The 508-km Mumbai-Ahmedabad bullet train corridor will have 14 traction substations across Gujarat and Maharashtra to ensure a reliable power supply. The first substation at Bilimora in Gujarat. It started as a Japanese high-speed rail project. After friction, it has evolved into a hybrid model: Japanese infra, European signal systems, Indian. The Mumbai-Ahmedabad bullet train aims for a late 2027 launch, featuring India's first undersea rail tunnel and an underground station.