Developing an Enhanced Short-Range Railroad Track Condition Prediction Model for Optimal Maintenance Scheduling

Table 1

Statistics about errors in predictions by the original and enhanced models.

Geometrical parameters	Error statistics	November 13		December 12		December 25
		Enhanced	Original	Enhanced	Original	Enhanced	Original
Gauge	μ (mm)	−0.0005	0.0000	−0.0016	0.0000	−0.0021	0.0000
	σ (mm)	0.1191	0.1554	0.1299	0.3478	0.0991	0.4155
	ρ	0.9947	0.9909	0.9935	0.9547	0.9962	0.9371
Crosslevel	μ (mm)	−0.0041	0.0000	−0.0125	0.0000	−0.0163	0.0000
	σ (mm)	0.5673	0.6313	0.4478	0.7209	0.4559	0.9123
	ρ	0.9119	0.8920	0.9469	0.8702	0.9517	0.8125
Left surface	μ (mm)	0.0008	0.0000	0.0024	0.0000	0.0031	0.0000
	σ (mm)	0.4752	0.4959	0.5304	0.6909	0.4135	0.6114
	ρ	0.9452	0.9410	0.9350	0.8935	0.9609	0.9192
Right surface	μ (mm)	−0.0008	0.0000	−0.0023	0.0000	−0.0031	0.0000
	σ (mm)	0.3722	0.4044	0.4450	0.5997	0.4272	0.6210
	ρ	0.9657	0.9603	0.9539	0.9200	0.9584	0.9175
Left alignment	μ (mm)	−0.0012	0.0000	−0.0038	0.0000	−0.0050	0.0000
	σ (mm)	0.3340	0.3597	0.2761	0.4291	0.2556	0.4713
	ρ	0.9511	0.9438	0.9662	0.9225	0.9711	0.9097
Right alignment	μ (mm)	−0.0012	0.0000	−0.0035	0.0000	−0.0046	0.0000
	σ (mm)	0.3267	0.3564	0.2906	0.4291	0.2682	0.4478
	ρ	0.9284	0.9159	0.9432	0.8833	0.9525	0.8786
Twist	μ (mm)	0.0000	0.0000	−0.0001	0.0000	−0.0001	−0.0001
	σ (mm)	0.5184	0.5474	0.5696	0.7441	0.4085	0.6026
	ρ	0.9037	0.8949	0.8996	0.8347	0.9547	0.9006