Correction 7/25/24 7:55 a.m. ET: The map caption for this story has been updated to note USHSR's proposed high-speed rail network would be 17,000 miles long, not 7,000 as initially stated.

The plan features improvements across the T, including upgrades to the infrastructure on Framingham/Worcester Commuter Rail line that would eventually allow for trains to run every 30 minutes.