The $18.5-billion capital investment plan also includes funds for MBTA power system upgrades, a multimodal transportation project, interchange improvements and bridge projects.
Maintenance and repair work is planned for two spans linked to mainland Massachusetts while designs for their estimated $4-billion replacements move forward.
Three tidal turbine energy developers, including one U.K. company, are planning to test their prototypes at the world’s first-of-its-kind permanent tidal test site on the Cape Cod Canal in Massachusetts.