Interstates which exit off of themselves

[mwb1848]

Rare is instance in which thru traffic has to exit off of the mainline freeway to remain on an interstate highway. One of the best (worst) examples is on I-55 in Memphis approaching the Mississippi River: https://goo.gl/maps/qQ9pH

However, as I-69 has been piecemealed across the country, there are several instances in which traffic will have to do that to remain on the new Interstate. Here are a handful of examples I've found along I-69 and Future I-69. I'm sure there are others; I'd be interested to hear about them. (Moreover, if I'm incorrect in any of these I'm sure you'll let me know. )  I'm also interested if anybody can think of another interstate which requires you to exit so many time to stay on it.

NORTHBOUND
I-69/I-55/Future I-269, near Hernando, MS: https://goo.gl/maps/jrkXL
I-69/I-24 near Calvert, KY: https://goo.gl/maps/Gon6j

SOUTHBOUND
I-69/I-24 near Calvert, KY: https://goo.gl/maps/fDCyD
US 45 Bypass/Purchase Parkway in Mayfield, KY: https://goo.gl/maps/nO4MJ
These plans from TDOT indicate that I-155 will no longer be treated as the through route, but rather the main lanes of I-69 will curve south with a one-lane exit to I-155 at this location west of Dyersburg, TN: https://www.tn.gov/assets/entities/tdot/attachments/i-69s42.pdf
I-69/I-55/Future I-269 in Hernando, MS: https://goo.gl/maps/9DWhW
I-69/Mississippi 304 near Tunica, MS: https://goo.gl/maps/sUcxy

[sandwalk]

I-90, between I-80 and OH SR 2
Elyria, Ohio
https://goo.gl/maps/cZSbj
*note I-90 only has one lane at the exits

I-76 & I-80 Junction, where the Ohio Turnpike is the through route
near Youngstown, Ohio
https://goo.gl/maps/RwUkU

Both I-76 and I-77
Akron, Ohio
https://goo.gl/maps/cqRfN

I-39 at US 20
Rockford, Illinois
https://goo.gl/maps/tp1Rh
*note I-39 has one exit lane

[AlexandriaVA]

In Springfield, VA, you get the situation where 95 comes up from southern Fairfax County and then co-routes with the outer loop of the Beltway (495) heading through southern Alexandria. As a result, one who wishes to stay on 95 proper must exit to continue on 95. If you don't exit, it becomes 395 heading towards DC.

However (95 hoo maybe you can confirm my facts), interestingly, they don't call the ramp which lets you continue on 95 north an exit. Rather, if you stay in the middle of the carriageway and head in the same cardinal direction (with the road becoming 395), they consider it an "exit". https://www.google.com/maps/@38.7720371,-77.1820766,3a,75y,24.6h,78.76t/data=!3m6!1e1!3m4!1svdUPA1TYyqF06VwsUtzc2g!2e0!7i13312!8i6656

The same goes for southbound traffic. When you're on 395 coming southbound, if you stay on the carriageway and let it become 95 southbound, you've "exited". (https://www.google.com/maps/@38.79797,-77.1686638,3a,75y,233.61h,85.5t/data=!3m6!1e1!3m4!1seHiQv7rTZGaun1Am6n3wig!2e0!7i13312!8i6656)

[oscar]

Interstate H-1 westbound, at exit 19. (That was part of the excuse for turning through route HI 78 into Interstate H-201.)

Interstate A-1 (state route AK 1) eastbound, at its junction with Interstate A-4 (state route AK 3).

One example each from two states with very few freeways, so the lower-48 list might be pretty long.

[tidecat]

I seem to recall this happening on I-39 South either in or just south of Rockford.

[english si]

I-80 at Lake Station, IN and Wetzl, OH
I-90 at Elyria, OH
I-70 at Breezewood (more than one)
I-76 at Wetzl, OH

[TheHighwayMan3561]

I seem to recall this happening on I-39 South either in or just south of Rockford.

Yep. Headed southbound on I-39 US 20 is the mainline, and I-39/US 51 exit off.

[cwf1701]

I-75 in Detroit (I-75 changes from the fisher Freeway to the Chrysler Freeway). NB mainline (Fisher) ends at Gratiot Ave and Southbound mainline (Chrysler) becomes I-375.

[pianocello]

I-80 at Lake Station, IN and Wetzl, OH

And Colona, IL, Hazel Crest, IL, and West Des Moines, IA. Also, I-74 does this twice in a row in Moline, IL and Colona, IL, and then again down the road in Indianapolis.

[WillWeaverRVA]

Because of how it's defined, I-195 in Virginia has to exit off itself to continue southbound. The mainline becomes VA 76.

[SidS1045]

At the I-95/I-93 junction in Canton MA:  If you're headed south on I-95, you must exit the main highway to remain on 95.  Continuing straight (which is signed as the "exit") puts you on I-93 north.  (And no, let's not start another 128 discussion.)  Going north on 95, the highway "ends" and you do a 270-degree turn to remain on 95 north.

[rschen7754]

I-5 CA: at the East LA interchange (both ways), at CA 99 (northbound), at I-580 (northbound).

[Darkchylde]

I-10 East in New Orleans at US 90/90B. Also I-10 East in Baton Rouge at I-110.

I-70 East at I-35 (eastern end of overlap) in KC's Downtown Loop. Also, I-70 West at I-670 entering the Loop.

I-35 where it exits the Kansas Turnpike at I-335.

[cpzilliacus]

In Springfield, VA, you get the situation where 95 comes up from southern Fairfax County and then co-routes with the outer loop of the Beltway (495) heading through southern Alexandria. As a result, one who wishes to stay on 95 proper must exit to continue on 95. If you don't exit, it becomes 395 heading towards DC.

However (95 hoo maybe you can confirm my facts), interestingly, they don't call the ramp which lets you continue on 95 north an exit. Rather, if you stay in the middle of the carriageway and head in the same cardinal direction (with the road becoming 395), they consider it an "exit". https://www.google.com/maps/@38.7720371,-77.1820766,3a,75y,24.6h,78.76t/data=!3m6!1e1!3m4!1svdUPA1TYyqF06VwsUtzc2g!2e0!7i13312!8i6656

The same goes for southbound traffic. When you're on 395 coming southbound, if you stay on the carriageway and let it become 95 southbound, you've "exited". (https://www.google.com/maps/@38.79797,-77.1686638,3a,75y,233.61h,85.5t/data=!3m6!1e1!3m4!1seHiQv7rTZGaun1Am6n3wig!2e0!7i13312!8i6656)

Yes, I-95 through Springfield does not exit off of itself.  When the interchange was reconstructed, there was a deliberate effort to make I-95 the through movement via those big and soaring ramps.

[roadman65]

No one mentioned yet I-83 S Bound at I-283 at the infamous Eisenhower Interchange near Harrisburg, PA.

[PHLBOS]

I-76/276/PA Turnpike at Valley Forge; the Turnpike is the through-route.

[roadman]

At the I-95/I-93 junction in Canton MA:  If you're headed south on I-95, you must exit the main highway to remain on 95.  Continuing straight (which is signed as the "exit") puts you on I-93 north.  (And no, let's not start another 128 discussion.)  Going north on 95, the highway "ends" and you do a 270-degree turn to remain on 95 north.

The Canton "death curve" from I-95 north to I-95 north is planned to be replaced with a flyover:

http://www.massdot.state.ma.us/highway/HighlightedProjects/cantoninterchange.aspx

[Jardine]

I-680 at both ends of it's concurrence with I-29.

I find the cloverleaf at the south end to be particularly outdated and scary.

[bzakharin]

I-95 South exits itself if you are on the lower level of the George Washington Bridge / Express lanes. I-80 (which begins here) is the through route. From the upper level / local lanes, it's more of a 50/50 split, but I-95 is on the left, so it can be considered the through route. Then, the currently unsigned I-95 exits itself from the NJ Turnpike onto the PA Extension (Exit 6). Presumably once the PA Turnpike Interchange is completed, it will exit itself again at that interchange and onto the existing I-95.

I-87 exits itself Southbound where I-287 East is the through route. I-676 arguably exits itself just east of the Ben Franklin Bridge where US 30 is the through route.

[Brandon]

I-80 at Lake Station, IN and Wetzl, OH

And Colona, IL, Hazel Crest, IL, and West Des Moines, IA. Also, I-74 does this twice in a row in Moline, IL and Colona, IL, and then again down the road in Indianapolis.

I-74 does it again in Bloomington, at the northern interchange with I-55.  The southern one is more of a split.

I seem to recall this happening on I-39 South either in or just south of Rockford.

Yep. Headed southbound on I-39 US 20 is the mainline, and I-39/US 51 exit off.

I-39 does it twice in Rockford, once off I-90, and then off US-20.  The first one was fixed so it works more like a split.

Then, I-90 does it itself off the Dan Ryan Expressway in Chicago when it goes onto the Chicago Skyway.

I-94 does it further north when leaving the Edens Expressway (US-41).

[hbelkins]

Rare is instance in which thru traffic has to exit off of the mainline freeway to remain on an interstate highway. One of the best (worst) examples is on I-55 in Memphis approaching the Mississippi River: https://goo.gl/maps/qQ9pH

However, as I-69 has been piecemealed across the country, there are several instances in which traffic will have to do that to remain on the new Interstate. Here are a handful of examples I've found along I-69 and Future I-69. I'm sure there are others; I'd be interested to hear about them. (Moreover, if I'm incorrect in any of these I'm sure you'll let me know. )  I'm also interested if anybody can think of another interstate which requires you to exit so many time to stay on it.

NORTHBOUND
I-69/I-24 near Calvert, KY: https://goo.gl/maps/Gon6j

SOUTHBOUND
I-69/I-24 near Calvert, KY: https://goo.gl/maps/fDCyD
US 45 Bypass/Purchase Parkway in Mayfield, KY: https://goo.gl/maps/nO4MJ

Both of those exits (I-24/Purchase Parkway and US 45 Bypass/Purchase Parkway) are going to be rebuilt to allow for through high-speed movements for future I-69.

I saw plans (including signage) posted on KYTC's Division of Construction Procurement site yesterday.

[TheStranger]

Interstate 80 does this twice in Northern California: westbound at the MacArthur Maze, both directions in West Sacramento at US 50/Business 80.  Prior to 1968, when 80 was slated to continue to Golden Gate Park, it also exited off itself westbound at the Central Freeway in San Francisco.  (Prior to 1982, Interstate 80 took ramps to continue from today's US 50 to what was pre-1964 US 99E, see I-305 entry here)

I-280 arguably does this at the north split with Route 1 in Daly City (Route 1 north of there to the Presidio was the originally proposed I-280 route until 1968, with the north portion of the Junipero Serra Freeway today existing up to Brotherhood Way) when it switches over to the Southern Freeway.  Could even make a second case for this at US 101 going northbound in San Francisco, as pre-1964 the left lanes that lead to the Bayshore Freeway were the through lanes for US 101.

I-5 southbound continues to the right of the exit for I-805 south in San Diego.

I-15 presently uses ramps to split from I-215 in Cajon (as 215 is the original 15 routing and also was part of the old US 395 through route).

I-10 uses ramps to exit off the San Bernardino Freeway (and continue onward on the Golden State Freeway & vice versa) at the north I-5 junction, then uses a ramp westbound to continue onto the Santa Monica Freeway.  In Beaumont, westbound I-10 exits from the right side while the left lanes continue for Route 60 west (in what used to be a split of the old US 60/70/99 concurrency).  (In addition, the Santa Monica Freeway was built with the leftmost eastbound lanes at the 110 junction ramping off towards the Harbor Freeway north)

Unsigned I-305 possibly exits off of US 50 to continue along the 1960s portion of former I-80 (current Business 80/Route 51) right before the substandard bridge over the American River.

I-580 does this multiple times:

- eastbound at I-205
- both directions at I-238
- westbound at the MacArthur Maze (formerly the through route for US 50)
- westbound at the Hoffmann Split in Albany (pre-1997, 580 (old Route 17) had the through lanes here and 80 (old US 40) split from the right)

The 680/780 split in Benicia has the two left lanes on northbound 680 leading off towards 780 west.  (Though this is not the original bridge or interchange here, pre-1976 this was the through route for 680 with Route 21 continuing on to Cordelia)

I-210 and the Foothill Freeway uses a ramp westbound where it connects with Route 134 and the 710 stub in Pasadena.

I-215 southbound in Moreno Valley splits on the right from Route 60 eastbound, with 60 as the through lanes.  In Riverside, both directions of 215 then use right-side ramps at the junction with Route 91.

At I-710's southernmost extent, both directions use ramps to depart from the Seaside Freeway (where the through lanes continue east as Ocean Boulevard into Long Beach).

[okroads]

Oklahoma City has a few instances:
I-35 at I-40/I-235 (both directions, one lane ramps)
I-44 East at OK 66 & OK 74
I-35/I-44 at I-44 East (Turner Turnpike), one lane ramps in both directions connect I-44/Turner Turnpike to/from I-35

And my soon-to-be home area of Columbus, Ohio has this instance at the west junction of I-70 & I-71, where I-71 traffic is limited to one lane in each direction when it exits to/from I-70.

[thefraze_1020]

Portland, OR:

I-84 westbound exits off itself at exit 9 (I-205):
https://www.google.com/maps/@45.5475747,-122.5487981,3a,75y,275.19h,82.55t/data=!3m6!1e1!3m4!1sYnWfRWgBlErlBOvj28b83Q!2e0!7i13312!8i6656?hl=en

I-5 arguably exits off itself at its southern junction with I-405:
https://www.google.com/maps/@45.4977158,-122.6732436,3a,75y,2.07h,92.41t/data=!3m6!1e1!3m4!1ssTW2NfFurCyLBXCZEn_SEA!2e0!7i13312!8i6656?hl=en

...and then immediately I-405 northbound exits off itself, because the through route was originally US99:
https://www.google.com/maps/@45.5021938,-122.6736639,3a,75y,342.8h,82.66t/data=!3m7!1e1!3m5!1sTsuK1RqvyjFBrrItzxubBQ!2e0!5s20140901T000000!7i13312!8i6656?hl=en

[roadman65]

https://farm6.staticflickr.com/5803/20678292043_0eda9db5cf_c.jpg

Here is one on I-49 near Joplin, MO.  Incidentally, it again exits itself upon splitting from I-44, so it does so twice.