Jean Bertin

Jean Henri Bertin was a French scientist, engineer and inventor who is best known as the lead engineer for the French experimental Aérotrain mass transit system.

Via: The test track, however, is still there, north of Orléans. Kilometers of concrete on nearly 900 pillars, rising above the fields, where no train will ever pass again. https://x.com/CeJour_Histoire/status/2090084124598182037