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GENERAL RULE: Bigger is BETTER. Many
things determine the visibility of your sign. The font, weather, traffic,
and illumination will all play factors. So when in doubt, go bigger.
General
Visibility Chart |
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Use this chart
as a general guideline in figuring out what size sign you need. |
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Letter Height |
Recommended Distance |
Maximum Readable Distance |
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3" |
30' |
75' |
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4" |
40' |
100' |
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6" |
60' |
150' |
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8" |
80' |
200' |
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9" |
90' |
225' |
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10" |
100' |
250' |
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12" |
120' |
300' |
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15" |
150' |
375' |
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18' |
180' |
450' |
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24" |
240' |
600' |
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30" |
300' |
750' |
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36" |
360' |
900' |
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42" |
420' |
1050' |
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48" |
480' |
1200' |
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54' |
540' |
1350' |
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60" |
600' |
1500' |
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Calculations are based on
externally (or naturally) lit sign with all uppercase Helvetica Letters
utilizing negative space. Factors that may affect required letter size are:
color scheme, font selection, traffic, and weather conditions or sign
standoff.
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Visibility Chart in Respects to
Speed and Viewing Time |
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Use this chart as a general
guideline in figuring out what size sign you need if your viewers will be
driving or moving by your sign. |
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Character Height in Inches |
Reading Distance in Feet |
Speed on Street or Highway
Where Signage is Located |
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20 MPH |
30MPH |
40MPH |
50MPH |
60MPH |
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(Viewing Time in Seconds) |
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18 |
900 |
30.68 |
20.45 |
15.34 |
12.27 |
10.23 |
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20 |
1000 |
34.09 |
22.73 |
17.05 |
13.64 |
11.36 |
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22 |
1100 |
37.50 |
25.00 |
18.75 |
15.00 |
12.50 |
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24 |
1200 |
40.91 |
27.27 |
20.45 |
16.36 |
13.64 |
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28 |
1400 |
47.73 |
31.82 |
23.86 |
19.09 |
15.91 |
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30 |
1500 |
51.14 |
34.09 |
25.57 |
20.45 |
17.05 |
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36 |
1800 |
61.36 |
40.91 |
30.68 |
24.55 |
20.45 |
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42 |
2100 |
71.59 |
47.73 |
35.79 |
28.64 |
23.86 |
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The chart above is designed to
help in determining the correct letter height to obtain a minimum of 15
seconds of viewing time. |
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NOTE: The feet traveled per second
is indicated in the 2nd column above. The data in the 3rd through the 7th
column is viewing exposure in seconds for moving vehicles. |
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SCHAD TRACY SIGNS,
INC. Copyright ©
2007 [SCHAD TRACY
SIGNS]. All rights reserved. Revised:
01/04/07
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