Seattle World's Fair highlighted electric transportation network

Seattle’s 1962 World’s Fair was awe-inspiring. It previewed developments that would improve our daily lives in the next millennium. While “Century 21” memories have faded, three of its landmarks remain as reminders of the innovations it inspired: The Seattle Center, the Space Needle, and the monorail.

One thing many remember is “The Bubble-ator,” a glass ball-shaped elevator in the coliseum (now C...