A Car-Following Model Based on Quantified Homeostatic Risk Perception

Table 2

Root mean square errors of the simulation.

Case type	Case no.	Model	Speed of car 1 (m/s)		Speed of car 2 (m/s)	Relative spacing between car 0 and car 1 (m)		Relative spacing between car 1 and car 2 (m)
Speed changes a little	1	DSM	0.84		1.62	4.87		19.34
		GHR	0.86		2.37	5.33		27.33
	2	DSM	0.99		1.15	1.96		5.66
		GHR	1.10		1.03	7.64		4.89
Speed increases	3	DSM	0.62		1.13	3.65		4.78
		GHR	0.67		1.08	3.90		4.54
	4	DSM	0.84		1.31	1.92		9.30
		GHR	0.85		1.20	1.76		11.03
Speed decreases	5	DSM	1.56		1.87	5.00		5.04
		GHR	1.78		1.98	10.32		2.94
	6	DSM	1.35		1.88	3.75		4.63
		GHR	1.93		1.90	7.89		1.72
Speed changes with increasing and decreasing	7	DSM	1.33		1.32	14.53		8.92
		GHR	1.36		1.43	14.23		9.41
	8	DSM	0.88		1.33	6.49		3.63
		GHR	1.05		1.46	14.97		3.85
Average		DSM	1.05		1.45	5.27		7.66
		GHR	1.20		1.56	8.26		8.21
		DSM		1.25			6.47
		GHR		1.38			8.24