Derivation of level of service by artificial neural networks at horizontal curves: a case study in Egypt

European Transport Research Review

An Open Access Journal

Table 7 Performances for the best three trials of ANNs model

Trial number	Performance	Number of Training samples	Number of Testing samples	Overall Model
1		68	10
	R²	0.931	0.894	0.928
	║δ║	0.134	0.211	0.186
2		63	15
	R²	0.996	0.965	0.993
	║δ║	0.044	0.167	0.102
3		58	20
	R²	0.882	0.863	0.879
	║δ║	0.193	0.234	0.205