Physical Geography and Land Resource
WANG Lu, XU Xiangmeng, ZHAO Jiahao, MIAO Yi
Regional transport integration serves as a key driver of regional coordinated development,making its scientific assessment and characteristic analysis highly significant.Taking the Shandong Peninsula Urban Agglomeration as an example,this study constructs an evaluation index system based on multi–source data from three dimensions:facility coverage,connectedness,and service systematization.Adopting an integrated measurement perspective of"quality–equilibrium",it analyzes the level of transport integration and its spatio–temporal evolution characteristics in the region from 2017 to 2023.It is found as follows.(1)From a dimensional perspective,facility coverage exhibited a"center–strip–scatter"distribution pattern with significantly narrowed inter–county disparities;connectedness developed rapidly with concentrated high–value areas;service systematization experienced fluctuations during the pandemic but overall demonstrated an accelerating and improving trend.(2)At the urban agglomeration scale,the level of transport integration increased markedly,transitioning from rapid to stable growth,and spatially formed a point–axis diffusion pattern centered around the Jinan–Qingdao dual core and supported by key metropolitan areas and transport corridors.However,significant spatial heterogeneity remained in the degree and type of integration at the prefectural–city level. (3)The evolution of transport integration showed improved equilibrium but notable quality divergence.In 2023,both Qingdao and Jinan were classified as"high–quality synergistic"types,while the vast majority of prefecture–level cities were in or entering a"low–quality equilibrium"predicament.Heze exhibited"dual lag"and required comprehensive improvements across multiple aspects.(4)In terms of correlational relationships,the driving effect of facility coverage on transport integration has weakened,while connectedness has gradually become the key factor.Addressing issues such as cross–scale transport linkage imbalances,urban–rural disparities in transport services,and the"single–point collapse"of high–level facility coverage in peripheral areas will be critical for future development.Finally,suggestions are proposed for optimizing intercity and urban–rural transport layouts,with the aim of providing reference for promoting regional transport integration in urban agglomerations and other areas.