A new kind of bus is set to make its debut in Île-de-France. Named the Tzen 4, this 24-meter-long, fully electric bus is planned to replace the current Line 402 over a 14-kilometer route in Essonne. Claimed as a world first, the deployment of this “bi-articulated bus” is scheduled for Tuesday, February 10, 2026, according to our colleagues at Le Parisien.