Just curious if there's other examples of this. Either a freeway that lacks a common kind of interchange (diamond, cloverleaf, etc.) or only uses one broad type.
Example: Interstate 182 in the Tri-Cities region of Washington has no interchanges that don't include some kind of loop ramp. Two of them used to be diamond-only, but loop ramps were added fairly recently.
Quote from: Bruce on September 19, 2018, 10:14:32 PM
Just curious if there's other examples of this. Either a freeway that lacks a common kind of interchange (diamond, cloverleaf, etc.) or only uses one broad type.
Example: Interstate 182 in the Tri-Cities region of Washington has no interchanges that don't include some kind of loop ramp. Two of them used to be diamond-only, but loop ramps were added fairly recently.
IL's portion of I-24 in Southern IL only has Diamond Interchanges for its (few) exits. Its termination @ I-57 is some kind of Trumpet/Y Interchange Hybrid, kinda looking thing...
I'm guessing that "creative" termination was designed, with a thought of some (probably never to be) direct to STL Freeway I-24 extension across Southwestern IL
There are 20 interchanges along I-295 in Virginia. Of which only 5 of them are not full cloverleafs:
-The two endpoints, though one of them (Exit 53) was originally supposed to be one.
-a trumpet interchange at VA 895 (Exit 25).
-a diamond diamond interchange at SR 618 (Exit 16) just north of Hopewell. This one is designed to be upgraded to a cloverleaf in the future.
-the northern I-295/I-95 junction (Exit 43 A-B) is almost one except it has a directional ramp from 95 SB to 295 SB instead of a loop.
Interesting thread idea; I recall discussion along similar lines in another thread several months ago.
*The Lake Ontario State Parkway uses folded diamonds exclusively, with just one or two exceptions.
*NY 104 only has traditional diamonds (often involving slip ramps to and from the service road). The entire 13-mile freeway has exactly two loop ramps - both eastbound off-ramps -here (https://www.google.com/maps/@43.1911304,-77.6164877,17.77z) and here (https://www.google.com/maps/@43.2133435,-77.5142799,17.02z).
*The tolled segments of the NYS Thruway have only trumpet interchanges, which goes without saying.
Other than that, interchange types on all the other freeways around here are fairly varied. The only other noteworthy thing being that full cloverleaves are entirely absent from the entire Rochester metro (I-490 and NY 33 (https://www.google.com/maps/@43.1461435,-77.714834,15.66z) comes very close, but even it is incomplete - NY 33 WB to I-490 EB requires a left turn).
To answer the OP directly, yes, I-590, I-390, and the NY 531 and NY 104 freeways are entirely devoid of cloverleaves, and I'd say I-490 as well, except for the interchange linked to above. As such, NY's Finger Lakes Region probably has the lowest cloverleaves-per-capita in the nation; and I limit it just to the Finger Lakes because Buffalo is full of them - three on I-90, one on US 219, and, depending on technicalities, up to four (but at least two) on I-290.
I-355, Veterans Memorial Tollway (aka North-South Tollway), lacks any cloverleafs. There are a grand total of four loop ramps; one at Lake St, two at Army Trail Rd, and one at I-55. There are no SPUIs or DDIs either.
I-180 only has the following: diamond, three-level, and trumpet (at I-80).
IL-390 currently has diamonds and a three-level stack with two loops.
And to top that off, no four-level stacks exist anywhere in the entire state of Illinois.
Quote from: webny99 on September 20, 2018, 11:37:09 AM
*The tolled segments of the NYS Thruway have only trumpet interchanges, which goes without saying.
*ahem* (https://www.google.com/maps/@42.0831477,-73.9738008,901m/data=!3m1!1e3)
Quote
Other than that, interchange types on all the other freeways around here are fairly varied. The only other noteworthy thing being that full cloverleaves are entirely absent from the entire Rochester metro (I-490 and NY 33 (https://www.google.com/maps/@43.1461435,-77.714834,15.66z) comes very close, but even it is incomplete - NY 33 WB to I-490 EB requires a left turn).
To answer the OP directly, yes, I-590, I-390, and the NY 531 and NY 104 freeways are entirely devoid of cloverleaves, and I'd say I-490 as well, except for the interchange linked to above. As such, NY's Finger Lakes Region probably has the lowest cloverleaves-per-capita in the nation; and I limit it just to the Finger Lakes because Buffalo is full of them - three on I-90, one on US 219, and, depending on technicalities, up to four (but at least two) on I-290.
There used to be some. NY 47/US 104 (now NY 590/NY 404) was a cloverleaf until the loop ramps on the western half, as well as the entire northeastern quadrant, were removed and the remaining ramps realigned to support left turns. Half of what is now Warrenton Street was part of the ramps (the remainder of the street was inside the interchange). The ramp from NY 590 south was realigned (the original path is visible in the aerial imagery), but the other ramps are original to the interchange. I-490/NY 31F was also a cloverleaf, but only the southern half shows evidence of this. And, of course, the Thruway/NY 96, before the Thruway was made into a toll road.
Every single exit on the Warren Freeway/Route 13 in Oakland/Berkeley, except for the freeway's north terminus at Route 24, uses at least one ramp to or from a frontage road.
All of the portions of Route 58 that are freeway (including the Westside Parkway in Bakersfield) do not have a single full cloverleaf interchange. Same is true for all the freeway segments of Route 198.
Every interchange on Route 23 north of US 101 has a loop ramp, as all but one are full parclos. The junction with Route 118 is half-diamond, half-parclo.
I-105/Century Freeway (completed ca. 1992) does not have a single full cloverleaf interchange.
All of Route 15/Interstate 15 from start to finish (San Diego to Canada) does not have a full cloverleaf!
I don't think any roads in PA use only one interchange type. The Turnpike once qualified (with trumpets) but hasn't for decades since the "new" Mid-County and Virginia Drive interchanges were added.
Quote from: Brandon on September 20, 2018, 11:50:30 AM
I-355, Veterans Memorial Tollway (aka North-South Tollway), lacks any cloverleafs. There are a grand total of four loop ramps; one at Lake St, two at Army Trail Rd, and one at I-55. There are no SPUIs or DDIs either.
I-180 only has the following: diamond, three-level, and trumpet (at I-80).
IL-390 currently has diamonds and a three-level stack with two loops.
And to top that off, no four-level stacks exist anywhere in the entire state of Illinois.
Does not 355 have a loop ramp @ US 6 on the Will County Extension?
US 3 in Massachusetts has no standard diamonds with one segment in each quadrant.
I-93 in Massachusetts has only one (Exit 3).
Quote from: Roadsguy on September 20, 2018, 01:36:19 PM
I don't think any roads in PA use only one interchange type. The Turnpike once qualified (with trumpets) but hasn't for decades since the "new" Mid-County and Virginia Drive interchanges were added.
The window of time becomes even smaller when you consider that there was the old Carlisle Interchange (http://www.pahighways.com/graphics/maps/TPKexit10.jpg) (today's Carlisle Interchange was called Middlesex) that existed from 1940 until the Philadelphia Extension opened in 1950 and the original New Stanton Interchange (http://www.pahighways.com/graphics/maps/TPKexit2.jpg) with lasted from 1940-1964.
So the "trumpets-only" era ran from 1964-1992, 28 years out of the Turnpike's 78-year history.
Quote from: ilpt4u on September 20, 2018, 01:47:42 PM
Quote from: Brandon on September 20, 2018, 11:50:30 AM
I-355, Veterans Memorial Tollway (aka North-South Tollway), lacks any cloverleafs. There are a grand total of four loop ramps; one at Lake St, two at Army Trail Rd, and one at I-55. There are no SPUIs or DDIs either.
I-180 only has the following: diamond, three-level, and trumpet (at I-80).
IL-390 currently has diamonds and a three-level stack with two loops.
And to top that off, no four-level stacks exist anywhere in the entire state of Illinois.
Does not 355 have a loop ramp @ US 6 on the Will County Extension?
They're loops in that it's a folded diamond, not a parclo.
I-70 is the only interstate in Utah missing a SPUI.
There is only one full cloverleaf in the entire state of Utah, and that is the I-215 and SR-201 interchange in West Valley. There were previously a couple on I-15, but they were removed maybe ten years ago. One is now a standard diamond; the other is now an interesting design combining a diamond interchange with a Texas U-turn.
Quote from: Brandon on September 20, 2018, 03:03:18 PM
Quote from: ilpt4u on September 20, 2018, 01:47:42 PM
Quote from: Brandon on September 20, 2018, 11:50:30 AM
I-355, Veterans Memorial Tollway (aka North-South Tollway), lacks any cloverleafs. There are a grand total of four loop ramps; one at Lake St, two at Army Trail Rd, and one at I-55. There are no SPUIs or DDIs either.
I-180 only has the following: diamond, three-level, and trumpet (at I-80).
IL-390 currently has diamonds and a three-level stack with two loops.
And to top that off, no four-level stacks exist anywhere in the entire state of Illinois.
Does not 355 have a loop ramp @ US 6 on the Will County Extension?
They're loops in that it's a folded diamond, not a parclo.
I was always under the impression that a folded diamond was a type of parclo.
Quote from: US 89 on September 20, 2018, 03:07:19 PM
Quote from: Brandon on September 20, 2018, 03:03:18 PM
They're loops in that it's a folded diamond, not a parclo.
I was always under the impression that a folded diamond was a type of parclo.
A parclo functions like a cloverleaf with two missing ramps, while this type of interchange (https://www.google.com/maps/@43.1232675,-77.6487179,16.73z/data=!5m1!1e1) has no functional comparison to a cloverleaf. Functionally, it has much more in common with a diamond, just with loop ramps (meaning no getting off and right back on).
Quote from: vdeane on September 20, 2018, 01:05:57 PM
Quote from: webny99 on September 20, 2018, 11:37:09 AM
*The tolled segments of the NYS Thruway have only trumpet interchanges, which goes without saying.
*ahem* (https://www.google.com/maps/@42.0831477,-73.9738008,901m/data=!3m1!1e3)
Yeah, I figured someone would come up with a counter, but I couldn't think of any as I composed that post (and I've frustratingly never been on that segment of I-87).
QuoteThe ramp from NY 590 south was realigned (the original path is visible in the aerial imagery), but the other ramps are original to the interchange.
Interesting; I always wondered why that ramp to NY 590 South takes such a lopsided course with that 30 mph curve. It would've aided morning traffic flow (and evening, for that matter) if they'd straightened it so traffic could merge at-speed.
Quote from: TheStranger on September 20, 2018, 01:33:01 PM
Every single exit on the Warren Freeway/Route 13 in Oakland/Berkeley, except for the freeway's north terminus at Route 24, uses at least one ramp to or from a frontage road.
All of the portions of Route 58 that are freeway (including the Westside Parkway in Bakersfield) do not have a single full cloverleaf interchange. Same is true for all the freeway segments of Route 198.
Every interchange on Route 23 north of US 101 has a loop ramp, as all but one are full parclos. The junction with Route 118 is half-diamond, half-parclo.
I-105/Century Freeway (completed ca. 1992) does not have a single full cloverleaf interchange.
All of Route 15/Interstate 15 from start to finish (San Diego to Canada) does not have a full cloverleaf!
Caltrans has shied away from full cloverleaves for well over 30 years because of the conflicting traffic movement aspects of that design. Many of the previous cloverleaves have been converted to parclos (especially along US 101 in Santa Clara County); D4 is particularly "allergic" to them (the 101/880 interchange is a prime example of the limitations and/or hazards of that design). When it comes to C/D roads, it's clear that even when cloverleaves were being built, the additional space required for those additional lanes were considered inappropriate for urban construction. And the few freeway-to-freeway cloverleaves have almost all been modified with flyovers for the more heavily-trafficked movements (the 60/91/215 interchange in Riverside being a prime example of this; the 5/55 interchange in Tustin being another). The last freeway-to-freeway cloverleaf to be constructed in the state, the I-5/I-80 (originally the first I-880 iteration at time of construction) did utilize C/D lanes (they had the room to do so) as well as a single flyover ramp for the most heavily-trafficked direction otherwise consigned to a loop (WB 80>SB 5). At present, it's unlikely that any additional cloverleaves, C/D-equipped or not, will be deployed within the state in the near term, given the less than robust level of new facility development.
Curiously, very early examples of cloverleaves with C/D roads on the freeways could be found in the L.A. area on the San Bernardino/I-10 freeway between I-710 and Rosemead Blvd./CA 19(164); there were also a couple on I-5 in the Glendale/Burbank area at the Western Avenue and Alameda Avenue interchanges. Originally, the right lane in either direction (on a generally 4+4 arrangement) exited onto and became the C/D road with the original 1957 construction; a 4th through lane was added as part of the adjacent I-5/CA 134 freeway interchange project in the late 1960's.
I've noticed here in MA that the parclo is used extensively in this region of the state. Practically every exit on 6 and 3 are of this design.
The eastern part of I-696 (Between I-75 and I-94, except for Mound Rd.) exits onto and enter from the 11 Mile road service drive.
On Ontario 402, most if not all the 4-ramp interchanges are folded diamonds. There are some parclo interchanges with 5 or 6 ramps. But no regular diamonds. There's a lot of folded diamonds on 401 too.
Quote from: webny99 on September 20, 2018, 03:46:11 PM
Quote from: US 89 on September 20, 2018, 03:07:19 PM
Quote from: Brandon on September 20, 2018, 03:03:18 PM
They're loops in that it's a folded diamond, not a parclo.
I was always under the impression that a folded diamond was a type of parclo.
A parclo functions like a cloverleaf with two missing ramps, while this type of interchange (https://www.google.com/maps/@43.1232675,-77.6487179,16.73z/data=!5m1!1e1) has no functional comparison to a cloverleaf. Functionally, it has much more in common with a diamond, just with loop ramps (meaning no getting off and right back on).
It's still a parclo. Any interchange where one or more ramps involves a 180 turn is a parclo. At least for the purposes of this thread, as Bruce's OP (I-182 in WA) has a folded diamond (otherwise his statement that every interchange involves a loop would be false). "Folded diamond" is a type of parclo.
I don't think I've heard of anyone referring to a folded diamond as a parclo before this thread. The definitive guide (http://www.kurumi.com/roads/interchanges/index.html) has them in with diamonds.
^ Actually, the definitive guide you linked captions the illustration as "4-ramp partial cloverleaf variants" under the section heading "Diamonds and other 4-ramp interchanges".
From the Wikipedia article for
Partial cloverleaf interchange: (https://en.wikipedia.org/wiki/Partial_cloverleaf_interchange)
QuoteParclo designs with only two quadrants are commonly referred to as folded diamonds, due to their similarity with diamond interchanges.
Quote(https://upload.wikimedia.org/wikipedia/commons/thumb/2/29/Parclo_B2.svg/158px-Parclo_B2.svg.png)
B2 configuration for right-hand traffic, or A2 for left-hand traffic. Also known as a folded diamond.
Quote(https://upload.wikimedia.org/wikipedia/commons/6/62/Halfklaverbladaansluiting.png)
A parclo AB2 interchange or folded diamond
DE-1 does not have any full cloverleafs across its entire length. There are a couple instances where it has 3 loop ramps, but never all four at once.
In Maryland, none of the two-digit Interstates except for I-70 have any SPUIs, and none of them except for I-70 and I-95 have four-level stack interchanges of any sort.
M-6 has no traditional diamonds at all. There are two five-ramp parclos, two six-ramp parclos, a cloverleaf with C-D roads on both freeways (US-131), a SPUI, and two directional Ts (one at each end)
In Arizona:
US 60 has no SPUI's along its 27 miles of freeway. It's all diamond or diamond variants (two half diamonds, one folded half diamond, IIRC)
There are no DDI interchanges in the state of Arizona, though there is talk of putting one in at Houghton Road and I-10 in Tucson. Along with a monstrosity at Happy Valley Road and I-17 that would allow through traffic on the frontage roads to pass via some convoluted movements.
I also can't think of any full cloverleafs that exist on any interstate in Arizona.May have been at some point in the past, but if so they've long since been rebuilt.
Technically I-15 passes through Arizona, and it has nothing but diamond interchanges.
I684 in CT only uses one interchange type...None
I-295 in NJ has 52 or so interchanges over its 76 miles of highway. Only 1 would qualify as a Diamond (Exit 7), and even that one gives the appearance that a partial cloverleaf may have been planned for it. https://goo.gl/maps/U7Xwb2TKhGG2
Quote from: mrcmc888 on September 21, 2018, 09:34:35 PM
DE-1 does not have any full cloverleafs across its entire length. There are a couple instances where it has 3 loop ramps, but never all four at once.
As it happens, the only such example of a complete cloverleaf on I-95 in Delaware would've been with DE 1.
And thus, I-95 in Delaware doesn't have any cloverleafs either.
There are no SPUIs or DDIs in all of Spain (at least that I'm aware of).
I-64/US 40 in St Louis has consecutive SPUIs, Kingshighway and Hampton Av
Quote from: skluth on September 24, 2018, 10:21:55 PM
I-64/US 40 in St Louis has consecutive SPUIs, Kingshighway and Hampton Av
I-15 in Utah laughs at that. There are
seven consecutive SPUIs in a row on 15 south of Salt Lake City: 146th South, Bangerter, 123rd, 114th, 106th, 90th, and 72nd South. If you don't count the full freeway interchange at I-215, then that bumps up to 10 in a row, with 53rd, 45th, and 33rd South.
Quote from: roadiejay on September 24, 2018, 01:43:40 AM
In Arizona:
US 60 has no SPUI's along its 27 miles of freeway. It's all diamond or diamond variants (two half diamonds, one folded half diamond, IIRC)
There are no DDI interchanges in the state of Arizona, though there is talk of putting one in at Houghton Road and I-10 in Tucson. Along with a monstrosity at Happy Valley Road and I-17 that would allow through traffic on the frontage roads to pass via some convoluted movements.
I also can't think of any full cloverleafs that exist on any interstate in Arizona.May have been at some point in the past, but if so they've long since been rebuilt.
Technically I-15 passes through Arizona, and it has nothing but diamond interchanges.
For AZ 51, almost every full interchange with a surface street is a SPUI. The only exception is at Northern Ave. The other interchanges are either half diamonds or freeway-to-freeway at either end.
A couple DDIs are under construction on the Loop 202 South Mountain Freeway. Technically, they will only be half DDIs, since the current cross streets only exist on one side of the future freeway.
The IL 53 freeway in Chicagoland from I-90 to the north end at Lake Cook Road does not have a single full diamond interchange. There's two half diamonds, three full cloverleads (including the one at I-90), two folded diamonds, one trumpet, and and one one-loop partial cloverlead.
I-270 in Missouri does not have any folded diamonds currently (one is/was under consideration at Exit 34/Riverview). In the future it may not have any full cloverleafs either - the only remaining one at MO 367 will go whenever MoDOT gets funding to redo the interchange.
I-37
No cloverleaf, only one parclo.
Quote from: Roadwarriors79 on October 21, 2018, 08:46:57 PM
Quote from: roadiejay on September 24, 2018, 01:43:40 AM
In Arizona:
US 60 has no SPUI's along its 27 miles of freeway. It's all diamond or diamond variants (two half diamonds, one folded half diamond, IIRC)
There are no DDI interchanges in the state of Arizona, though there is talk of putting one in at Houghton Road and I-10 in Tucson. Along with a monstrosity at Happy Valley Road and I-17 that would allow through traffic on the frontage roads to pass via some convoluted movements.
I also can't think of any full cloverleafs that exist on any interstate in Arizona.May have been at some point in the past, but if so they've long since been rebuilt.
Technically I-15 passes through Arizona, and it has nothing but diamond interchanges.
For AZ 51, almost every full interchange with a surface street is a SPUI. The only exception is at Northern Ave. The other interchanges are either half diamonds or freeway-to-freeway at either end.
A couple DDIs are under construction on the Loop 202 South Mountain Freeway. Technically, they will only be half DDIs, since the current cross streets only exist on one side of the future freeway.
There was no loop ramps on the Superstition Freeway until a few years ago, just a nice consistent pattern of Urban Diamond interchanges... Then they opened the bastard at Meridian Road.
No SPUIs on I-64 in Kentucky. Also, none of which I'm aware on I-65 or I-71. None on I-24 either. The only SPUI on a parkway is on the new Natcher Parkway extension (now a signed KY 900x route with the advent of I-165) and it's hardly urban; it's in the middle of a cornfield.
No diverging diamonds at present on any interstate or parkway in Kentucky except US 60 at I-24 in Paducah.
Is it cheating to mention I-335 in Kansas?
In the East Bay, CA, Interstates 580, 205, 238 and 980 have no full cloverleaves or SPUIs. 205 has no parclos with more than 1 loop ramp. Route 85 in Santa Clara County also has no full cloverleaves (it has one parclo with 4 loop ramps but it is missing a right-turn ramp). Interstate 505 in the North Bay only has diamond interchanges and A4 parclos with the exception of its two ends.
Houston is a really good example of this. Every single freeway-freeway junction is a stack (or planned to become a stack). Only three cloverleafs exist in the Houston Metro. Two of them are in the Woodlands, and one of them is on a surface street.
Also, I don't think Houston has any parclos or DDis or SPUIs. Just feeder roads and stacks.
Quote from: CoreySamson on May 08, 2020, 02:16:57 PM
Also, I don't think Houston has any parclos or DDis or SPUIs. Just feeder roads and stacks.
There is a frontage road parclo on 59/69 at FM 762 in Rosenberg: https://goo.gl/maps/CaKUUrAVZafjar5L9
Looks like with the recent widening and reconstruction they tightened the ramps into more of a RIRO situation, but functionally I'd say it's still a parclo.
I-270, the STL beltway, only has one full cloverleaf now (367 in North County). There used to be more, at 44 (reconstructed in 90s), 64 (always referred to locally as "40" by the US route, rebuilt in 90s), the Page extension (one cloverleaf removed in favor of flyover in early 2010), and 67 (one clover removed in 2013). There's also one SPUI (Olive), one DDI (Dorsett), and no Cali-style parclos (although some with one loop ramp, like Telegraph and Koch).
Nevada I-580: There is not a single standard diamond interchange in Carson City, with the first full regular diamond configuration being exit 16 (about 6-7 miles north of Carson City). In fact, for the ~36 miles of I-580, there are 21 interchanges and only 3 of them are standard diamonds. (There were formerly 5 standard diamonds–one was converted to a DDI, and another is now part of a split diamond.)
Quote from: roadfro on May 17, 2020, 02:32:45 PM
Nevada I-580: There is not a single standard diamond interchange in Carson City, with the first full regular diamond configuration being exit 16 (about 6-7 miles north of Carson City). In fact, for the ~36 miles of I-580, there are 21 interchanges and only 3 of them are standard diamonds. (There were formerly 5 standard diamonds–one was converted to a DDI, and another is now part of a split diamond.)
I've noticed that Nevada is really split in its interchange designs. Up in the Carson City and Reno area, there seems to be far less diamonds and more parclos, SPUIs, or other configurations, compared to the Vegas area where diamonds seem to be the most common (and by a large margin).
More examples in Delaware- DE-141, I-495, and US 301 all lack cloverleafs.
There might not even be a cloverleaf intersection in the state of Delaware, depending on if this intersection on I-295 counts as one or not.
https://www.google.com/maps/@39.6970466,-75.5523041,15z (https://www.google.com/maps/@39.6970466,-75.5523041,15z)
Quote from: jakeroot on May 17, 2020, 02:48:55 PM
Quote from: roadfro on May 17, 2020, 02:32:45 PM
Nevada I-580: There is not a single standard diamond interchange in Carson City, with the first full regular diamond configuration being exit 16 (about 6-7 miles north of Carson City). In fact, for the ~36 miles of I-580, there are 21 interchanges and only 3 of them are standard diamonds. (There were formerly 5 standard diamonds–one was converted to a DDI, and another is now part of a split diamond.)
I've noticed that Nevada is really split in its interchange designs. Up in the Carson City and Reno area, there seems to be far less diamonds and more parclos, SPUIs, or other configurations, compared to the Vegas area where diamonds seem to be the most common (and by a large margin).
I've not really thought about that before you mentioned it. And I don't have a good explanation as to why, other than right-of-way considerations. I have a hunch that some of it may be related to more of the Las Vegas area's freeway network either being older or being planned out further in advance in lesser-developed areas of town (so right-of-way for standard diamonds could be acquired more in advance).
Another fun fact: Within Reno, Virginia St has five freeway interchanges, four with US-395/I-580 and one with I-80. Only the I-80 interchange is a diamond (and it's a split diamond at that, because the ramps also intersect two other downtown streets). The others on US 395/I-580 are a trumpet, a half diamond, and two parclos--and they are all vestiges of Virginia St being old US 395 and those particular interchanges being a point at which the then-new US 395 freeway previously had a temporary end.
Here's a fun one: you can drive 158 miles of I-94 eastbound from exit 6 just outside of Moorhead to exit 164 in Waite Park without encountering an interchange loop ramp of any kind; no par-clos or even folded diamond ramps. Just standard diamonds and the occasional half-diamond. I-94 westbound is almost as impressive, but a folded entrance ramp at exit 100 in Alexandria spoils it. The "record" for this stretch historically would have been slightly longer at 165 miles in each direction, from exit 1 in Moorhead all the way to exit 167 near St. Cloud both east and westbound. C'mon exit 100... why'd you have to mess it all up?
Quote from: GaryV on September 20, 2018, 09:48:20 PM
On Ontario 402, most if not all the 4-ramp interchanges are folded diamonds. There are some parclo interchanges with 5 or 6 ramps. But no regular diamonds. There's a lot of folded diamonds on 401 too.
The first three interchanges in Sarnia are modified Parclos, with some diamond/J-ramp elements included on the south sides due to development. The rest are all Parclo-A (loop ramp on near side of the cross road), with a handful of Parclo-B (far side loop ramp) configurations at Hwy 40 and in the Strathroy area.
Just updating for Arizona. There are two half-DDI interchanges on Loop 202 at Desert Foothills Pkwy and 17th Ave. I-17 and Happy Valley Rd will be a full DDI when construction is done either late this year or sometime next year.
Interstate 70 between I-64 in Wentzville and I-470 in Independence. Almost the entire interstate has diamond interchanges (even those with major expressways and even a "Breezewood" situation in Columbia with US 63). I think there is one cloverleaf and one DDI the entire distance as the two lone exceptions.
There are only two traditional cloverleaves (cloverleafs?) in Wisconsin - I-39/90/94 and US-151 in Madison, and I-43 and WI-23 in Sheboygan. Do any states have less?
Quote from: thspfc on June 25, 2020, 11:15:19 AM
There are only two traditional cloverleaves (cloverleafs?) in Wisconsin - I-39/90/94 and US-151 in Madison, and I-43 and WI-23 in Sheboygan. Do any states have less?
Unless I'm missing something, Alaska has zero cloverleaf interchanges. Fairbanks comes really close with a six-ramp ParClo, but I can't locate the real deal anywhere in the state.
Quote from: kphoger on June 25, 2020, 12:33:10 PM
Quote from: thspfc on June 25, 2020, 11:15:19 AM
There are only two traditional cloverleaves (cloverleafs?) in Wisconsin - I-39/90/94 and US-151 in Madison, and I-43 and WI-23 in Sheboygan. Do any states have less?
Unless I'm missing something, Alaska has zero cloverleaf interchanges. Fairbanks comes really close with a six-ramp ParClo, but I can't locate the real deal anywhere in the state.
Ha, I should've thought of Alaska. Maybe Hawaii has fewer as well.
Quote from: thspfc on June 25, 2020, 03:32:28 PM
Quote from: kphoger on June 25, 2020, 12:33:10 PM
Quote from: thspfc on June 25, 2020, 11:15:19 AM
There are only two traditional cloverleaves (cloverleafs?) in Wisconsin - I-39/90/94 and US-151 in Madison, and I-43 and WI-23 in Sheboygan. Do any states have less?
Unless I'm missing something, Alaska has zero cloverleaf interchanges. Fairbanks comes really close with a six-ramp ParClo, but I can't locate the real deal anywhere in the state.
Ha, I should've thought of Alaska. Maybe Hawaii has fewer as well.
That might be correct. I-H1 Exit 24B comes close, but no cigar.
Quote from: thspfc on June 25, 2020, 11:15:19 AM
There are only two traditional cloverleaves (cloverleafs?) in Wisconsin - I-39/90/94 and US-151 in Madison, and I-43 and WI-23 in Sheboygan. Do any states have less?
Isn't there also one at I-43 and US-12 in Elkhorn? Unless you don't count the C/D lanes on US-12 as being "traditional".
I-5 in California doesn't have any traditional SPUIs, though there are a couple of offset SPUIs in Anaheim.
Quote from: EpicRoadways on June 25, 2020, 06:57:56 PM
Quote from: thspfc on June 25, 2020, 11:15:19 AM
There are only two traditional cloverleaves (cloverleafs?) in Wisconsin - I-39/90/94 and US-151 in Madison, and I-43 and WI-23 in Sheboygan. Do any states have less?
Isn't there also one at I-43 and US-12 in Elkhorn? Unless you don't count the C/D lanes on US-12 as being "traditional".
The Sheboygan interchange has C/D lanes on I-43 while the Madison interchange also has C/D lanes and another half-diamond using the same C/D lanes on the interstate triplex, so I don't think it's a problem. The I-39/90 and I-43/WI 81 interchange was a traditional cloverleaf, but I believe it's in the middle of being reconstructed with a new design. It looks really strange, but US 53 and WI 29 near Chip Falls qualifies. I-94 and US 53 in Eau Claire also is if you don't mind a stop sign at the end of a ramp. I believe the I-90 and US 53 interchange in La Crosse used to be one, but it's been 35 years since I was in LaCrosse and I was really drunk that weekend so my memory may be faulty.