Units of information on dynamic message signs: a speed pattern analysis

European Transport Research Review

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Table 3 Descriptive statistics and ANOVA of different phases by units of information

Information on DMS		N	Mean Speed (mph)	Std. Deviation	F	Sig
6–7 units	Initial Speed	54	39.98	7.88	0.301	0.877
	Visible Area	54	38.9	7.76
	Readable Area	54	38.51	8.25
	Lost legibility	54	38.47	8.56
	Post DMS Area	54	38.94	8.31
5 units	Initial Speed	41	39.21	3.84	0.693	0.598
	Visible Area	41	38.95	2.88
	Readable Area	41	38.32	3.37
	Lost legibility	41	38.08	5.14
	Post DMS Area	41	38.16	3.78
4 units	Initial Speed	77	39.14	4	0.902	0.463
	Visible Area	77	38.5	3.48
	Readable Area	77	38.53	4.25
	Lost legibility	77	38.88	4.86
	Post DMS Area	77	39.62	4.74
2–3 units	Initial Speed	124	39.84	7.48	6.745	0.000*
	Visible Area	124	38.68	7.61
	Readable Area	124	38.48	8.01
	Lost legibility	124	43.74	8.38
	Post DMS Area	124	43.96	8.17