A twinkle in the Port Authority's eye
From which would beget the concrete vision of a spine line and eventually its vestige known as the North Shore Connector today. I do like the last line in it. The route planning anticipated some new development around Three Rivers Stadium. Which still (still??) exists.
* Yes, I know that is far from the real beginning for the North Shore Connector as it would become known. For the start you probably have to go back to 1967, or you could really argue 1923 was the real beginning, but for the concrete start of planning for the NSC as is opening now.. 1985 was the starting point.