Directions

DPI is about 20 miles North of Boston, Massachusetts, just off I-93.

From Boston/Logan airport

• Exit Logan Airport onto Rt-1A South.
  Go through the Sumner Tunnel and continue 1.2 miles.
  (Rt-1A is a toll road, which is also known as William F. McClellan Highway.)
• Exit onto I-93 North. Go 17 miles.
• Take exit #41/RT-125. Go a short distance to RT-125.
• Bear right onto RT-125. Go 0.1 miles.
• Turn left onto Ballardvale St.
• Turn right at the first driveway; it is the building on the right.

From South and West of Boston

• Take I-95N (also known as Route 128N) to I-93N.
• Take exit #37B onto I-93 North. Go 6.2 miles.
• Take exit #41/RT-125. Go a short distance to RT-125.
• Bear right onto RT-125. Go 0.1 miles.
• Turn left onto Ballardvale Street.
• Turn right at the first driveway; it is the building on the right.

From the North

• Take I-93S toward Wilmington, MA.
• Take exit #41/RT-125. Go a short distance to RT-125.
• Bear left onto RT-125. Go 0.5 miles.
• Turn left onto Ballardvale Street.
• Turn right at the first driveway; it is the building on the right.