After that, Bouffort created the Chenillette, a small tracked vehicle, followed by the larger Bison. His battle to resolve urban congestion started in the 1960s. By 1968 he and his friend Henri Viard had come up with the concept for the Minima, a two-seater city car that was so small, it could park at right angles to the kerb. A working prototype was launched in 1973 but it was too far ahead of its time: there was zero interest from the industry and the project was shelved.