This paper represents the first major fruits of my research project into the politics of transit infrastructure. Written for my Transportation History course, APLN 543, it covers the politics and background behind Center City Philadelphia’s commuter tunnel. It’s a rough draft that will, eventually, make up just part of a longer research project; feedback is welcomed. If you know of any key sources I missed or have an alternative explanation for any of my analysis, get in touch with me! And enjoy. Questions welcomed.