New Hampshire Route 120 is a 26.928 mi secondary north–south state highway in Sullivan and Grafton counties in the upper Connecticut River Valley region of New Hampshire. Its southern terminus is at New Hampshire Route 11 and New Hampshire Route 103 in Claremont. Its northern terminus is at New Hampshire Route 10 in Hanover.
Route 11 is less than 30 miles long
This is correct because it is 26 miles long which is less than 30. I think the system is bad at math