AMP: 10
Location: Groton Rd and Tyngsboro Rd, North Chelmsford, Chelmsford
Reassurance shield as Route 40 begins.
AMP: 9
Location: Groton Rd and Main St, Chelmsford
Less than a mile later, we’ll approach U.S. 3, though not for another quarter mile or so.
AMP: 9
Location: Groton Rd and Lynn Ave, Chelmsford
Turn right in a couple blocks (not the next right) for US 3 north. Stay straight for US 3 south.
AMP: 9
Location: Groton Rd and Scotty Hollow Rd, Chelmsford
BGS cutout junction 3 ahead.
AMP: 9
Location: Groton Rd and US 3, Chelmsford
Exit right for US 3 north to Tyngsboro and Nashua, N.H.
AMP: 9
Location: Groton Rd and US 3, Chelmsford
Turn left for US 3 south to Burlington.
