In recent years, with the development of urban clusters in China, intercity metro construction has witnessed a boom, linking multiple cities through rail transit and further promoting regional integration. On September 18, Guangzhou Metro announced the planning information for the second phase of Dongguan Metro Line 1 within Guangzhou's territory, signaling that the interconnection between the two metros is about to become a reality.
In Sichuan, the first intercity rail transit line connecting Chengdu and Ziyang is about to open; previously, the Huzhou-Suzhou Metro connecting Shanghai and Suzhou, and the southern extension of Changsha Metro Line 3 connecting the Yangtze River and Xiangtan, have both been put into operation, highlighting the growing importance of intercity metros in regions like the Yangtze River Delta and Pearl River Delta.
Intercity metros not only shorten commuting times but also facilitate the free flow of economy, population, and resources within urban clusters. For instance, since the opening of the Guangzhou-Foshan Metro in 2010, the connection between Guangzhou and Foshan has become increasingly tight, with a daily commute volume reaching 1.85 million trips, accounting for 27% of the total intercity trips in the Bay Area. Similarly, the north extension of Shanghai Metro Line 11 to Kunshan strongly supports the integration of the Yangtze River Delta urban agglomeration.
Moreover, cities like Beijing and Chengdu are accelerating the construction of intercity metros, further expanding the rail transit network. The Beijing Metro Line 22 spans both Beijing and Hebei Province and is expected to be completed by 2025. The Ziyang Line between Chengdu and Chongqing further strengthens the connection within the Chengdu-Chongqing Economic Circle, as the rail transit network gradually covers wider areas.
The development of intercity metros is not just an enhancement of the urban transportation system, but also a boost to local economies. By shortening commute times and reducing travel costs, intercity metros promote economic interactions between cities and bring metro convenience to small and medium-sized cities. As the integration of rail transit continues to advance, future urban clusters will exhibit closer linkage and higher quality development patterns.
