Bilingual signboard legibility
A vocational training centre in Bhubaneswar commissions a 2.4 m x 0.9 m signboard for its gate, to be read by pedestrians at 15 m and by drivers on a 30 km/h road. The board must carry the institute's name in Odia and English, a tagline, and a phone number. The fabricator's draft sets the English name in a condensed all-caps sans serif stretched to fill the width, the Odia name in an ornate display face with hairline strokes, and the tagline in 40 mm letters. The phone number is placed at the bottom in 25 mm digits. The fabricator says bigger is better and wants to remove the space between the two lines to fit everything.
1. Evaluate the draft for legibility at 15 m, referring to letter height, stroke width, all caps, and condensed width.
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At 15 m, 40 mm tagline letters subtend a small angle; the practical rule for signage is about 1 cm of cap height per 3 m of viewing distance, so 15 m needs roughly 5 cm minimum, and 4 cm is marginal before factoring in motion and glare. The 25 mm phone digits are too small. The condensed all-caps English forces narrow counters and removes word-shape cues; all caps slows reading of the institute's name because we recognise words by outline and ascenders. The ornate Odia face's hairline strokes will fill in or disappear through irradiation and poor edge contrast. Stretching type horizontally distorts stroke modulation. Removing line space will cause the two scripts to collide visually.
2. Propose a typographic specification: typeface qualities, sizes, spacing, and alignment.
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Specify the English name in a medium-weight humanist sans at 15-18 cm cap height, sentence case or small caps, normal width, tracking 0 to +20. Set the Odia name in a bold, open-counter Odia typeface at the same cap height, not a decorative display face. Set the tagline at 8-10 cm and the phone number at 10-12 cm with clear digit grouping. Put both names on separate lines with at least 8 cm between baselines; do not stretch. Left-align on one vertical axis so the eye scans name, tagline, phone. Use dark text on a light ground, or the reverse, at high value contrast.
3. What proofing test should be used before fabrication?
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Proof at 1:10 scale and view from 1.5 m; that is equivalent to 15 m. Alternatively photograph a mock-up from 15 m and blur it slightly; if the phone number is not readable, increase it. Check in daylight and at night.