The main objective of this book is to eliminate the need to consult many different and diverse sources for obtaining desired information and to provide up-to-date information on the public transportation systems. The book includes numerous exercises for senior undergraduate or graduate students in entry-level engineering. For transportation experts and researchers interested in the area, the book can also be used as a reference. The book explores organizational best practices and life-cycle assessments, outlining the sustainable aspects which might be introduced to public transportation infrastructure or ancillary facility when renovating or extending it. Through the use of physics models, the book demonstrates how to think about public transportation in a methodical way. The book explains how to do an analysis of the reliability and safety of transportation systems. The book concludes with a discussion of upcoming sustainable efforts aimed at improving public transportation.