U.S. Route 3, MA 40 to MA 4

AMP: 86

Location: Northwest Expy and Groton Rd, Chelmsford

Just after Route 40, we’ll approach Route 4.

AMP: 85

Location: Northwest Expy and North Rd, Chelmsford

Trucks are not allowed to use Route 4 south as a bypass to get to I-495 south.

AMP: 85

Location: Northwest Expy and North Rd, Chelmsford

1/2 mile to Route 4.

AMP: 85

Location: Northwest Expy and North Rd, Chelmsford

Exit for Route 4, which heads north to North Chelmsford and south into Chelmsford.

S to MA 110, N to MA 113

N to MA 3A, S to I-495

W to MA 119/MA 225, E to MA 3A