SEPTA's Regional Rail Master Plan project has released
three conceptual scenarios for the network. Although any actual realized plan will probably end up as a distorted kludge of the three concepts, they are interesting exercises and this is some of the most exciting, promising thinking the SEPTA has demonstrated in a significant length of time.
SEPTA has also posted solicitations for
expressions of interest for the M5 car procurement and
a request for proposal for the streetcar procurement, replete with nearly thousand-page specification document in each case.
Quote:
Originally Posted by thoughtcriminal
Saw this cool old diagram for the original subway system design.

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I believe that this was a different schematic of
the system plan on page 127 of the 1917 report of the Commissioner of City Transit. (The actual image had very different graphical style, but I believe showed largely the same proposal) My own favorite is
the rather curious lopsided pear shaped plan from page 125 of the same report. (
The first decade of reports from the Commissioner of City Transit are fascinating, if also frustrating, documents for anybody very interested in Philadelphia transit and history to survey)