Same exit with different numbers depending on the direction

[silverback1065]

I noticed something interesting, at both points where I-70 crosses I-465, the exit has 2 different numbers depending on the direction you are traveling.  On the west side, if you are going EB its exit 69, if you are going WB it's exit 73.  On the east side of town if you are traveling EB it's exit 89, if you are traveling WB it's exit 90.  Any other locations where this happens?

[pianocello]

The exit for eastbound I-69 on I-96 in Lansing, MI is Exit 91 going west and Exit 89 going east.

Another Indiana example: Southbound I-65 from I-80/94 is Exit 11 going east and part of Exit 12 (formerly Exit 12A) going west.

[pdx-wanderer]

The I-84 junction here in Portland is I-5 exit 300 going north, and exit 301 going south.

There could be a few others around here as well but that's the only one I can think of.

[hotdogPi]

I-95 in Rhode Island: I-195 is Exit 19 or Exit 20 depending on direction. Will be fixed once mile-based.

[Eth]

I-85's exit for I-285 near the Atlanta airport is exit 68 northbound, but exit 70 southbound. This is probably because there's also a separate exit 69 in the middle of this very large interchange.

[US 89]

I-85's exit for I-285 near the Atlanta airport is exit 68 northbound, but exit 70 southbound. This is probably because there's also a separate exit 69 in the middle of this very large interchange.

This sounds very similar to the I-80 and I-215 interchange east of Salt Lake City. The exit for I-215 from I-80 is 128 eastbound and 130 westbound, because exit 129 (Foothill Drive) is right between the two. This is a huge interchange that is definitely outdated by today’s standards.

[Scott5114]

S.E. 15th Street in Oklahoma City is signed as 125B northbound and 125D southbound. Apparently there's a reason for this involving ramps that were removed in the 1990s.

[PHLBOS]

Two examples along I-90/Mass Pike:

Allston/Brighton/Cambridge: Exit 18 eastbound/Exit 20 westbound, former mainline toll barrier was unsigned Exit 19.  Should be corrected if/when mile-marker interchange numbering is adopted.

I-95 (MA 128) to MA 30: Exit 14 eastbound/Exit 15 (recently changed to Exits 15B-A) westbound.  Should be corrected if/when mile-marker interchange numbering is adopted.  Edit (courtesy of Roadman's later clarification post): Exit 15 was also the mainline eastbound terminus of the now-defunct toll-ticketed system.

New Jersey
I-76 for I-676 northbound just east of the Walt Whitman Bridge: Exit 354 eastbound (DRPA cluster*&#@)/Exit 2 westbound.

Pennsylvania
I-95 in the Philadelphia International Airport (PHL) vicinity

Cargo City: Exit 10 northbound/Exit 12B southbound

PA 291 (for both directions): Exit 12B southbound/Exit 13 northbound (Exit 10 off I-95 northbound is for PA 291 eastbound only)

[kennyshark]

On I-696 in Southfield, MI we have Telegraph Road (US 24) as eastbound Exit 8 and westbound Exit 10.  Telegraph Road is part of the "Mixing Bowl" interchange that also includes M-10 (Lodge Fwy/Northwestern Highway, depending on which direction you're going) and Lasher Road (westbound only).  This area tends to be a rush-hour bottleneck, especially eastbound where I-696 loses a lane.

[Takumi]

I-95 in Petersburg, Virginia: Washington/Wythe is Exit 50D northbound and 52 southbound.

[Flint1979]

The exit for eastbound I-69 on I-96 in Lansing, MI is Exit 91 going west and Exit 89 going east.

Another Indiana example: Southbound I-65 from I-80/94 is Exit 11 going east and part of Exit 12 (formerly Exit 12A) going west.

Your first example is because Exit 90 is in the middle of the I-69/I-96 interchange and serves Grand River. Exit 81 to Grand River via Francis Road gets you to the same exit that's exit 90 off I-96.

[bzakharin]

On the Garden State Parkway, US 40/322 is signed on Exit 36 Northbound and Exit 37 Southbound. It is not really the same exit, though. Exit 36 Northbound dumps you on Fire Rd (which leads to 40/322 if you go North), while Exit 36 Northbound leads to Tilton Rd Southbound only (No access to 40/322 which is North of there). Exit 37 Southbound takes you to Washington Ave (which leads to 40/322 if you go North). Exit 37 is Southbound only. The only direct interaction between the two roads is an entrance ramp from 40/322 West onto GSP North.

This is typical of the Parkway in Atlantic County, piecemeal interchanges with no direct access to important roads.

[Flint1979]

On I-696 in Southfield, MI we have Telegraph Road (US 24) as eastbound Exit 8 and westbound Exit 10.  Telegraph Road is part of the "Mixing Bowl" interchange that also includes M-10 (Lodge Fwy/Northwestern Highway, depending on which direction you're going) and Lasher Road (westbound only).  This area tends to be a rush-hour bottleneck, especially eastbound where I-696 loses a lane.

I couldn't agree more. That interchange has traffic coming in from all directions and I've sat in some pretty bad traffic jams at the Mixing Bowl.

[TheStranger]

The exit for Millbrae Avenue off US 101 near San Francisco International Airport is Exit 420 southbound, Exit 421 northbound. (The Exit 420 sign dates back to the early 2000s when CalNEXUS started and thus is one of the only button copy exit number signs ever installed then; the Exit 421 signage is of more recent vintage)

Southbound:
https://www.google.com/maps/@37.605199,-122.3848241,3a,19.6y,135.38h,90.53t/data=!3m6!1e1!3m4!1sZlchHJ9DEi7iOycNKhw_SA!2e0!7i16384!8i8192

Northbound:
https://www.google.com/maps/@37.5997433,-122.3757256,3a,16y,312.46h,93.18t/data=!3m7!1e1!3m5!1sf2uvlZh5jOleJ-lR4gEURw!2e0!6s%2F%2Fgeo2.ggpht.com%2Fcbk%3Fpanoid%3Df2uvlZh5jOleJ-lR4gEURw%26output%3Dthumbnail%26cb_client%3Dmaps_sv.tactile.gps%26thumb%3D2%26w%3D203%26h%3D100%26yaw%3D285.13684%26pitch%3D0%26thumbfov%3D100!7i16384!8i8192

[cl94]

Two examples along I-90/Mass Pike:

Allston/Brighton/Cambridge: Exit 18 eastbound/Exit 20 westbound, former mainline toll barrier was unsigned Exit 19.  Should be corrected if/when mile-marker interchange numbering is adopted.

I-95 (MA 128) to MA 30: Exit 14 eastbound/Exit 15 (recently changed to Exits 15B-A) westbound.  Should be corrected if/when mile-marker interchange numbering is adopted.

I would argue these are the two most prominent examples of the phenomenon. Easier for accounting purposes (14 is the east end of the ticket system, 15 and 18/20 are ramp tolls, 19 is a mainline barrier).

Another one in NJ is the Turnpike (Eastern Spur) exit for NJ 495. NB is Exit 16E, SB is Exit 17. Like the MA examples, this is done to keep the ramp toll as its own thing.

[roadman]

One clarification.  Under the pre-AET MassPike accounting system, I/C (Interchange) 15 encompassed not only the westbound ramp toll to I-95(128) and MA 30, but also the mainline barrier that was the start of the ticket system westbound and the end of the ticket system eastbound.

[Kulerage]

Not quite what you're looking for, but at the US 264/Stantonsburg Road interchange, the eastbound US 264 road is exit 73B, but from the westbound road the exit is unnumbered. It's because of 264 changing roads, leaving the highway off the road by the time the west exit happens, but I guess it counts.

[Bickendan]

The I-84 junction here in Portland is I-5 exit 300 going north, and exit 301 going south.

There could be a few others around here as well but that's the only one I can think of.

This didn't used to be the case: Prior to the I-5 north to I-84 ramp being extended south from the original split under the Morrison Bridge facility to curve of the Marquam Bridge, and taking over the Water Ave exit, I-84 was 301 both directions. That was 1991-92, if memory serves.

[Brandon]

There's a few on the Illinois Tollways now that they have exit numbering.

1. Ogden Avenue (US-34) at I-355: northbound is Exit 20 B, southbound is Exit 19.  This goes hand-in-hand with...
2. I-88 at I-355: northbound is Exit 20 A, southbound is Exit 20.
These are due to the fact that the Ogden interchange is in the middle of the I-88 interchange.  Thus, the ramps for I-88 leave I-355 north before the ramp for Ogden.  Otherwise, Exit 20 would appear before Exit 19 (Illinois does have an example of that below).
https://goo.gl/maps/6FbNpWeztv12
https://goo.gl/maps/q8smTnZJm1u

3. I-355 at I-88: Eastbound has Exit 131 for I-355 south and Exit 132 for I-355 north.  Westbound has Exit 131 B for I-355 north and Exit 131 A for I-355 south.
https://goo.gl/maps/pXgZqrhG22E2
https://goo.gl/maps/KfVcrLH5WCx

4. I-88 at I-294: Northbound is Exit 29 and southbound is Exit 31 A.
https://goo.gl/maps/DBSCfmJHxeK2
https://goo.gl/maps/KTByRFwEVgB2

5. I-290 west at I-294: Northbound is Exit 31 and southbound is Exit 33.
https://goo.gl/maps/HSNZts2hBsx
https://goo.gl/maps/vF6tJzt2cwy

6. I-294 north at I-290: Westbound is Exit 15 A and eastbound is Exit 13 A.
https://goo.gl/maps/pjMu4XwzrMp
https://goo.gl/maps/E1MpZqYtn1w

7. I-94/IL-394 at I-80/I-294/I-94: Eastbound is Exit 0 and westbound is Exit 160.
This is due to the exit numbering for the Tri-State Tollway ending at the interchange and I-80's exit numbering taking over for the Kingery Expressway.
https://goo.gl/maps/wahcQWwpC4D2
https://goo.gl/maps/umB6L8F8qBE2
An additional oddity here is that Exit 160 comes before Exit 161 westbound.
https://goo.gl/maps/YbnMV59CYkC2

[PurdueBill]

Not quite what you're looking for, but at the US 264/Stantonsburg Road interchange, the eastbound US 264 road is exit 73B, but from the westbound road the exit is unnumbered. It's because of 264 changing roads, leaving the highway off the road by the time the west exit happens, but I guess it counts.

I found it odd when I lived there (and find it still odd) that 264 has a numbered exit to stay on 264 in both directions and there is not another route being joined (which would at least justify the exit number somewhat).  Exit 73B eastbound to stay on 264 EB, Exit 73A westbound to stay on 264 WB.  Even worse, westbound has Exit 73B posted as the loop (which you default onto if you don't stay on 264) for Greenville Downtown.  So 73B is posted for two totally different things depending on the direction, and if you exit westbound for Downtown, you see both of them as you loop onto the eastbound side of 264 before it exits itself as 73B, with Greenville Downtown now posted without Exit number as the thru lanes.  It's all because of the half-cloverleaf and 264 exiting itself, but it is really odd.

[1995hoo]

The Springfield Interchange on the Capital Beltway has different numbers depending on direction. Coming around the Outer Loop (from Fairfax/Tysons towards Alexandria and the Wilson Bridge) it uses I-495's mileposts and its exit numbers carry over from Maryland's, so the Springfield Interchange is Exit 57 (Exit 1, if it existed, would be on the Wilson Bridge). Coming around the Inner Loop from the Wilson Bridge, the Beltway is dual-signed as I-95/I-495 (technically it's just I-95 and the I-495 is signed for motorist convenience) and the exits are numbered according to Virginia's I-95 under the theory the 2di trumps the 3di, such that the Springfield Interchange is Exit 170. The Outer Loop exit to I-395 is Exit 57B and the Inner Loop exit to I-395 is Exit 170B.

We live a short distance south of the interchange just east of there, which would be Exit 60 if they used "Beltway numbering" but is instead Exit 173, and the exit numbering is a mild nuisance when giving directions because even though I tell people to expect the exit number to jump from 57 to 173 they invariably think I misquoted them the travel time because they think they have almost 120 miles yet to go.

A bit of an oddity is that going straight through on the Outer Loop, i.e., staying on the Beltway, has no exit number, but going straight through on the Inner Loop is numbered as Exit 170A, presumably under the theory that you're "exiting" I-95 onto I-495. This has long annoyed many local motorists and I've long thought Virginia ought to ignore the MUTCD and leave the thru movement unnumbered, same as Maryland does when I-95 leaves the Beltway in College Park. Come to think of it, there's another place where the exit numbering differs on each side of the road: In Maryland, on the Outer Loop neither movement (I-95 north towards Baltimore leaving the Beltway, or staying on the Beltway west towards Silver Spring) has an exit number, whereas on the Inner Loop the ramp to I-95 north is Exit 27 and the thru Beltway movement has no number. (Again, this is clearly due to the I-95/I-495 dual signing east of there. I've always thought Maryland's setup on the Outer Loop of not using an "exit" designation for a movement that is, regardless of what the MUTCD claims, clearly staying on the same highway makes a lot of sense. The Inner Loop at the Springfield Interchange has four lanes continuing straight through on the Beltway. It's not an "exit" in the sense that most rational people use that term.)

[roadfro]

I-15 in Nevada has two instances of this which changed fairly recently:
*Russell Road is signed as exit 36 southbound and now signed exit 35 northbound.
*Tropicana Avenue is signed as exit 37 southbound and now signed exit 36 northbound.

The southbound exit numbers are original and the correct numbers based on distance. It appears the northbound numbers were changed during the I-15 south design-build improvement project a few years ago. That project constructed C/D lanes along the highway, which moved northbound off ramps much further south than they once were (since the exits now interact with the C/D roads). So it appears the northbound numbers were changed to be more location appropriate, despite the directional numbering inconsistency.


There's also one on US 95 as well:
*Northbound, Rancho Drive is exit 90A and Ann Road is exit 90B. Southbound, both are part of exit 91.

This is in the vicinity where the 215 beltway interacts with US 95 (aka the "Centennial Bowl" interchange). When the new flyover from westbound 215 to southbound 95 was constructed, a C/D road was constructed for the local exits to eliminate weaving issues. The southbound US 95 exits for Rancho and Ann are now combined with the preexisting southbound exit 91 for Centennial Center Blvd further upstream.

[jp the roadgeek]

I-91 in Springfield, MA.  Two numbers, both for MA 83.

Northbound: https://www.google.com/maps/@42.0756193,-72.5815215,0a,75y/data=!3m4!1e1!3m2!1s1CsFhfbiZcg4rJaMv8wcfw!2e0

Southbound: https://www.google.com/maps/@42.0891586,-72.5815095,0a,75y/data=!3m4!1e1!3m2!1s084Da7lfyB8Rf6Qzkwllyw!2e0

[PHLBOS]

I-91 in Springfield, MA.  Two numbers, both for MA 83.

Northbound: https://www.google.com/maps/@42.0756193,-72.5815215,0a,75y/data=!3m4!1e1!3m2!1s1CsFhfbiZcg4rJaMv8wcfw!2e0

Southbound: https://www.google.com/maps/@42.0891586,-72.5815095,0a,75y/data=!3m4!1e1!3m2!1s084Da7lfyB8Rf6Qzkwllyw!2e0

Your posted GSV for southbound is situated beyond the BGS.

Here's a better-location shot

[jp the roadgeek]

I-91 in Springfield, MA.  Two numbers, both for MA 83.

Northbound: https://www.google.com/maps/@42.0756193,-72.5815215,0a,75y/data=!3m4!1e1!3m2!1s1CsFhfbiZcg4rJaMv8wcfw!2e0

Southbound: https://www.google.com/maps/@42.0891586,-72.5815095,0a,75y/data=!3m4!1e1!3m2!1s084Da7lfyB8Rf6Qzkwllyw!2e0

Your posted GSV for southbound is situated beyond the BGS.

Here's a better-location shot

Posting from the app isn't as reliable as from the desktop version