《Table 3 Average land-use efficiency in areas with different combinations of high-speed transportati

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《山东半岛城市群高速交通优势度与土地利用效率的空间关系（英文）》

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The preceding analysis shows there is a significant positive correlation between high-speed transportation modes and superiority index.Further analysis of the relationship between high-speed transportation modes and land-use efficiency showed that they closely related.We created different combinations of different modes of high-speed transportation and found that there is a positive relationship between land-use efficiency and the number of high-speed transportation modes（Table 3）.This is because the key factor affecting land-use efficiency is the allocation of resources.In the dynamic process we have described，high-speed transportation can positively promote resource exchange through factor agglomeration and endogenous growth mechanisms.High-speed transportation can significantly increase regional advantages，and promote aggregation at points along high-speed transportation routes or trunks to form regional growth poles.The formation of these polar cores optimizes the development of land resources.The increase in modes of high-speed transportation diversifies the allocations，so land-use efficiency becomes more optimal.Land-use efficiency of the highway+high-speed rail+air transport combination is the highest，and60%of the sample areas have the optimal value（1.000）.