Seems like this would have been a topic sometime back...
Where are the notable 5+ level stacks?
The Dallas High-5 is the obvious one.
I'll throw in the Pasadena Interchange (I-210/CA 134/710)
http://www.openstreetmap.org/#map=17/34.15029/-118.15563&layers=Q
The Century/Harbor Stack (I-105/110)
http://www.openstreetmap.org/#map=17/33.92838/-118.28110&layers=Q
The Fremont Stack (I-5/405/US 30) might get by on the technicality that I-405 is double decked; the unbuilt movements don't help. Note that the ground level (Mississippi Ave, Interstate Ave) doesn't interact with the upper levels.
http://www.openstreetmap.org/#map=17/45.54417/-122.67502&layers=Q
I'm sure there are others lurking about.
Does the I-75/I-20 stack in downtown Atlanta come to 5 levels at any point?
Marquette Interchange in Milwaukee (I-43/94/794)
Quote from: Bickendan on February 25, 2015, 02:55:17 PM
The Fremont Stack (I-5/405/US 30) might get by on the technicality that I-405 is double decked; the unbuilt movements don't help. Note that the ground level (Mississippi Ave, Interstate Ave) doesn't interact with the upper levels.
http://www.openstreetmap.org/#map=17/45.54417/-122.67502&layers=Q
I'd call this 4.5-level, since the double-decker roadways have partly gone to a single level by the time the top-level ramp crosses over them.
Quote from: lepidopteran on February 25, 2015, 03:03:44 PM
Does the I-75/I-20 stack in downtown Atlanta come to 5 levels at any point?
It doesn't even reach 4 levels. I-85/I-285 might be another 4.5, depending on how low the eastbound-to-northbound ramp is where the southbound C/D road crosses over it.
The Sam Houston Tollway has several, though some might be only 4.5, since the SHT starts coming down from level 2 by the time the left turns cross over it.
Texas has a bunch, most involving toll roads.
DFW: I-35E/Sam Rayburn Tollway (half stack), Dallas North Tollway/SRT, I-30/President George Bush Turnpike (once fully constructed), I-20/Chisholm Trail Parkway (future, 5th level ramps are planned but not built), and of course the High Five.
Austin: I-35/SH 45 North, US 183/SH 45 North, US 183/US 290, and I-35/US 290 North (all half stacks), I-35/US 290 South/SH 71
San Antonio: US 281/Loop 1604 (half)
Houston: I-10/SH 99 West, Tollway/I-45 North, Tollway/US 59 (I-69) North, Tollway/I-10 East, Tollway/I-45 South, Tollway/US 59 (I-69) South, Tollway/US 290
Quote from: dfwmapper on February 26, 2015, 02:44:54 AM
Texas has a bunch, most involving toll roads.
DFW: I-35E/Sam Rayburn Tollway (half stack), Dallas North Tollway/SRT, I-30/President George Bush Turnpike (once fully constructed), I-20/Chisholm Trail Parkway (future, 5th level ramps are planned but not built), and of course the High Five.
Austin: I-35/SH 45 North, US 183/SH 45 North, US 183/US 290, and I-35/US 290 North (all half stacks), I-35/US 290 South/SH 71
San Antonio: US 281/Loop 1604 (half)
Houston: I-10/SH 99 West, Tollway/I-45 North, Tollway/US 59 (I-69) North, Tollway/I-10 East, Tollway/I-45 South, Tollway/US 59 (I-69) South, Tollway/US 290
In, I think, all of these cases, there's an added level due to frontage roads. I don't know if that should be counted, since it isn't part of the freeway-to-freeway interchange, but is effectively a separate road system intersecting within the interchange grounds. If it should be counted as a level, should it be disregarded for comparison since most other areas don't use frontage roads as much? Is an interchange that's in every other way the same less impressive because of the lack of frontage roads?
As a definite 5-level, there's I-35W at I-20. The north-south frontage roads are on the ground, at the same level as I-35W, and the east-west frontage roads are broken, so there's no added level. There are two levels of freeways under three levels of ramps. The other examples have two levels of freeways under two levels of ramps, or a different arrangement, with a level of frontage roads added.
Actually, the SHT/I-45 interchange is interesting. Disregarding frontage roads, the northbound to westbound ramp crosses over a ramp that crosses over I-45, and is then crossed over by another, third level ramp. The ramp it crosses over is at about the same elevation as the SHT main lanes, so there are three levels of ramps, but one of them (westbound to southbound) may be the same level as SHT. Excluding frontage roads, I'd say this is a 4-level with a characteristic (three ramp levels) of a 5-level.
I see no reason to disregard due to frontage roads. It's five levels of roadway at one location. Especially since frontage roads are actually part of a given route, I say traffic on them is just as much a part of the highway as that on the mainline.
If you discount frontage roads, the Dallas High Five is only four levels. You should also discount other surface roads, so the Marquette Interchange doesn't count.
Not sure if the northern I-695/I-95 interchange in Maryland (https://www.google.com/maps/@39.351689,-76.497534,3a,90y,122.65h,63.65t/data=!3m4!1e1!3m2!1syKOwkPWmF1T66-G3eP5lzA!2e0!5m1!1e1) counts as 4 or 5. Also, this one in East Orange, NJ (https://www.google.com/maps/place/East+Orange/@40.7589743,-74.2071381,17z/data=!4m2!3m1!1s0x89c254b114ed3fbd:0x1dc0619cb493bb5c!5m1!1e1) especially if you count the railroad (which is elevated above the entire interchange).
Quote from: bzakharin on February 26, 2015, 11:44:05 AM
Not sure if the northern I-695/I-95 interchange in Maryland (https://www.google.com/maps/@39.351689,-76.497534,3a,90y,122.65h,63.65t/data=!3m4!1e1!3m2!1syKOwkPWmF1T66-G3eP5lzA!2e0!5m1!1e1) counts as 4 or 5.
I only see four levels - standard stack.
Quote from: bzakharin on February 26, 2015, 11:44:05 AM
Also, this one in East Orange, NJ (https://www.google.com/maps/place/East+Orange/@40.7589743,-74.2071381,17z/data=!4m2!3m1!1s0x89c254b114ed3fbd:0x1dc0619cb493bb5c!5m1!1e1) especially if you count the railroad (which is elevated above the entire interchange).
Huh? That's only three levels at any point.
Quote from: NE2 on February 26, 2015, 11:51:46 AM
Quote from: bzakharin on February 26, 2015, 11:44:05 AM
Also, this one in East Orange, NJ (https://www.google.com/maps/place/East+Orange/@40.7589743,-74.2071381,17z/data=!4m2!3m1!1s0x89c254b114ed3fbd:0x1dc0619cb493bb5c!5m1!1e1) especially if you count the railroad (which is elevated above the entire interchange).
Huh? That's only three levels at any point.
Railroad, Main Street, ramp, Oraton Parkway, Garden State Parkway, I-280. The first 2 or the second 2 are on the same level at any given time, which makes 5
Quote from: bzakharin on February 26, 2015, 12:06:36 PM
Quote from: NE2 on February 26, 2015, 11:51:46 AM
Quote from: bzakharin on February 26, 2015, 11:44:05 AM
Also, this one in East Orange, NJ (https://www.google.com/maps/place/East+Orange/@40.7589743,-74.2071381,17z/data=!4m2!3m1!1s0x89c254b114ed3fbd:0x1dc0619cb493bb5c!5m1!1e1) especially if you count the railroad (which is elevated above the entire interchange).
Huh? That's only three levels at any point.
Railroad, Main Street, ramp, Oraton Parkway, Garden State Parkway, I-280. The first 2 or the second 2 are on the same level at any given time, which makes 5
By that logic, this is an infinite-level interchange:
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fopengeofiction.net%2Fosm_tiles%2F17%2F76394%2F77060.png&hash=3d664e0c4674186c1dd5255f01ffd887ddec7b02)
Quote from: bzakharin on February 26, 2015, 12:06:36 PM
Quote from: NE2 on February 26, 2015, 11:51:46 AM
Quote from: bzakharin on February 26, 2015, 11:44:05 AM
Also, this one in East Orange, NJ (https://www.google.com/maps/place/East+Orange/@40.7589743,-74.2071381,17z/data=!4m2!3m1!1s0x89c254b114ed3fbd:0x1dc0619cb493bb5c!5m1!1e1) especially if you count the railroad (which is elevated above the entire interchange).
Huh? That's only three levels at any point.
Railroad, Main Street, ramp, Oraton Parkway, Garden State Parkway, I-280. The first 2 or the second 2 are on the same level at any given time, which makes 5
At most, you could call this a 4, but that's at the southern interchange point. The eastern point is a three, and where the two highways actually cross is also a three: Main St and railroad are top level (3), GSP and Oraton are mid level (2), and I-280 and its C/D ramps are bottom level (1).
My reason for excluding frontage roads (maybe not for level count purposes, but for comparative purposes) is that it gives a biased advantage toward places that use frontage roads. Texas will naturally have more five-levels because we have so many frontage roads. Does that mean we like bigger interchanges or does it mean we like frontage roads? Should a similar interchange without frontage roads be held in lower regard?
I view the I-35W at I-20 interchange to be more impressive in terms of the number of levels, because all levels are access-controlled. Of course, there are other characteristics that make some other interchanges more impressive overall, such as the High Five which has three top-level ramps and US 75 at PGBT which has two wide bridges carrying main lanes at the top level. To me, that seems like it's worthy of its own discussion: non-depressed interchanges with elevated main lanes at the top.
Interchange with main lanes at top and bottom levels, and ramps in between: Sandwich interchange? The street view from US 75 makes me think of that. http://goo.gl/maps/7mchH
Quote from: wxfree on February 26, 2015, 01:01:50 PM
My reason for excluding frontage roads (maybe not for level count purposes, but for comparative purposes) is that it gives a biased advantage toward places that use frontage roads. Texas will naturally have more five-levels because we have so many frontage roads. Does that mean we like bigger interchanges or does it mean we like frontage roads? Should a similar interchange without frontage roads be held in lower regard?
By similar logic, I-105/I-110 should be discounted because Socal likes direct HOV connections. Most five-levels are special cases that use something extra to get the fifth level (Marquette due to the whole thing being elevated over surface roads, I-85/285 due to the C/D road somewhat inexplicably going over everything).
Quote from: wxfree on February 26, 2015, 01:01:50 PM
I view the I-35W at I-20 interchange to be more impressive in terms of the number of levels, because all levels are access-controlled.
That's a strange one, in that it seems better to put the westbound to southbound ramp on the third level and shift it to the southeast so it doesn't cross the opposing left turn twice. Any idea why they did it this way? It seems to have replaced the original cloverleaf all at once, so it can't be for historical reasons.
Quote from: NE2 on February 26, 2015, 01:35:02 PM
Quote from: wxfree on February 26, 2015, 01:01:50 PM
I view the I-35W at I-20 interchange to be more impressive in terms of the number of levels, because all levels are access-controlled.
That's a strange one, in that it seems better to put the westbound to southbound ramp on the third level and shift it to the southeast so it doesn't cross the opposing left turn twice. Any idea why they did it this way? It seems to have replaced the original cloverleaf all at once, so it can't be for historical reasons.
I have no idea why it was designed that way. The I-35W left turns are both off to the side of the mid-point, but don't cross. The I-20 left turns both go around the mid-point, so they cross with grade separations. The overall shape seems to be intended to use the empty land to the east and avoiding the occupied land to the west. Even with the space constraints, it looks like the I-20 left turns could have been shorter and the level-five put under the two level-fours. The only thing I can think of is that all of the ramps are quite long, and store cars off the main lanes during heavy traffic. I-35W reduces to three lanes south of I-20. Maybe they wanted the ramp to be longer to keep heavy southbound traffic from eventually blocking westbound lanes. Most of the ramp is two-lane to increase its storage capacity, as is the other I-20 left turn which is also lengthened by this arrangement.
As an alternative to excluding frontage and other surface roads, perhaps we could consider the interchanges in this list to be five-level, but have a sub-category for five access-controlled levels. Having three levels of ramps looks to me like enough of a difference that it merits some kind of separate classification.
Could the I 49/I 40 interchange in Alma, AR become a 5 level when I 49 is extended south?
Quote from: robbones on February 26, 2015, 02:45:49 PM
Could the I 49/I 40 interchange in Alma, AR become a 5 level when I 49 is extended south?
Why would it? Going from 4 to 5 requires a significant change from a normal stack.
Quote from: NE2 on February 26, 2015, 12:26:58 PM
By that logic, this is an infinite-level interchange:
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fopengeofiction.net%2Fosm_tiles%2F17%2F76394%2F77060.png&hash=3d664e0c4674186c1dd5255f01ffd887ddec7b02)
So, for the purposes of
this thread do you care that you put the loops in the wrong quadrants? Imma guess no, but I'm amused by your rare technical error so I'm pointing it out in both threads.
Quote from: NE2 on February 26, 2015, 01:35:02 PM
That's a strange one, in that it seems better to put the westbound to southbound ramp on the third level and shift it to the southeast so it doesn't cross the opposing left turn twice. Any idea why they did it this way? It seems to have replaced the original cloverleaf all at once, so it can't be for historical reasons.
By the way, I-64/I-270 (http://maps.google.com/maps?ll=38.638378,-90.448251&spn=0.01195,0.024784&t=k&z=16) is a topologically similar 3-level (the left turns from I-64 have a somewhat steep downhill to get down to level 2 before passing under I-64).
Quote from: vtk on February 26, 2015, 02:50:08 PM
So, for the purposes of this thread do you care that you put the loops in the wrong quadrants? Imma guess no, but I'm amused by your rare technical error so I'm pointing it out in both threads.
Actually I put the left-side left turns in the wrong quadrants. And now the evidence is hidden in the history. So suck it.
Quote from: NE2 on February 26, 2015, 12:26:58 PM
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fopengeofiction.net%2Fosm_tiles%2F17%2F76394%2F77060.png&hash=3d664e0c4674186c1dd5255f01ffd887ddec7b02)
For what it's worth, that looks just like the I-95/MD-32 interchange (https://www.google.com/maps/place/39%C2%B009'29.7%22N+76%C2%B049'38.1%22W/@39.158262,-76.827256,17z/data=!3m1!4b1!4m2!3m1!1s0x0:0x0). Assume I-95 NB heads toward the right. One main difference is that MD-32 goes over SB I-95 but under NB, rather than the interwoven pattern.
I can't determine whether the big interchange near Weston, Florida, of I-75, I-595, and FL-869 would qualify. There appear to be five levels looking at it, but its shape is somewhat different from what you usually think of as a stack.
Going from lowest to highest with a couple of ramps omitted from the list:
(1) I-75 thru movement
(2) I-75 to I-595 (plus frontage roads) and vice versa
(3) I-75 to FL-869 and vice versa
(4) Westbound I-595 to southbound I-75; southbound I-75 to northbound FL-869
(5) Southbound FL-869 to eastbound I-595
https://www.google.com/maps/@26.1190859,-80.349986,1924m/data=!3m1!1e3
Quote from: 1995hoo on February 26, 2015, 03:57:27 PM
I can't determine whether the big interchange near Weston, Florida, of I-75, I-595, and FL-869 would qualify. There appear to be five levels looking at it, but its shape is somewhat different from what you usually think of as a stack.
Your level 2 returns to ground level before it passes under 869, so it's only 4 levels.
Quote from: NE2 on February 26, 2015, 04:05:04 PM
Quote from: 1995hoo on February 26, 2015, 03:57:27 PM
I can't determine whether the big interchange near Weston, Florida, of I-75, I-595, and FL-869 would qualify. There appear to be five levels looking at it, but its shape is somewhat different from what you usually think of as a stack.
Your level 2 returns to ground level before it passes under 869, so it's only 4 levels.
Fair enough, thanks.
I was trying to figure out the Springfield Interchange, but it looks like a maximum of four levels at any given point.
https://www.google.com/maps/@38.7900484,-77.174715,865m/data=!3m1!1e3
Quote from: 1995hoo on February 26, 2015, 03:57:27 PM
I can't determine whether the big interchange near Weston, Florida, of I-75, I-595, and FL-869 would qualify. There appear to be five levels looking at it, but its shape is somewhat different from what you usually think of as a stack.
Going from lowest to highest with a couple of ramps omitted from the list:
(1) I-75 thru movement
(2) I-75 to I-595 (plus frontage roads) and vice versa
(3) I-75 to FL-869 and vice versa
(4) Westbound I-595 to southbound I-75; southbound I-75 to northbound FL-869
(5) Southbound FL-869 to eastbound I-595
https://www.google.com/maps/@26.1190859,-80.349986,1924m/data=!3m1!1e3
I'd call that a 5-level. Here's my interpretation, using one example to establish each level.
1. I-75
2. I-75 to I-595
3. nouth-south main lanes
4. I-75 to FL 869
5. FL 869 to I-595
3, 4, and 5 are nearly vertical, and 2 goes below 3 and above 1.
Don't forget that 1 goes over Weston Road. And Weston Road goes over the New River. 7 levels!
Quote from: wxfree on February 26, 2015, 01:01:50 PM
My reason for excluding frontage roads (maybe not for level count purposes, but for comparative purposes) is that it gives a biased advantage toward places that use frontage roads. Texas will naturally have more five-levels because we have so many frontage roads. Does that mean we like bigger interchanges or does it mean we like frontage roads? Should a similar interchange without frontage roads be held in lower regard?
Yes on all counts. Texas undeniably loves big interchanges, and it also undeniably loves frontage roads. And I do hold big interchanges with no frontage roads in lower esteem. The impressiveness of a five-level stack is not diminished by the apparent reason it had to be five levels instead of four. And a three- or four-level interchange is not somehow redeemed by that location's lack of tricky bits.
Quote from: wxfree on February 26, 2015, 01:01:50 PM
I view the I-35W at I-20 interchange to be more impressive in terms of the number of levels, because all levels are access-controlled.
That's a strange one, in that it seems better to put the westbound to southbound ramp on the third level and shift it to the southeast so it doesn't cross the opposing left turn twice. Any idea why they did it this way? It seems to have replaced the original cloverleaf all at once, so it can't be for historical reasons.
[/quote]
Space/grade constraints crossing under roads/rails within a half mile on the west, south, and east sides of the interchange maybe? Moving the WB to SB ramp southeast would require 2 sharper curves to fit it into the gap. Moving to EB to NB ramp northwest would require the NB to WB ramp to have a steeper descent, and the SB to EB ramp to have a steeper ascent.
Detroit: I-96 (Jeffries Fwy) and M-39 (Southfield Fwy). Surface roads and a railroad seem to give it 5 at some points.
Dayton: I-75 and US-35 might be a 4.5 at best. Two railroads skirt the interchange to the north and west, but just miss it. A rail spur used to run under it just to the south as well, but that was abandoned and the underpass filled in with the recent construction (along with a nearby exit and entrance ramp).
Quote from: lepidopteran on February 27, 2015, 01:36:57 PM
Detroit: I-96 (Jeffries Fwy) and M-39 (Southfield Fwy). Surface roads and a railroad seem to give it 5 at some points.
I'm not seeing it. The railroad and surface roads all appear to be at the same level as I-96.
Quote from: lepidopteran on February 27, 2015, 01:36:57 PM
Dayton: I-75 and US-35 might be a 4.5 at best. Two railroads skirt the interchange to the north and west, but just miss it. A rail spur used to run under it just to the south as well, but that was abandoned and the underpass filled in with the recent construction (along with a nearby exit and entrance ramp).
Again, the railroads crossing US 35 are at the level of I-75, and then go down to ground (US 35) level to go under I-75.
Yeah, I already checked the Dayton one, and I agree it's no more than four.
I-90's double decks at I-5 is making it difficult for me to parse. 4 or 5?
Quote from: Bickendan on April 08, 2015, 04:14:44 PM
I-90's double decks at I-5 is making it difficult for me to parse. 4 or 5?
3.
Quote from: NE2 on April 08, 2015, 04:17:34 PM
Quote from: Bickendan on April 08, 2015, 04:14:44 PM
I-90's double decks at I-5 is making it difficult for me to parse. 4 or 5?
3.
You're not counting the ramps to the street network then?
Quote from: Bickendan on April 08, 2015, 04:32:31 PM
Quote from: NE2 on April 08, 2015, 04:17:34 PM
Quote from: Bickendan on April 08, 2015, 04:14:44 PM
I-90's double decks at I-5 is making it difficult for me to parse. 4 or 5?
3.
You're not counting the ramps to the street network then?
The Airport Way exit begins at ground level. It rises to level 1 as it passes over northbound Airport Way and under the I-5 north to I-90 west ramp (which is at level 2 here but lowers to level 1 before merging into I-90) and the I-90 east to I-5 south ramp.
The Dearborn Street exit is all at ground level. The entrance begins at ground level and rises to level 1 to cross over several northbound ramps.
I don't see any other local access.
The 12th Avenue bridge over I-90 may be 4 levels due to I-90 being built into the side of the hill that 12th Avenue flies off of. But nothing crosses over I-90 at I-5, and the bus lanes rise to level 2.
Junction 6 of the M6 Motorway just outside Birmingham. Five levels. Probably the tallest junction in the UK:
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FRei0UVx.png&hash=7e899542776c5857331929ae8667d8ac666c5530)
Don't bother looking in Illinois. There's nothing over 3 levels here.
Quote from: jakeroot on April 08, 2015, 05:29:29 PM
Junction 6 of the M6 Motorway just outside Birmingham. Five levels. Probably the tallest junction in the UK:
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FRei0UVx.png&hash=7e899542776c5857331929ae8667d8ac666c5530)
I see only three levels (four if you count the canal).
Quote from: NE2 on April 08, 2015, 05:45:16 PM
Quote from: jakeroot on April 08, 2015, 05:29:29 PM
Junction 6 of the M6 Motorway just outside Birmingham. Five levels. Probably the tallest junction in the UK:
I see only three levels (four if you count the canal).
Presuming you count the ground level street and roundabout (as you must), there's at least four.
Quote from: Brandon on April 08, 2015, 05:35:35 PM
Don't bother looking in Illinois. There's nothing over 3 levels here.
Not stacks but two interchanges in East St. Louis get up to four levels
* I-55/I-64 at the MLK Bridge Aerial photo) (https://maps.google.com/maps?ll=38.629259,-90.158803&spn=0.003579,0.008256&t=h&z=18)
1) SB I-55
2) Local Street
3) NB I-55 and ramps to/from the MLK Bridge.
4) Ramp from the MLK Bridge to the right side of NB I-55
* I-55/I-64/I-70 (Aerial photo (https://maps.google.com/maps?ll=38.633006,-90.14595&spn=0.003579,0.008256&t=h&z=18)
1) EB I-64/NB I-55
2) IL 3/St. Clair Avenue
3) SB I-55
4) I-70 Connectors
Additionally, it appears the Circle Interchange will make it to four levels when the new NB to WB ramp is completed.
Quote from: jakeroot on April 08, 2015, 05:50:37 PM
Presuming you count the ground level street and roundabout (as you must), there's at least four.
How? There are three at the roundabout, but both bridge levels there come down to ground level (except for the canal) before passing under the M6.
Quote from: Revive 755 on April 08, 2015, 05:59:02 PM
* I-55/I-64 at the MLK Bridge Aerial photo) (https://maps.google.com/maps?ll=38.629259,-90.158803&spn=0.003579,0.008256&t=h&z=18)
1) SB I-55
2) Local Street
3) NB I-55 and ramps to/from the MLK Bridge.
4) Ramp from the MLK Bridge to the right side of NB I-55
Too much horizontal separation between the two three-level crossings of 1-2-3A/4 and 2-3B-4 for it to count IMO. (I'm calling the MLK ramps 3A and I-55 northbound 3B.)
Quote from: Revive 755 on April 08, 2015, 05:59:02 PM
* I-55/I-64/I-70 (Aerial photo (https://maps.google.com/maps?ll=38.633006,-90.14595&spn=0.003579,0.008256&t=h&z=18)
1) EB I-64/NB I-55
2) IL 3/St. Clair Avenue
3) SB I-55
4) I-70 Connectors
This one definitely counts now that level 4 exists, but your other descriptions are a bit off:
1 I-55 north
2 ramp from I-55 south to I-64 east
3 I-64 west
4 I-70 east
Quote from: NE2 on April 08, 2015, 06:00:52 PM
Quote from: jakeroot on April 08, 2015, 05:50:37 PM
Presuming you count the ground level street and roundabout (as you must), there's at least four.
How? There are three at the roundabout, but both bridge levels there come down to ground level (except for the canal) before passing under the M6.
Hmm. Yeah, three levels. I wonder why so many websites list it as 5 levels.
Maybe they mean 5 storeys (~50 feet).
Quote from: Brandon on April 08, 2015, 05:35:35 PM
Don't bother looking in Illinois. There's nothing over 3 levels here.
Same for Wisconsin outside Milwaukee, Minnesota and Iowa.
Quote from: NE2 on April 08, 2015, 09:47:11 PM
Maybe they mean 5 storeys (~50 feet).
I think that's a sound assumption.
You'd be hard-pressed to find anything over 4 in the northeast. New York only has 3 stacks (all pure 4-levels) and while other interchanges get up to 4, you won't get over unless there's something major I'm missing.
The 5+'s seem to be limited to Texas, California and Arizona.