Urban passenger transportation systems refer to the public transportation systems that exist within a city. These systems are essential for moving people from one point to another, and they often include buses, trains, subways, and light rail systems. There are several synonyms for urban passenger transportation systems, such as public transport, mass transit, commuter transport, and urban transit. These synonyms highlight the importance of these systems in ensuring that people can move around cities in a safe, reliable, and efficient manner. While these transportation systems may differ in terms of the modes of transport they utilize, they all share the fundamental goal of providing reliable transportation options for city dwellers.