Prediction of Highway Tunnel Pavement Performance Based on Digital Twin and Multiple Time Series Stacking

Table 2

Extraction results of time series feature.

Sample	IRI (m/km)					Maintenance status					Year
	t−5	t−4	t−3	t−2	t−1	t−1	t−2	t−3	t−4	t−5
0	2.84	2.23	3.14	3.37	2.83	Natural decay	Overhaul	Minor repair	Natural decay	Overhaul	2015
1	2.23	3.14	3.37	2.83	3.56	Overhaul	Minor repair	Natural decay	Overhaul	Minor repair	2016
2	3.14	3.37	2.83	3.56	3.77	Minor repair	Natural decay	Overhaul	Minor repair	Natural decay	2017
3	3.37	2.83	3.56	3.77	3.22	Natural decay	Overhaul	Minor repair	Natural decay	Minor repair	2018
4	2.83	3.56	3.77	3.22	3.20	Overhaul	Minor repair	Natural decay	Minor repair	Minor repair	2019