Passenger buses are large vehicles designed to transport groups of people. They typically have multiple rows of seats and can carry anywhere from a few dozen to over a hundred passengers. Buses are commonly used for public transportation in cities, as well as for long-distance travel between towns and cities. These vehicles are powered by diesel or alternative fuels and are equipped with features for passenger comfort, such as air conditioning and restrooms. Many cities operate public transit systems that include buses, making them an essential part of urban mobility and reducing traffic congestion.