Interchange |
Milepost |
New Exit Number |
Old Exit Number |
|
72.0 |
72A** |
25A |
|
72.0 |
72B** |
25B |
|
72.9 |
73 |
26 |
Concord
Rd - Billerica, Bedford
|
76.1 |
76 |
27 |
Treble
Cove Rd - N. Billerica, Carlisle
|
77.5 |
78 |
28 |
|
79.7 |
79 (80)* |
29
|
Lowell
Connector (NB)
|
81.2 |
80 (81A)* |
30B
|
|
81.2 |
81A (81B)* |
30A
|
|
81.2 |
81B (81C)* |
30C
(30B SB)
|
|
81.5 |
81C (82)* |
31
|
|
83.7 |
84 |
32
|
|
85.8 |
86 |
33 |
Westford Rd - Tyngsboro, Westford |
88.0 |
88 |
34 |
|
89.6 |
90 |
35 |
Middlesex Rd -
Tyngsboro /
|
91.0 |
91 |
36
|