Really long interchanges

[thenetwork]

Due to crossing over a series of roadways and railroad tracks, there are a few good long ramps connecting I-71 with SR-237 and I-480 right next to Cleveland Hopkins Airport:

http://maps.google.com/maps?q=CLE&hl=en&ll=41.42059,-81.827202&spn=0.021175,0.034547&sll=38.997934,-105.550567&sspn=5.617047,8.843994&t=h&hq=CLE&z=15

Interestingly, the half-diamond ramps from SR-237 to SR-17 and the bridge over SR-17 to/from I-71 are recycled remnants for the original SR-237/SR-17 cloverleaf interchange.  When I-71 and the proposed I-480 came into play in the mid-60s, SR-237 (Rocky River Drive) was "relocated" to allow the direct connection to I-71.

[The High Plains Traveler]

Here is an interchange http://goo.gl/maps/IDEQ6 with I-25 and CO-105 in Monument, Colorado, distorted to protect the habitat of the Preble's jumping mouse within the loops. 

[NE2]

Shit. We all forgot about the I-64 east/I-77 south split.

[COLORADOrk]

I-76 east to I-25 north - Denver area / Adams County, Colo. I believe this ramp has its own mile markers going up to 1.4 (?)

[Roadsguy]

Depending on how you define a single interchange, this may count.

[1995hoo]

This morning I found myself thinking about Exit 11 on the New Jersey Turnpike, so I loaded a map and measured it. The distance from just north of the gore on the southbound Turnpike's outer roadway to the point where you merge onto the southbound Garden State Parkway is about 1.9 miles, although I guess if you want to get technical you could drop the starting point at the end of the solid lines separating the exit ramp lanes from the mainline on each road. If you do that, it's 2 miles.

[vdeane]

There are a couple Thruway interchanges where the ramps themselves are really long.  Exits 33, 34A, and 58 come to mind.  Exit 24 also takes a while to traverse due to the I-90 flyovers.

Exit 24 is definitely protracted. As for the other three, those never struck me as being very long, but on the other hand Exit 25A is slightly stretched out along the Thruway to accommodate a railroad overpass, and Exit 39 similarly so.

Lots of good examples given of some highly braided urban interchanges...are there any more isolated rural ones, perhaps due to topography?

Those last ones are a slightly different category: not long in terms of the length on the main highway, but long in terms of time on the ramp from the highway to the local road.  Not quite what you were looking for, but similar, which is why I mentioned them.  Though 33 doesn't feel as long now that I've actually traveled through it.

[Mr_Northside]

While not winning any awards, the ramp from I-68 WB to US-219 NB in western Maryland helps make that interchange pretty long for a simple diamond.

http://goo.gl/maps/l4jPC

[sandwalk]

Rockford, IL (US 20 / I-39): http://goo.gl/maps/xeyht
Combining the ramps with the center-lane solid stripe (no passing zone), the WB US 20 to SB I-39 'interchange' is nearly 2 miles long. Also, I-39 NB to US 20 WB is close to 1.5 miles in length.

But eventually the eastern half of the Rockford bypass will be reconfigured by adding lanes and eliminating the one-lane I-39 'exit'....but who knows when that will be!
http://www.dot.state.il.us/US20rockford/index.html

[thenetwork]

Youngstown, OH:

https://maps.google.com/maps?q=Youngstown,+OH&hl=en&ll=41.107425,-80.832167&spn=0.018367,0.052314&sll=39.08104,-77.185135&sspn=0.151375,0.41851&oq=youngstown&hnear=Youngstown,+Mahoning,+Ohio&t=k&z=15

Coming from Mahoning Avenue (Old SR-18), using the old Ohio Turnpike Exit 15 ramps, the ramp crosses under the Mahoning-bound ramp, loops to parallel I-76 EB, merges with the I-76 EB ramp to the Ohio Turnpike, loops around thru the toll booths and then onto I-80 WB or another loop to EB I-76.

Honorable Ohio Turnpike mentions go to Exit 161 if you wish to direct access US-42/Pearl Road from the Turnpike, again, using a portion of an older interchange:

https://maps.google.com/maps?q=strongsville,+OH&hl=en&ll=41.33585,-81.825099&spn=0.009151,0.026157&sll=41.107425,-80.832167&sspn=0.018367,0.052314&t=k&hnear=Strongsville,+Cuyahoga,+Ohio&z=16

BTW, speaking of the original Exit 10, which was somewhat "decommissioned in the mid 60s", the original pavement and guardrails from possibly as far back as 1955 when the Turnpike opened are still in use per GSV:

https://maps.google.com/maps?q=strongsville,+OH&hl=en&ll=41.337593,-81.825407&spn=0.003235,0.006539&sll=41.107425,-80.832167&sspn=0.018367,0.052314&t=k&hnear=Strongsville,+Cuyahoga,+Ohio&z=18&layer=c&cbll=41.337593,-81.825407&panoid=9edlANDPXLf8fC_ytom3NA&cbp=12,254.09,,0,18.46


And Exit 173 if you wish direct access to I-77 from the Pike:

https://maps.google.com/maps?q=richfield,+OH&hl=en&ll=41.273968,-81.629362&spn=0.01832,0.052314&sll=41.337593,-81.825407&sspn=0.003258,0.006539&t=k&hnear=Richfield,+Summit,+Ohio&z=15

[thenetwork]

While not winning any awards, the ramp from I-68 WB to US-219 NB in western Maryland helps make that interchange pretty long for a simple diamond.

http://goo.gl/maps/l4jPC

Ooh and remnants of not one but TWO old Westbound off-ramps at that interchange!!

[empirestate]

Those last ones are a slightly different category: not long in terms of the length on the main highway, but long in terms of time on the ramp from the highway to the local road.  Not quite what you were looking for, but similar, which is why I mentioned them.  Though 33 doesn't feel as long now that I've actually traveled through it.

Well actually, the more examples I see (such as the Ohio Turnpike ones), I think there's yet another class of stretchy interchanges: not only the mainline distance between the most widely-separated ramp gores, but also including the crossing of the intersecting route, which in folded-type interchanges may be well beyond where the ramps intersect the mainline.

But I am definitely interested in overall interchange length, be it from first ramp to last ramp, or from first ramp to crossing of the intersecting route, rather than individual long ramps.

[theline]

I suppose this one doesn't quite qualify, because it's all about a really long ramp and not so long on the main road. Here goes anyway: http://goo.gl/maps/T9lOY

It's the SR-933 & Business US-31 interchange with the Indiana Toll Road (exit 77). The ramp extends south from ITR, looping around the entire town of Roseland, to reach the highway just north of the Notre Dame campus, a trek of 1.2 miles.

[roadman65]

The Boggy Creek Road interchange (Exit 17) on TOLL FL 417 has long diamond ramps to the east (north) to allow future expansion of South Airport Boulevard, that is one day to connect directly with FL 417 instead of the current interchange with Boggy Creek Road to the north of Exit 17.  This is supposed allow the flyovers from that project to merge with the existing ramps to use the same toll facilities.

Also, the exits for FL 46, FL 417, and CR 46A is actually one big giant interchange, hence each one being Exit 101 with A for CR 46A, B for FL 417, and C for FL 46 due to the way the ramps are laid out for the three to prevent local interaction between each of the three intersecting roadways.    It is so long that the first westbound exit and the last merge eastbound are withing a mile of Exit 104.   Technically FL 46 should be Exit 103.

[bassoon1986]

High 5 Interchange in Dallas is the best example I can think of around here. The longest ramp is from I-635 westbound to US 75 southbound, which is about 1.9 miles.

The TX 114/121 aka "Funnel" at DFW airport would probably be a contender but construction is still going on strong there and I doubt any of the interwebs have updated map imagery there.

[MASTERNC]

How about the ramp from I-95 NB to the Philadelphia International Airport?  You cross I-95 twice.

https://maps.google.com/maps?q=Philadelphia+International+Airport,+Essington+Avenue,+Philadelphia,+PA&hl=en&ll=39.876052,-75.245104&spn=0.017422,0.038581&sll=40.042158,-75.391189&sspn=0.01738,0.038581&oq=Philadelp&t=h&hq=Philadelphia+International+Airport,+Essington+Avenue,+Philadelphia,+PA&z=15

[Alps]

How about I-95/295/495 in Delaware? https://maps.google.com/?ll=39.706295,-75.597181&spn=0.016838,0.035791&t=m&z=15 The first ramp starts south of the 141 interchange, and the last extends well north of the 495 split.

[deathtopumpkins]

Would NJTP Exit 15X (Secaucus Junction) count?

2.0 miles from where the northbound offramp branches off the NJTP to where Turnpike maintenance ends at the train station entrance ("South Rd"). And 2.4 miles for the northbound onramp.

[PHLBOS]

How about the ramp from I-95 NB to the Philadelphia International Airport?  You cross I-95 twice.

https://maps.google.com/maps?q=Philadelphia+International+Airport,+Essington+Avenue,+Philadelphia,+PA&hl=en&ll=39.876052,-75.245104&spn=0.017422,0.038581&sll=40.042158,-75.391189&sspn=0.01738,0.038581&oq=Philadelp&t=h&hq=Philadelphia+International+Airport,+Essington+Avenue,+Philadelphia,+PA&z=15

That ramp was added in 2000-2001 as part of the Terminal A-West project that extended/relocated the ramps to the Departures Roadway further west.  Taxicab drivers in Delaware County refer to that exit ramp off I-95 North (Exit 12) as the $5 fare ramp meaning that a cab fare is about $5 more vs. using the old-school Exit 10 ramp to get to the terminals.

[empirestate]

Would NJTP Exit 15X (Secaucus Junction) count?

It's gotta count for something, it's so weird.

[jeffandnicole]

I'm liking the new ramps to the Service Plaza just south of Exit 7A of the NJ Turnpike.  The ramp from the inner drive (car lanes) to the northbound plaza, and from the southbound plaza to the inner drive, will be nearly a mile in length. The ramps will involve going over the outer drive (truck lanes) and underneath Yardville-Allentown Rd. before connecting with the service plaza.

[roadman65]

Speaking of the NJ Turnpike, how about Exit 13 in Elizabeth?  That would be a long one between the Northbound exit diverge to the Northbound entrance merge and between the SB Exit split and SB Entrance confluence as well.  Remember both the Goethals Bridge and Staten Island Railroad cause the ramps to be extended as well as the Chemical Coast Freight Line to the east of the Turnpike prevented a proper trumpet from being built, so you have extended ramps from both ways.

Also the tangle on the other side of the toll plaza would add to it in another way.

[PHLBOS]

In Baltimore, MD; the ramp from I-395 South (Cal Ripken Way) to I-95 North runs fairly long (and fairly high in altitude) as well.  Also, the ramp from I-95 South to MD 295 (BW Parkway) South.

http://www.bing.com/maps/#JnE9LmhhaW5lcyUyYnN0JTI1NDAyJTJiYmFsdGltb3JlJTI1MmMlMmJtZCU3ZXNzdC4wJTdlcGcuMSZiYj0zOS4yNzY3MjE2MDQ0OTAzJTdlLTc2LjYxMzc3MzQ2NTE1NjYlN2UzOS4yNjYzNzI2MDQ3NDIxJTdlLTc2LjYzMTY5MDYyMTM3Ng==

[roadman65]

I forgot the one in Celebration, FL where I-4 and the southern terminus of FL 417 meet.  Despite the c/d road that is there, the point of diversion from the c/d road and FL 417 to the point where FL 417 departs I-4 is long itself.  In addition to the 1 mile of c/d road you have another 3/10 of a mile to go for something as simple as a typical directional set up.

[PurdueBill]

And Exit 173 if you wish direct access to I-77 from the Pike:

https://maps.google.com/maps?q=richfield,+OH&hl=en&ll=41.273968,-81.629362&spn=0.01832,0.052314&sll=41.337593,-81.825407&sspn=0.003258,0.006539&t=k&hnear=Richfield,+Summit,+Ohio&z=15

When I use that interchange coming from the west to head south, I go the "old way" and exit the interchange to access 21 instead of following the signage for 77, then south on 21 and follow that onto 77 south.  It saves 3/4 mile according to my odometer and Google maps.  Especially if you have a truck ahead of you that will need to go slowly through the u-shaped ramp as it enters 77 south, you can frequently find that the truck is way behind you when you are on 77, even with the 270-degree loop onto 77 from 21.