Quickly find out when the next MBTA subway train will be arriving at your stop. Provides real-time arrival info down to the second. This MBTA tracker includes support for the Orange line, Red line, and Blue line on the MBTA subway system in Boston, Cambridge and surrounding areas. When taking the Boston subway, this MBTA app will make your commute much better. You can now time your commute to perfectly line up with the MBTA schedule so you never need to stand around waiting at the station. Show up exactly when the train does. Taking the Boston T becomes much less stressful when you know you won't be waiting forever for the next train to arrive. Note that real time info for the MBTA Green line is not supported by any MBTA app due to the age and technical limitations of the train tracks it uses. The Green line will not be supported in the near future.