The BART history department has a few articles. Some legacy cars have gone to odd museum-like installations. The original seats were foam inside, which proved not be as flame-retardant as thought. The upholstery was changed twice, since removing it for dry cleaning started to seem a little crazy. Etc.
BART history says it was the first new transit system since the early 20th century, so they went for space age, adjusted:
- Sundberg-Farar out of Detroit designed it inside and out, with legendary Syd Mead (Star Trek, Blade Runner) consulting for drawings and concepts. He wanted the front to look like transit, not streamlined. Inside it was to be human-centered and better than an automobile or jet plane. Mead's interview, at an advanced age, is fairly loopy, and does not say what was not human-centered about a NYC subway car.
- Aluminum, so wide gauge for stability. The aerospace industry is great on the West Coast. Big windows.
- So many early problems. Ordered the wrong mix of middle cars and cab cars.
- Not as far out as Braniff airline interiors and uniforms, in Texas. But Braniff did not design the airframe.
The cornucopia of Bay Area transit shows people prefer rail (or cable car) to even the best buses. I never heard anyone there say they preferred a bus.