Mich. Admin. Code R. 408.42230 - Letter style and size

Rule 2230.

(1) A letter shall be block style and upper case for the top panel and upper or upper and lower case for the bottom panel. Letters and numbers shall be legible.

(2) Letter size shall be determined by the length of the message and the maximum visibility and readability. Table 2 shall be used as a guide for the minimum letter height at a safe viewing distance.

(a) The spacing of letters and words shall not reduce legibility.

(b) The height of a letter that is more than 5 inches (125 millimeters) high shall be increased by an additional 1 inch (25 millimeters) for each 35 feet (10.5 meters) of viewing distance.

(3) Table 2 reads as follows:

MINIMUM HEIGHT OF LETTERS		VIEWING DISTANCE
Inches	Millimeters	Feet	Meters
5	125	201 - 250	60.3 - 75
4 1/2	113	151 - 200	45.3 - 60
4	100	121 - 150	36.3 - 45
3 1/2	88	106 - 120	31.8 - 36
3	75	91 - 105	27.3 - 31.5
2 1/2	63	76 - 90	22.8 - 27
2	50	61 - 75	18.3 - 22.5
1 1/2	38	41 - 60	12.3 - 18
1	25	31 - 40	9.3 - 12
3/4	19	21 - 30	6.3 - 9
1/2	13	10 - 20	3-6
1/4	6	Less than 10	3

Notes

Mich. Admin. Code R. 408.42230

1995 AACS; 2001 AACS