New Hampshire Route 78 (abbreviated NH 78) is a 3.456 mi secondary state highway in Cheshire County in the southern part of the U.S. state of New Hampshire. A northward extension of Massachusetts Route 78, NH 78 runs entirely within the town of Winchester from the state border to downtown, where it ends at New Hampshire Route 10 and New Hampshire Route 119.
Route 119 connects to Massachusetts.
Nothing in the context suggest that route 119 connects to Massachusetts. Only that it is at the end of NH 78. I believe the system got it wrong because the context stated northward extension of Massachusetts route 78 ended at route 10 and 119.