> The BART rolling stock set new standards as well. These were the first rapid transit rail cars to use big picture windows, carpeting in lieu of tile, to provi

> The BART rolling stock set new standards as well. These were the first rapid transit rail cars to use big picture windows, carpeting in lieu of tile, to provide cushioning for sound and sight, no overhead storage bins, no station advertising and no smoking in any of the cars, which reduced ventilation costs by $1000 per car and lowered the car's profile by 12 inches (ventilation is taken through the window sills). This is in the 1960s too, so before the anti-smoking movement had any real wins. In retrospect, it’s crazy that smoking was ever as widespread as it was in buildings, looking at its ventilation impacts. Perhaps an underrated driver for why smoking bans succeeded could be the increasing requirements of mechanical ventilation for modern buildings and vehicles, making the monetary benefits of stopping smoking more immediately compelling for infrastructure managers. I think it’s also underrated that smoking bans wouldn’t have made much sense until burning of wood and coal to heat buildings stopped - many wood and coal fireplaces and furnaces let out far more secondhand smoke into the building interior and exterior than tobacco smoking could ever hope to match.