Google partnered with the MTA on a pilot program that involved using sounds recorded on smartphones attached to trains to detect track issues before they occur.

Meanwhile, retail above ground in Grand Central Terminal is returning to pre-pandemic levels — when all of the landmark train station’s retail locations were occupied — the MTA announced ...

Chicago’s transit system, by comparison ... The MTA chose the A line because its cars go above and below ground. It also has areas with new construction, which provided a baseline for the ...