Stuttgart's "Cool" Station: Climate Gamble?

Stuttgart's subterranean railway megaproject, known as Stuttgart 21, is designed to operate without air conditioning, a detail surprising to residents amid recent heatwaves. Rail operator Deutsche Bahn (DB) asserts the underground location and tunnel airflow will maintain stable temperatures. This air-conless approach aims to significantly reduce the railway hub's carbon footprint. However, critics question its efficacy, citing potential heat from trains and passengers, and referencing similar issues in other European stations like Barcelona Sants and Lisbon Metro. The project, initiated in the late 1980s and under construction since 2010, has encountered numerous setbacks, including protests over tree felling and the costly relocation of protected lizards. An internal audit revealed further challenges, pushing the phased opening to 2027 and inflating the budget to €14.5 billion. Concerns also extend above ground, with fears that developing the former rail yard, now earmarked for a new district, will restrict vital fresh air corridors and worsen Stuttgart's urban heat island effect. Despite these controversies, the project promises reduced travel times and better connectivity, potentially encouraging more train travel.

DB emphasizes the efficiency of the new eight-platform through station compared to the old terminal, anticipating a significant increase in passenger numbers. They assert its performance was proven in a 2011 stress test, capable of handling "significantly more" train traffic. Digitalization is also expected to aid efficiency. The project aims to integrate the southwest of Germany into a wider train system, with journey times dramatically cut, such as Ulm-Stuttgart falling from 58 to 28 minutes. Critics, however, point to the reduced platform count as a potential safety concern, leaving little buffer for delays. DB maintains that the new station's operational capacity and direct regional connections will ultimately relieve pressure on existing infrastructure.