A New GNB Model of Crash Frequency for Freeway Sharp Horizontal Curve Based on Interactive Influence of Explanatory Variables

Table 6

Statistics values of predicted and real crashes.

	Obs	Average	Std. Dev	Min	Max
	(the sample number)
The real crashes	88	3.31	2.87	0	15
Prediction result of model 1	88	3.30	1.11	2.38	7.39
Prediction result of model 3	88	3.60	1.44	2.16	10.73
Prediction result of model 6	88	3.38	1.82	2.16	15.13