There was absolutely nothing "trailblazaing" about the BART engineering, rather they were just completely ignorant of the world around them. The St Petersburg m

There was absolutely nothing "trailblazaing" about the BART engineering, rather they were just completely ignorant of the world around them. The St Petersburg metro had ATC and platform screen doors way back in 1961. The spread-spectrum radio research project was also a gigantic waste of taxpayer dollars (radio-based signaling was a common off-the-shelf technology by then).