This book examines the main components affecting the viability of a public-transport service from both the passenger and agency perspectives, and offers solutions to well-known problems in the field. This second edition establishes a bridge between the world of practitioners and the world of research and academia. It presents new material on the design of network of routes, reliability and scheduling, coordination and connectivity, operational strategies and tactics, and new topics such as passenger behavior, multi-vehicle operations, multi-agent transit systems, and transit automation.