Image of MA I-93 Shield, From Shields Up! I-93 in MA Exit List

47 Miles, from I-95 in Canton to NH Border

Exit Renumbering Completed on May 20, 2021

Image of overhead advance signs for I-90/South Station and Columbia Road exits with new milepost based exit numbers on I-93 North in Boston, May 2021

Interchange (completed section)

Milepost

New Exit Number

Old Exit Number

 I-95 shield image from wikimedia South - Providence, RI (SB)

0.3

1A (0A)*

1A

 I-95 shield image from wikimedia North US 1 thumbnail image from Shields Up! South - Dedham, Portsmouth, NH

0.0

1B (0B)*

1B

 MA 138 shield from mediawiki South - Stoughton

1.4

2A (1A)*

2A

 MA 138 shield from mediawiki North - Milton

1.4

2B (1B)*

2B

 Houghton's Pond/Ponkapaug Rd

2.6

3 (2)*

3

 MA 24 shield from mediawiki South - Fall River

3.5

4 (3)*

4

 MA 28 shield from mediawiki South - Randolph

4.2

5A (4A)*

5A

 MA 28 shield from mediawiki North - Milton

4.2

5B (4B)*

5B

 MA 37 shield from mediawiki -  W. Quincy, Braintree (Holbrook NB)

6.4

6

6

 MA 3 shield from mediawiki South - Cape Cod

6.8

7

7

 Furnace Brook Pkwy - Quincy

8.2

8

8

 Adams St - Milton (NB)

9.2

9

9

 Bryant Ave - Quincy (SB)

9.4

9

9

 Squantum St - Milton (SB)

10.1

10

10

 Granite Ave - Milton 

10.8

11A (11 NB)

11A (11 NB)

 To MA 203 shield from mediawiki Granite Ave - Ashmont (SB)

10.8

11B

11B

 MA 3A shield from mediawiki South - Neponset, Quincy (SB)

11.6

12

12

 Freeport St - Dorchester (NB)

12.5

13A

13

 Morrissey Blvd - Savin Hill (NB)

12.7

13B

14

 Columbia Rd - Dorchester, S. Boston

14.3

14

15

 Southampton St/Andrew Sq (NB)

14.8

15A

16

 Mass Ave - Roxbury

15.5

15B (15 SB)

18

 I-90 shield image from wikimedia Mass Pike - South Boston, Logan Airport,             Worcester

17.3

16 (16A SB)

20 (20A SB)

 Purchase St/South Station (SB)

17.5

16B***

23

 Govt Center/North End (NB)

17.8

17

23

 MA 1A shield from mediawiki - Logan Airport (SB)

17.9

17 A/B

24 A/B

 MA 3 shield from mediawiki North - Storrow Drive, Cambridge (NB)

18.1

18** (18C)*

26

 US 1 shield from mediawiki North - Tobin Bridge (NB)

18.6

19

27

 To MA 99 shield image from Wikimedia - Somerville (NB)

19.2

20

28

 MA 28 shield from mediawiki MA 3 shield from mediawiki North - Cambridge, Storrow Dr (SB)

19.7

18**

26

 Sullivan Square/Charlestown (SB)

20.2

20 (21A)*

28

 MA 28 shield from mediawiki MA 38 shield from mediawiki - Somerville, Everett (NB)

20.3

21

29

 MA 38 shield from mediawiki - Somerville (SB)

21.3

21 (21B)*

30

 MA 16 shield from mediawiki East - Revere (SB)

21.9

22 (22A)*

31

 MA 16 shield from mediawiki West - Arlington, Medford (NB)

22.1

22 (22A)*

31

 MA 60 shield from mediawiki - Medford Square (To MA 16 shield from mediawiki West (SB))

22.6

23 (22B)*

32

 MA 28 shield from mediawiki - Fellsway West, Medford

23.2

24 (23)

33

 MA 28 shield from mediawiki - Stoneham (NB)

25.3

25

34

 Park St - Melrose (SB)

26.1

26

35

 Montvale Ave - Stoneham

26.9

27

36

 I-95 shield image from wikimedia (MA 128 shield from mediawiki) North - Peabody

28.4

28A

37A

 I-95 shield image from wikimedia (MA 128 shield from mediawiki) South - Waltham

28.4

28B

37B

 Commerce Way - Anderson RTC

30.0

30

37C

 MA 129 shield from mediawiki - Wilmington

31.1

31

38

 Concord St - Wilmington

32.6

33

39

 MA 62 shield from mediawiki - N. Reading, Wilmington

34.1

34

40

 MA 125 shield from mediawiki - Andover, N. Andover

34.6

35

41

 Dascomb Rd - Andover, Tewksbury

37.7

38

42

 MA 133 shield from mediawiki East - Andover

39.2

39A (39 NB)

43A (43 NB)

 MA 133 shield from mediawiki West - Tewksbury (SB)

39.2

39B

43B

 I-495 shield image from wikimedia North - Lawrence

40.5

40A

44A

 I-495 shield image from wikimedia South - Lowell

40.5

40B

44B

 River Rd - South Lawrence

42.4

42

45

 MA 110 shield from mediawiki MA 113 shield from mediawiki (East) - Lawrence, Dracut

43.4

43 (43A NB)

46 (46A NB)

 MA 110 shield from mediawiki MA 113 shield from mediawiki West - Dracut (NB)

43.4

43B

46B

 Pelham St

45.1

45 (45A)*

47

 MA 213 shield from mediawiki East - Methuen, Haverhill

45.5

46 (45B)*

48

This exit list contains both the new and old sequential exit numbers after MassDOT converted I-93 to the Geographic Reference or Milepost Exit Numbering system  in May 2021. MassDOT started to convert exit numbers in October 2020 first to routes in eastern and southern parts of the state. This project was first planned for 2016, but eventually postponed.

*Numbers in ( ) listed for the postponed 2016 Renumbering Project.

**MassDOT uses the same number, 18 for both Storrow Drive exits, despite the I-93 South exit being north of the Mile 20 marker. In a response to a comment I sent MassDOT about this, I received this answer:

"For ease of navigation and for consistency in directing people to businesses, exits in different directions that serve the same route, street, or area of a city or town, are being given the same exit number even when they are physically located at different locations along the highway.  As the signs on I-93 south for the Sullivan Square and Leverett Connector/Storrow Drive exits overlap, this “out of order” numbering should not create undue confusion for drivers."

This was the explanation for the de-emphasis on the use of lettered exits in the 2019 proposed numbers vs. that of the postponed 2016 project:

"To minimize possible driver confusion, the proposed exit numbering on all highways under this project will use the A/B/C scheme only to denote exits that either serve both directions of a route or street from separate ramps on the highway (such as I-95(128) at I-93 in Woburn); to denote multiple exits accessed by a collector-distributor road off the highway (such as the northbound exit from I-95 to I-90 and Route 30, and the southbound exit from I-95 to Highland Avenue and Kendrick Street); or to denote separate exits that are so closely spaced apart that assigning separate numbers is impractical (such as Southampton Street and Frontage Road on I-93 northbound in Boston)."

***Change from original exit number list posted on MassDOT Exit Renumbering project website in May 2020 document on second contract bid page.

      Visit photos of I-93 Exit Renumbering at New England Exit Renumbering Central

        Travel the length of I-93 using these videos (courtesy of RoadwayWiz):

  Northbound:  Exits 1 to 7   Exits 7 to 18   Exits 18 to 28   Exits 28 to 37   Exits 37 to 44   Exits 44 to 48

  Southbound:  Exits 48 to 44   Exits 44 to 37   Exits 37 to 28   Exits 28 to 18   Exits 18 to 7   Exits 7 to 1

© Robert H. Malme 2013-2021