign should be mounted on the left side of the road when approaching the junction to maximize visibility.
For 20 cm high numerals, the code provides exact measurements in millimeters for various parts of the numerals, such as 'a', 'b', 'c', 'e', and 'f'. Spacing between numerals is defined by code numbers and must conform to specified figures and plates to ensure legibility and uniformity on signage.
At intersections, the route marker sign of the intersecting numbered route should be placed ahead of the junction on the same post as the National Highway marker. This assembly includes a definition plate with directional arrows indicating the route directions, providing clear guidance to road users.
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