| Summary: | In order to analyse the main influencing factors of civil aviation passenger transport volume in multi Airport area. Correlation analysis, stepwise linear regression analysis and Grainger causality test were used to analyse the influence factors of civil aviation passenger traffic volume, to eliminate the invalid factors, a regression model is established to analyse the causal relationship between the various factors and air passenger volume. Through the analysis of the Yangtze River Delta region, it is concluded that the number of inbound tourists, the railway mileage and the volume of railway passenger transport are the main factors affecting the Yangtze River Delta region. Through the Grainger causality test, the air passenger volume of the Yangtze River Delta has one-way influence on the railway passenger traffic volume.
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