Radiation Effect of Urban Agglomeration’s Transportation Network: Evidence from Chengdu–Chongqing Urban Agglomeration, China

Abstract

Recent years have seen the global proliferation and integration of transportation systems in urban agglomeration (UA), suggesting that transportation networks have become more prominent in the sustainable development of UA. Core cities play a radiating and driving role in affecting their adjacent cities to formulate transportation networks. Such a phenomenon is called the radiation effect of transportation networks and can be imaged using a field strength model as proposed in the study. The field strength model was verified using the Chengdu–Chongqing urban agglomeration (CCUA) as a case. Case data concerning transportation routes and traffic volume were collected for the past 20 years. The data analyses results indicate a relatively stable pattern of transportation networks in the UA. UA cities’ radiation effects follow the same compactness trend. The core cities’ radiation spheres go beyond their territories, and they can envelop the surrounding cities, highlighting the core cities’ dominance in the entire transportation network. Moreover, two development stages of UA transportation—focus and spillover—are also identified. This study contributes to the literature by providing an innovative quantitative method to detect the interaction between a city’s transportation system and peripheral cities or regions. The radiation effect of cities’ transportation systems should be considered in the UA transportation development plan, so as to meet the needs of spatial structure planning and coordinated development of the UA.

Analysis and Optimization of Residential Elements from the Perspective of Multi-Child Families in the Yangtze River Delta Region

“…Using word frequency screening, interviews, expert consultation, clustering techniques, and other methods, this study further screened the residential elements that impact the life of multi-child families in order to thoroughly analyze the root problems encountered by multi-child families (Figure 2). To start with, this study draws on the consensus reached by Changlian Zhu, Hao Long [40], Renlu Hu, Zhou Yanmin [41], Fang Xianfu, and Yao Shizhang [42] as the basic framework. Next, the study conducted online interviews with 95 multi-child families for the purpose of its preliminary research, identified the factors influencing their housing, and conducted the first round of expert consultation (15 experts) to summarize their characteristics, categorizing residential elements into three major categories: flat layout, flat public areas, and residential areas.…”

The External Characteristics and Mechanism of Urban Road Corridors to Agglomeration: Case Study for Guangzhou, China

“…From 1950 to the present, theories on the interaction between urban roads and urban society and other elements mainly focused on the biological environment and landscape [1][2][3][4][5][6], urban agglomeration and urbanization [7][8][9][10][11][12], industrial transformation [13][14][15][16], land agglomeration use [17][18][19][20][21], real estate development [22][23][24][25][26][27][28], location [29][30][31][32][33][34][35][36][37], mixed land use [38][39][40][41], and property right [42,43]. Based on quantitative models, scholars have conducted a lot of research mainly on the interaction between economy, social demand [44,45], land and transportation [46].…”

The Mechanisms of the Transportation Land Transfer Impact on Economic Growth: Evidence from China

“…The network layout of transportation land leads to a more rapid circulation of passenger flow, logistics, capital flow, information flow, and other resources and services in the network within and between cities. This is due to the powerful aggregation and release effect, which changes modes of consumption, life, and production and has thereby profoundly affected the economic operation of the city [39,40].…”