The normal top speed nowadays is 40mph and you would see that mostly south of the city. There is work being done to (optimistically) allow 50mph in some sectio

The normal top speed nowadays is 40mph and you would see that mostly south of the city. There is work being done to (optimistically) allow 50mph in some sections in the future. https://www.wbur.org/news/2024/07/19/mbta-red-line-closure-braintree-branch-50-mph-trains-newsletter https://www.wbur.org/news/2024/07/19/mbta-red-line-closure-b...