Investigation on the Time Factor of CO-Based Emission Factors for Sustainable Development of Urban Tunnels in China

Table 3

The prediction and accuracy check results of passenger cars during 2015∼2030 in China.

Year	EFCO g/(km·veh)	Mean relative residual error	Absolute correlation degree ζ	Mean square errors ration C	Small probability error P	Accuracy grade
2015	0.93	0.0311	0.9990	0.0544	1	II
2016	0.75	0.0197	0.9985	0.0530	1	II
2017	0.66	0.0165	0.9978	0.0383	1	II
2018	0.57	0.0147	0.9987	0.0471	1	II
2019	0.49	0.0140	0.9995	0.0510	1	II
2020	0.41	0.0147	0.9992	0.0492	1	II
2021	0.36	0.0103	0.9982	0.0234	1	II
2022	0.31	0.0073	0.9996	0.0209	1	II
2023	0.26	0.0074	0.9992	0.0203	1	I
2024	0.23	0.0069	0.9989	0.0196	1	I
2025	0.19	0.0066	0.9991	0.0239	1	I
2026	0.17	0.0048	0.9995	0.0120	1	I
2027	0.14	0.0039	0.9991	0.0077	1	I
2028	0.12	0.0035	0.9993	0.0103	1	I
2029	0.10	0.0028	0.9995	0.0108	1	I
2030	0.09	0.0031	0.9995	0.0104	1	I