All known executed Transportation Access Plan Agreements (TAPA) for large developments have been made available on Boston Transportation Department's website:
https://www.boston.gov/departments/transportation/transportation-development-review.
If you've noticed a TAPA missing, let us know about it here.
NOTE: TAPAs are legal agreements between large developments over 50,000 square feet and the Boston Transportation Department. They are part of the large development review process to mitigate the impact of a development on the transportation network. If a development is less than 50,000 sq ft, a TAPA is not required.