Consecutive 'incomplete' interstate interchanges

[PHLBOS]

The Mass Pike in Boston has 4 in a row (21,22,22A,23).  All only allow entry to WB and the only one that has an exit ramp at all (22) is only from EB.

What/Where's 22A along the Pike?

[Michael]

I-81 in Syracuse has 16 if you count the split diamond at Harrison and Adams streets (both halves are numbered as Exit 18) and the various ramps near Destiny USA as separate interchanges.  I started at the onramp at East Colvin Street just north of Exit 17, and went to Exit 24:

- Unnumbered northbound entrance from East Colvin St

- Exit 18 split diamond

- Exit 19 half diamond

- Exit 20 half diamond

- Unnumbered southbound entrance from Genant Drive

- Exit 22 northbound exit only

- Exit 21 southbound exit only

- Unnumbered southbound entrance from Genant Drive

- Unnumbered entrance from Court Street/Sunset Ave

- Exit 23 northbound

- Exit 23 A-B southbound

- Hiawatha Blvd onramp between exits 23 A and B

- Exit 24 A-B northbound

Exits 23 and 24 are a mess on the map.  Exit 23 only has exit ramps, and the southbound exit ramp splits into A and B.  Exit 24 is a northbound exit only and is split into A and B ramps.  To access I-81 southbound, you have to go through the Destiny USA mall parking lot to get on the I-81 southbound frontage road.

If you want to stretch it even more, Exit 17 uses a local street as a frontage road between the southbound offramp and onramp.  That would bring the total to 17 interchanges.  Not every interchange has full access, and it's too hard to describe in words, so it's best to just look at a map of Syracuse.

An interesting non-Interstate is the NY 5 Camillus Bypass.  It has four half diamonds, and the only full interchange is with NY 695.

[roadman65]

I forgot this one, but I-78 in Union County, NJ has three or four depending on how you call it.

EB you have the Watchung Berkley Heights exit (Exit 42 I think it is) that is a right  out single rampwith no access to the eastbound or Westbound sides from wherever the ramp leads to.  Then you have Exit 43 that is missing a few movements to make it incomplete.  Then Exit 44 is a right in and out to CR 527 which is a frontage road to the interstate.  Finally there is Exit 45 to CR 527 again with only E Bound off and WB on, where even N Bound 527 cannot even turn left to get on I-78 westbound.

[Beeper1]

The Mass Pike in Boston has 4 in a row (21,22,22A,23).  All only allow entry to WB and the only one that has an exit ramp at all (22) is only from EB.

What/Where's 22A along the Pike?

The on-ramp from Clarendon Street is technically considered "exit 22A".

[PHLBOS]

The Mass Pike in Boston has 4 in a row (21,22,22A,23).  All only allow entry to WB and the only one that has an exit ramp at all (22) is only from EB.

What/Where's 22A along the Pike?

The on-ramp from Clarendon Street is technically considered "exit 22A".

I don't think I've seen any map nor document that lists that entrance ramp (which goes underneath a parking garage prior to merging w/I-90 westbound) as such; yet I've seen plenty of maps that list the westbound entrance ramps at Arlington St. & Mass Ave. as Exits Interchanges 23 & 21 respectively.

[jeffandnicole]

The Mass Pike in Boston has 4 in a row (21,22,22A,23).  All only allow entry to WB and the only one that has an exit ramp at all (22) is only from EB.

What/Where's 22A along the Pike?

The on-ramp from Clarendon Street is technically considered "exit 22A".

I don't think I've seen any map nor document that lists that entrance ramp (which goes underneath a parking garage prior to merging w/I-90 westbound) as such; yet I've seen plenty of maps that list the westbound entrance ramps at Arlington St. & Mass Ave. as Exits 23 & 21 respectively.

How does an entrance ramp have an Exit number?

Maybe they're Interchange numbers, but not Exit numbers.

[Beeper1]

The Clarendon St ramp is considered interchange 22A according to MassDOT:
http://www.massdot.state.ma.us/highway/TrafficTravelResources/I90InterchangeNumbers.aspx

The onramp from Dartmouth St./St. James St.  is considered the interchange 22 entrance.

[bzakharin]

Are there any entrance-only interchanges that have a signed number? I only know of one entrance of any sort with a signed number, GSP exit 36: https://www.google.com/maps/@39.3913854,-74.5631854,3a,75y,53.07h,89.47t/data=!3m7!1e1!3m5!1sW-RxE5ihF3XBfi3at5Jp6w!2e0!5s20151001T000000!7i13312!8i6656!5m1!1e1?hl=en but of course it's not entrance only. For that matter, how common are entrances of any sort that are signed this way?

[TheHighwayMan3561]

I-494 has three in a row in Eden Prairie/Bloomington.

Prairie Center Drive/Flying Cloud Drive (westbound exit/eastbound entry only)
US 169 (no direct access between SB 169 and WB 494 or EB 494 and NB 169)
West Bush Lake Road (no access from Bush Lake to WB 494 until that movement is constructed in the next couple years)

As a side note, this is part of a stretch of 4 incomplete interchanges out of 5 on I-494, as the Valley View Road exit on the north side of US 212/MN 5 is a NB entry/SB exit.

[PHLBOS]

The Mass Pike in Boston has 4 in a row (21,22,22A,23).  All only allow entry to WB and the only one that has an exit ramp at all (22) is only from EB.

What/Where's 22A along the Pike?

The on-ramp from Clarendon Street is technically considered "exit 22A".

I don't think I've seen any map nor document that lists that entrance ramp (which goes underneath a parking garage prior to merging w/I-90 westbound) as such; yet I've seen plenty of maps that list the westbound entrance ramps at Arlington St. & Mass Ave. as Exits Interchanges 23 & 21 respectively.

How does an entrance ramp have an Exit number?

Maybe they're Interchange numbers, but not Exit numbers.

They are (interchange) numbers.  You knew very well what I meant.    Earlier thread has since been corrected.

[Revive 755]

The Tri-State was a big offender as well.  The following used to be incomplete, but have been upgraded: Buckley Rd (IL-137), Town Line Rd (IL-60), Half Day Rd (IL-22), Willow Rd, 95th St (US-12/20), and 159th St (US-6).

The Tri-State still is/will be a big offender:

* IL 21 (NB on, SB off) and IL 120 (NB off, SB on)
* The already cited IL 58, US 14, and Touhy Avenue
* Balmorral (NB off, SB on), IL 19 (SB off, NB on), proposed half interchange with the proposed I-490/Franklin Street connector (NB off, SB on), and that interchange with IL 64, US 20, and WB I-290
* IL 83/147th Street (NB on, SB off), and I-57 (NB to NB, SB to SB)

The Northwest Tollway also had its fair share that have since been upgraded to complete interchanges: IL-47, IL-59, Arlington Heights Rd, and in the process of being upgraded, Elmhurst Rd.  There are plans for Barrington Rd to become a full interchange as well.

Barrington Road should be open, given that the bridge appears to be complete:  Link to tollway website with pictures[/link].  However, the Barrington/Roselle pair of half interchanges will be traded for a new pair with Roselle and Meacham, since Meacham will only have WB ramps, and the entrance to WB I-90 from Roselle/Central is at least on hold.


Technically, I-44 in the St. Louis area gets four or more twice:

* Laclede Station/Murdoch (WB on, EB off), Shrewsbury Avenue (WB off, EB on), Jamieson (WB on, EB off), Arsenal Street (WB off, EB on), and Southwest Avenue (EB on, WB off)
* I-55 at the PSB/Walnut Street, Washington Avenue (WB on, EB off), MLK Bridge area (WB off, EB on), North Broadway (WB off, EB on, WB exit from the reversible lanes), I-70/Madison Street

I-55 on the Illinois side of the St. Louis area also has a few with Exchange Avenue (now just SB off, used to have a NB entrance), I-70/I-64/IL 3 (lacks access to the I-70 bridge to and from the south), MLK Bridge/Missouri Avenue, (NB on, SB off, SB on currently under construction, EB MLK Bridge to MLK Drive, WB MLK Drive to WB MLK Bridge), Broadway (NB off, SB on)