When Bay Area Rapid Transit (BART) first carried passengers, the country was sending astronauts to the moon. The Apollo-era trains were symbols of a generation barreling toward a space-age future complete with carpeted floors and a seat promised to every passenger. That was 1972, when BART was state-of-the-art. But half a century later — as the agency celebrates its 50th anniversary this month — many of those same silver-and-blue trains are still chugging through the Bay Area. And keeping them running — even in the country’s technology capital — requires a special breed of ingenuity. BART mech…
