What improvement has the Transit Authority made to enhance passenger comfort on subway rides?

The choice of "Welded rail joints" may seem relevant to the overall functionality and safety of the subway system, but it does not directly enhance passenger comfort during rides.

The improvement that significantly enhances passenger comfort on subway rides typically involves environmental factors within the train cars or stations. Upgrading heating systems or improving ventilation systems would directly impact how comfortable passengers feel in terms of temperature regulation and air quality. These modifications can reduce the discomfort related to a stuffy or overly hot environment, which is crucial in maintaining a pleasant experience for commuters.

While additional seating can also improve passenger comfort, it is less commonly implemented due to space constraints in many subway systems. Instead, focusing on heating and ventilation systems effectively addresses the immediate concerns of rider comfort regarding air flow and temperature, making travel more enjoyable overall.