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区域公路交通投资与经济增长之间相互影响的课题是交通领域中未解决的问题之一。基于格兰杰因果关系检验的基本原理与回归分析方法建立数学模型研究区域公路交通投资与经济增长之间的内在依存关系。经济发展的不同阶段,区域的公路交通投资与GDP总量之间均存在着互为因果关系。相同阶段经济增长与公路交通投资的相互之间推动作用不同。1978年以后经济增长对公路交通投资的推动作用由1978年前的118%下降到1978年后的48.2%。1978年后公路交通投资对经济增长的推动作用由1978年前的14.8%上升到1978年后的30.5%。
The issue of the interaction between regional road traffic investment and economic growth is one of the unresolved issues in the transport sector. Based on the principle of Granger causality test and the regression analysis method, a mathematical model is established to study the interdependence between regional highway traffic investment and economic growth. In different stages of economic development, there is a causal relationship between the regional road traffic investment and the total GDP. The same stage of economic growth and road transport investment promote each other a different role. After 1978, the promoting effect of economic growth on road traffic investment dropped from 118% before 1978 to 48.2% after 1978. After 1978, the contribution of highway traffic investment to economic growth rose from 14.8% before 1978 to 30.5% after 1978.