Here’s an interesting map that shows a plan for rapid transit that city engineers envisioned for Seattle way back in 1920, almost 100 years ago!

The map shows a subway running beneath Third Avenue from Virginia to Yesler, coming to the surface near the railroad stations – essentially the route followed by the present-day Downtown Seattle Transit Tunnel. Trains going up to Capitol Hill would follow a line up Pine Street that would be alternately underground and elevated, ending at 15th Avenue East. An elevated line would serve Pigeon Point in West Seattle, while surface rapid transit would connect with the existing streetcar service at stations in Fremont, lower Queen Anne, and the University District.

Source: Seattle Municipal Archives/Flickr