Viewing Times And Distances

VIEWING DISTANCES		VIEWING TIMES

Character Height	Reading Distance in Feet	20 MPH	25 MPH	30 MPH	35 MPH	40 MPH	45 MPH	50 MPH	55 MPH	60 MPH	65 MPH
3"	150	5.11	4.09	3.41	2.92	2.56	2.27	2.05	1.86	1.70	1.57
4"	200	6.82	5.45	4.55	3.90	3.41	3.03	2.73	2.48	2.27	2.10
6"	300	10.23	8.18	6.82	5.84	5.11	4.55	4.09	3.72	3.41	3.15
9"	450	15.34	12.27	10.23	8.77	7.67	6.82	6.14	5.58	5.11	4.72
10"	500	17.05	13.64	11.36	9.74	8.52	7.58	6.82	6.20	5.68	5.24
11"	550	18.75	15.00	12.50	10.71	9.38	8.33	7.50	6.82	6.25	5.77
12"	600	20.45	16.36	13.64	11.69	10.23	9.09	8.18	7.44	6.82	6.29
18"	900	30.68	24.55	20.45	17.53	15.34	13.64	12.27	11.16	10.23	9.44
24"	1200	40.91	32.73	27.27	23.38	20.45	18.18	16.36	14.88	13.64	12.59
30"	1500	51.14	40.91	34.09	29.22	25.57	22.73	20.45	18.60	17.05	15.73
36"	1800	61.36	49.09	40.91	35.06	30.68	27.27	24.55	22.31	20.45	18.88
48"	2400	81.82	65.45	54.55	46.75	40.91	36.36	32.73	29.75	27.27	25.17
60"	3000	102.27	81.82	68.18	58.44	51.14	45.45	40.91	37.19	34.09	31.47
72"	3600	122.73	98.18	81.82	70.13	61.36	54.55	49.09	44.63	40.91	37.76

Character height is one of the most important size parameters. The general rule used to approximate character height is to allow one (1) inch of character height for each 50 feet of distance. The display should be sized to allow the optimum viewing time of 12-20 seconds at the normal traffic speed.

All distances shown are given in seconds for each mile per hour rate.