[Grego43]

Nice plan, but my two cents are:

-Need a direct Oakland-Downtown line. That would be the busiest corridor by far, and the circuitous route between the two make it unattractive time-wise.

-Sinking LRT lines into a subway is sexy, but the huge cost v. the relatively small benefits to at-grade/elevated lines is an unnecessary expense and is probably the major reason Pittsburgh's system growth has been hamstrung. Imagine how much larger the system could be if the Downtown subway and the NS Connector were at grade or elevated (sorry to beat a dead horse). The Portland, OR system is nearly entirely at grade with only one tunnel under Washington Park because the incline was too great to cross over. Even in the CBD, the LRVs run in the traffic lanes and a few ROWs. Portland has one of the most successful systems in the US. Other comparable systems such as St Louis, San Diego, Sacramento, & Salt Lake have very few if any subways.