Directions From Boston:
For those traveling from other destinations in the Boston area, an alternative route is to take Route 2 West to I-495, then I-495 North for 3 miles to exit 31, Route 119. Take 119 West (which is also Great Road) heading towards Groton. MSI is on the right after one third of a mile.

Directions From the South (Mass Pike and Worcester):
For those traveling from other destinations south and west of MSI, take I-495 North to exit 31. Take 119 West (which is also Great Road) heading towards Groton. MSI is on the right after one third of a mile.

Directions from Manchester Airport:
From Manchester Airport, follow the signs to I-293 (not I-93). Take I-293 North for a short stretch across the Merrimack River. Take the exit for the Everett Turnpike South towards Merrimack and Nashua. The Everett Turnpike is a toll road (the toll is 75 cents). Just before you cross the state line the road becomes US-3 which you take to the I-495 exit. Take I-495 South to exit 31 which is the first Littleton exit. Take 119 West (which is also Great Road) heading towards Groton. MSI is on the right after one third of a mile.

Directions From Boston's Logan Airport:
From Logan, the easiest route is to take I-93 North. On leaving the airport take the Sumner Tunnel to Boston. Immediately on leaving the tunnel, take the I-93 North ramp. After about twenty miles on I-93, take I-495 South to exit 31 which is the first Littleton exit. Take 119 West (which is also Great Road) heading towards Groton. MSI is on the right after one third of a mile.

Directions from Providence's TF Green Airport:
From TF Green Airport follow the signs to I-95 North. Take I-95 North to I-495 North. Take I-495 North to exit 31, which is the Littleton exit. Take 119 West (which is also Great Road) towards Groton. MSI is on the right after one third of a mile.