AMP: 7
Location: North Rd and Carlisle Rd, Bedford
Reassurance shield after the 225 split.
AMP: 9
Location: North Rd and Chelmsford Rd, Bedford
A couple miles later, keep left for 4 north to Chelmsford. Keep right to stay on North Rd to U.S. 3 (not Route 3) to Nashua, N.H.
AMP: 9
Location: Nashua Rd and Isabella Ln, Billerica
A quarter mile later, we’ll enter Billerica.
AMP: 11
Location: Nashua Rd and Treble Cove Rd, Billerica
Reassurance shield two miles later.
AMP: 14
Location: Boston Rd and Harvey Rd, Chelmsford
Reassurance shield after we cross into Chelmsford.
AMP: 15
Location: Boston Rd and Acton Rd, Chelmsford
As we enter downtown Chelmsford, we’ll approach Route 110 (as well as Route 27). Keep left ahead to stay on 4 north, which briefly joins 110 west.
AMP: 15
Location: Boston Rd and Acton Rd, Chelmsford
But first, turn left to get on 27 south (via a u-turn onto 4 south). Stay straight to stay on 4 north.
N to MA 110/MA 129, S to MA 62
