NE born and raised and one who has driven the I-95 trail way too many times...
Best way..
95/NJTP to Perth Amboy...I- 287 West, swings way around NJ, NYC and the southern Conn).. and a lot of $$$TOLLS...
Stay on I-287 over the Hudson at NYACK, NY....
Cross Hudson, stay on I-297 and get off at SAW MILL PARKWAY, North...
Stay on SAW MILL Parkway until you connect with I-684, NORTH..stay on I-684 until you connect with I-84 EAST towards Danbury. ( From SOMD to Danbury takes me 5 maybe 6 hours...)
Stay on I-84 until you hit the MASS PIKE aka I-90..EAST,...
Exit on I-495 , head NORTH....Exit on I-93 NORTH to Manchester ( where my father lives)...
Follow I-93 and exit ESAT onto Rt. 101.
Should take you..3-3.5 hours from Danbury, CT to Manchester, NH.
My dad taught me this after all the bottle necks in NYC and So. CONN.
I am driving up to RI this week and will taking that same route with a change after I hit Hartford, CT.
I-95 is not longer the BEST way to get to NE..unless you leave here at 11PM and drive all night to miss the INSANE daytime traffic in and around NYC!!!
check this out on a map and it may look longer, but it is faster...esp Saw Mill Parkway..No trucks!!!