yea but doesnt Amtrak do that already?
But Amtrak's service is aimed more at intercity travel, than commuter/travel. The current Inland Route service doesn't run frequently enough for most commuters to, from and between New Haven, Hartford and Springfield to use. That's where the commuter rail service comes in.
Also New Haven and Hartford are planning a BRT route that would run between both cities. The MNRR goes to New Haven. You can board an MNRR train and get off at New Haven before boarding a bus to Hartford. That is a cheaper way to travel than Amtrak.
The BRT route is planned to run between Hartford and New Britain
, not New Haven. The BRT route won't connect to Metro-North, because New Britain and New Haven are far from each other.