This is specifically for interchanges between two undivided two lane roads.
I know of two in Wisconsin: WI-16 and WI-22 near Wyocena and WI-13 and US-8 near Prentice.
PA 41 and Limestone Rd. (to DE 7) (https://www.google.com/maps/@39.7980786,-75.7256501,276m/data=!3m1!1e3)
US 20 & MA 67 (https://www.google.com/maps/place/Brimfield,+MA/@42.1437035,-72.2856106,366m/data=!3m1!1e3!4m5!3m4!1s0x89e6bc4bc056ce49:0x9ff50745f6ecc776!8m2!3d42.1225482!4d-72.2005059)
No need for another thread about this. Just post examples over here (https://www.aaroads.com/forum/index.php?topic=5411.msg118363#msg118363).
Quote from: kphoger on August 28, 2019, 01:57:58 PM
No need for another thread about this. Just post examples over here (https://www.aaroads.com/forum/index.php?topic=5411.msg118363#msg118363).
I explicitly stated in the original post that this was for two lane examples only. If the threads should be merged, that's the mods responsibility, not yours.
Quote from: thspfc on August 28, 2019, 02:01:03 PM
Quote from: kphoger on August 28, 2019, 01:57:58 PM
No need for another thread about this. Just post examples over here (https://www.aaroads.com/forum/index.php?topic=5411.msg118363#msg118363).
I explicitly stated in the original post that this was for two lane examples only. If the threads should be merged, that's the mods responsibility, not yours.
Hmmm. This got me thinking. There are a crazy lot of US-State Route shield mix-ups, so we now have a thread devoted to them specifically,
and a thread for general mix-ups. I'm not sure we can apply that logic here, since the original thread wasn't out of control/annoyingly bogged down with examples specific to 2-lane roads. And because it's mostly links instead of photos, nobody really notices how many examples there are of each type of roadway.
There are a fair number of interchanges between two-lane roads in Nova Scotia, including on some of the 100-series highways (101 north of Yarmouth has several).
Any super-2 and it's junctioning roadway (presuming itself two lanes) would count for this right? That gives over a dozen in New England between MA 2, NH 101, NH 16 (down to one now), US 202/NH 9, and maybe some others I am missing.
NY 104/NY 89 is an interesting example as neither road is a freeway, and the overpass actually has room for another carriageway!
https://www.google.com/maps/@43.2101036,-76.8035882,992m/data=!3m1!1e3
US 1 at Howlett St. in Topsfield MA: is this one even needed?
https://goo.gl/maps/X4FRDpoPufCtxqNs9
Quote from: 1 on August 28, 2019, 09:14:22 PM
US 1 at Howlett St. in Topsfield MA: is this one even needed?
https://goo.gl/maps/X4FRDpoPufCtxqNs9
I don't know, but if it takes THREE "no left turn" signs to stop people from doing it, perhaps the choice of intersection design should be questioned.
SR 42 and the Powers Highway in Coos County OR, just east of Myrtle Point.
US 101 and SR 18 in Lincoln County, just north of Lincoln City OR.
US 101 and the road which leads to the Rogue Hills development just north of Gold Beach OR.
ODOT had a "thing" going for a while it appears!
Rick
Quote from: vdeane on August 28, 2019, 09:06:30 PM
NY 104/NY 89 is an interesting example as neither road is a freeway, and the overpass actually has room for another carriageway!
https://www.google.com/maps/@43.2101036,-76.8035882,992m/data=!3m1!1e3
Yeah, I've always been curious about that random half-diamond. Yet another point in favor of twinning NY 104 from Williamson to NY 370!
Quote from: webny99 on August 29, 2019, 09:16:52 AM
Quote from: vdeane on August 28, 2019, 09:06:30 PM
NY 104/NY 89 is an interesting example as neither road is a freeway, and the overpass actually has room for another carriageway!
https://www.google.com/maps/@43.2101036,-76.8035882,992m/data=!3m1!1e3
Yeah, I've always been curious about that random half-diamond. Yet another point in favor of twinning NY 104 from Williamson to NY 370!
I don't remember if I read this somewhere or just assumed it...but several significant parts of NY 104 in Eastern Wayne County, including that "interchange" are graded like a Super-2 and I assumed it was advanced prep for an actual twinning that was long abandoned.
Kentucky has a few on the Mountain Parkway (KY 191, KY 1010, KY 205 and KY 134/191) but the latter two are going away as the Mountain Parkway is being four-laned at those exits.
On the Hal Rogers, the KY 451 exit is the only true interchange that qualifies. I think KY 80 may have four lanes at the spot where it crosses the Hal Rogers at Manchester, and the KY 66 and KY 118 exits are at-grades where toll booths were formerly located.
NY 9G and 308 in Rhinebeck https://www.google.com/maps/@41.9372193,-73.8844252,17.22z
NC 98 and NC 50, west of Wake Forest: https://binged.it/2L53BeT
Quote from: nexus73 on August 29, 2019, 08:17:39 AM
SR 42 and the Powers Highway in Coos County OR, just east of Myrtle Point.
US 101 and SR 18 in Lincoln County, just north of Lincoln City OR.
US 101 and the road which leads to the Rogue Hills development just north of Gold Beach OR.
ODOT had a "thing" going for a while it appears!
Rick
Also US 101 and US 26 in Seaside. And multiple interchanges (3 of them, but 2 of them have involve a RIRO, and one of those allows left turns) on the Cannon Beach bypass just to the south.
I count 4 such interchanges on the VA-262 Staunton Loop.
While the crossing road briefly widens to 4 lanes in the interchange area, the crossing road routes are 2-lane roads.
https://www.google.com/maps/place/Staunton,+VA+24401/@38.16214,-79.1111713,715m/data=!3m1!1e3!4m5!3m4!1s0x89b4a08eb8621697:0xe5d6e4710a09b66e!8m2!3d38.149576!4d-79.0716958
The Natchez Trace Parkway has several
Quote from: Super Mateo on August 29, 2019, 07:51:50 AM
Quote from: 1 on August 28, 2019, 09:14:22 PM
US 1 at Howlett St. in Topsfield MA: is this one even needed?
https://goo.gl/maps/X4FRDpoPufCtxqNs9
I don't know, but if it takes THREE "no left turn" signs to stop people from doing it, perhaps the choice of intersection design should be questioned.
Two possible reasons why that interchange exists:
1. Such obviously long predated the existence of I-95; US 1 was the main thoroughfare at that time & carried more traffic.
2. When the Topsfield Fair (which dates back to 1818) is open every October, US 1 in this area becomes a parking lot during the week-and-a half duration of the event. A grade-separated crossing at the very least allows the local traffic to continue moving along.
McGuffey Road (formerly US-62 in this stretch) and Andrews Avenue in an old industrial area of Youngstown, Ohio:
https://goo.gl/maps/ktvCLCrX1cZBA8Fw9
Quote from: doorknob60 on August 29, 2019, 06:18:34 PM
Quote from: nexus73 on August 29, 2019, 08:17:39 AM
SR 42 and the Powers Highway in Coos County OR, just east of Myrtle Point.
US 101 and SR 18 in Lincoln County, just north of Lincoln City OR.
US 101 and the road which leads to the Rogue Hills development just north of Gold Beach OR.
ODOT had a "thing" going for a while it appears!
Rick
Also US 101 and US 26 in Seaside. And multiple interchanges (3 of them, but 2 of them have involve a RIRO, and one of those allows left turns) on the Cannon Beach bypass just to the south.
And US 97 at OR 206
US 395 (on the super-two between Ridgecrest and Inyokern) and CA 178.
http://www.floodgap.com/roadgap/395/u2/#img_89
US 93 @ AZ71 Northwest of Wickenberg, AZ
US 220 and Fairground/Auction Rd, just north of I-80 in Clinton County, PA. One day, US 220 is supposed to be twinned and become part of I-99, but for now, it's a 2-lane roadway interchanging another.
Three exist on the AR-549 in Belle Vista, AR - https://www.google.com/maps/@36.4420245,-94.352826,7194m/data=!3m1!1e3
One exists on I-93 through Franconia Notch, VT - https://www.google.com/maps/@44.1704517,-71.6834394,802m/data=!3m1!1e3
One exists on US-11 in Lexington, VA - https://www.google.com/maps/@37.7899331,-79.4294657,442m/data=!3m1!1e3
Four exist on the Colonial Pkwy in Williamsburg, VA - https://www.google.com/maps/@37.2736756,-76.6898176,7116m/data=!3m1!1e3
One exists on NC-49 near Denton, NC - https://www.google.com/maps/@35.5586377,-80.09751,3638m/data=!3m1!1e3!5m1!1e1
Quote from: sprjus4 on September 01, 2019, 07:54:30 AM
Three exist on the AR-549 in Belle Vista, AR - https://www.google.com/maps/@36.4420245,-94.352826,7194m/data=!3m1!1e3
One exists on I-93 through Franconia Notch, VT - https://www.google.com/maps/@44.1704517,-71.6834394,802m/data=!3m1!1e3
One exists on US-11 in Lexington, VA - https://www.google.com/maps/@37.7899331,-79.4294657,442m/data=!3m1!1e3
Four exist on the Colonial Pkwy in Williamsburg, VA - https://www.google.com/maps/@37.2736756,-76.6898176,7116m/data=!3m1!1e3
One exists on NC-49 near Denton, NC - https://www.google.com/maps/@35.5586377,-80.09751,3638m/data=!3m1!1e3!5m1!1e1
The one at AR-549 exists because it will one day be I-49 (if MO would build their portion...)
SM-G965U
OR-43 and the Sellwood Bridge - https://goo.gl/maps/s9GbFA8ygrt5G9yG8 (This new interchange is so much boring from the original)
US-101 and SR 104 near Discovery Bay, WA - https://goo.gl/maps/CLu6aQUYhztjVqNq7
Quote from: Bickendan on August 31, 2019, 01:48:41 AM
Quote from: doorknob60 on August 29, 2019, 06:18:34 PM
Quote from: nexus73 on August 29, 2019, 08:17:39 AM
SR 42 and the Powers Highway in Coos County OR, just east of Myrtle Point.
US 101 and SR 18 in Lincoln County, just north of Lincoln City OR.
US 101 and the road which leads to the Rogue Hills development just north of Gold Beach OR.
ODOT had a "thing" going for a while it appears!
Rick
Also US 101 and US 26 in Seaside. And multiple interchanges (3 of them, but 2 of them have involve a RIRO, and one of those allows left turns) on the Cannon Beach bypass just to the south.
And US 97 at OR 206
More in Oregon: US 30 exit 73, between Astoria and Clatskanie
NE Marine Dr at 223rd Ave (allegedly - I should scout this one)
Wyola, PA
Wyola is an unincorporated community in Delaware County
Interchange between PA-252 and St. Davids Road
https://www.google.com/maps/place/Wyola,+PA+19073/@40.0079911,-75.4193771,1402m/data=!3m1!1e3!4m5!3m4!1s0x89c6eb6938b832ff:0x5dff34f663b8bad7!8m2!3d40.0081654!4d-75.418529
I see that they now have a roundabout just east of the interchange.
Since it hasn't been mentioned yet, I'll include MN 55/MN 28 near Glenwood.
Quote from: Beltway on September 02, 2019, 11:41:20 PM
Wyola, PA
Wyola is an unincorporated community in Delaware County
Interchange between PA-252 and St. Davids Road
https://www.google.com/maps/place/Wyola,+PA+19073/@40.0079911,-75.4193771,1402m/data=!3m1!1e3!4m5!3m4!1s0x89c6eb6938b832ff:0x5dff34f663b8bad7!8m2!3d40.0081654!4d-75.418529
Personally, I wouldn't necessarily consider such to be included for two reasons:
1. PA 252 is a divided roadway.
2. PA 252 in this area wasn't originally a 2-laner (https://www.google.com/maps/@40.0074065,-75.4182083,3a,75y,134.82h,63.66t/data=!3m6!1e1!3m4!1sPLIeKk6INQEuXJ2kkb8HUQ!2e0!7i3328!8i1664). Even today, the lower portion of the northbound stretch is still striped as 2-lanes; for a total of 3 lanes overall.
Quote from: Beltway on September 02, 2019, 11:41:20 PM
I see that they now have a roundabout just east of the interchange.
Oldest GSV from that area is 2012 & shows the roundabout. My guess is that such was added sometime during the prior decade.
Will we ever get a stack interchange between two super-2s? That would be cool.
Quote from: PHLBOS on September 03, 2019, 01:35:53 PM
Quote from: Beltway on September 02, 2019, 11:41:20 PM
Wyola, PA
Wyola is an unincorporated community in Delaware County
Interchange between PA-252 and St. Davids Road
https://www.google.com/maps/place/Wyola,+PA+19073/@40.0079911,-75.4193771,1402m/data=!3m1!1e3!4m5!3m4!1s0x89c6eb6938b832ff:0x5dff34f663b8bad7!8m2!3d40.0081654!4d-75.418529
Personally, I wouldn't necessarily consider such to be included for two reasons:
1. PA 252 is a divided roadway.
2. PA 252 in this area wasn't originally a 2-laner (https://www.google.com/maps/@40.0074065,-75.4182083,3a,75y,134.82h,63.66t/data=!3m6!1e1!3m4!1sPLIeKk6INQEuXJ2kkb8HUQ!2e0!7i3328!8i1664). Even today, the lower portion of the northbound stretch is still striped as 2-lanes; for a total of 3 lanes overall.
Quote from: Beltway on September 02, 2019, 11:41:20 PM
I see that they now have a roundabout just east of the interchange.
Oldest GSV from that area is 2012 & shows the roundabout. My guess is that such was added sometime during the prior decade.
Historic Aerials/NETR Onlines of that intersection/interchange show that it's been 4 lanes (for through traffic) since 1967.
Quote from: TEG24601 on September 02, 2019, 05:59:46 PM
US-101 and SR 104 near Discovery Bay, WA - https://goo.gl/maps/CLu6aQUYhztjVqNq7
Several others in WA:
* the SPUI at SR-522 and Fales Road near Monroe: https://goo.gl/maps/7diRdWyyEixYDUjK7
* US-2 and 88 St SE near Snohomish: https://goo.gl/maps/Gr8oS249jj8m8nxq8
* US-2 and SR-9 near Snohomish: https://goo.gl/maps/4SYAZmwMacDgTsRC7 (may not count as Hwy 2 transitions to 4-lane divided beneath the overpass)
* US-2 and US-97 northwest of Wenatchee: https://goo.gl/maps/JWYZcCUmcyvCYRHQ6
There are several along US 400 in Kansas. Some include: US-400xUS-59 in Parsons, US-400xUS-169, and US-400xUS-75.
There is another one at US-65xMO-83 in Warsaw, MO (but 65 turns in to a divided highway once it crosses the Osage River). I would like to see that highway upgraded to four lanes between Warsaw & Buffalo, then it will be four lanes from Harrison AR to Marshall, MO/I-70.
Quote from: ozarkman417 on September 03, 2019, 07:49:12 PM
There are several along US 400 in Kansas. Some include: US-400xUS-59 in Parsons, US-400xUS-169, and US-400xUS-75.
There is another one at US-65xMO-83 in Warsaw, MO (but 65 turns in to a divided highway once it crosses the Osage River). I would like to see that highway upgraded to four lanes between Warsaw & Buffalo, then it will be four lanes from Harrison AR to Marshall, MO/I-70.
The US 54 & 400 split in Mullinville is one you did not mention.
Quote from: Plutonic Panda on September 03, 2019, 06:14:00 PM
Will we ever get a stack interchange between two super-2s? That would be cool.
Highly unlikely. Any volume of traffic that would warrant a stack with all 4 quadrant flyovers would also likely require at least 4 lanes on each mainline.
Quote from: froggie on September 04, 2019, 07:35:11 AM
Quote from: Plutonic Panda on September 03, 2019, 06:14:00 PM
Will we ever get a stack interchange between two super-2s? That would be cool.
Highly unlikely. Any volume of traffic that would warrant a stack with all 4 quadrant flyovers would also likely require at least 4 lanes on each mainline.
The closest thing I can think of to such a setup, would be US-2 and WA-204 east of Everett. It's not a full stack, but it has characteristics of a stack. It does not qualify for this thread however, as two of the approaches are divided carriageway.
Google Maps: https://maps.app.goo.gl/6ZZQ39hSsYdz4Df87
Quote from: froggie on September 04, 2019, 07:35:11 AM
Quote from: Plutonic Panda on September 03, 2019, 06:14:00 PM
Will we ever get a stack interchange between two super-2s? That would be cool.
Highly unlikely. Any volume of traffic that would warrant a stack with all 4 quadrant flyovers would also likely require at least 4 lanes on each mainline.
Or perhaps geographical constraints could warrant a stack having it being cheaper than a cloverleaf bearing expensive demolition of any nearby elevated land. This seems like a more likely scenario to occur in the NE and would obviously need to be two super-2s that cross over each other yet current don't connect or a future super two built over an existing one.
Quote from: PHLBOS on September 03, 2019, 01:35:53 PM
Quote from: Beltway on September 02, 2019, 11:41:20 PM
Wyola, PA Wyola is an unincorporated community in Delaware County Interchange between PA-252 and St. Davids Road
Personally, I wouldn't necessarily consider such to be included for two reasons:
1. PA 252 is a divided roadway.
2. PA 252 in this area wasn't originally a 2-laner (https://www.google.com/maps/@40.0074065,-75.4182083,3a,75y,134.82h,63.66t/data=!3m6!1e1!3m4!1sPLIeKk6INQEuXJ2kkb8HUQ!2e0!7i3328!8i1664). Even today, the lower portion of the northbound stretch is still striped as 2-lanes; for a total of 3 lanes overall.
Good points, but I wondered back in the 1970s when I lived in the area why they built an interchange there?
Traffic wasn't all that heavy there back then. Arterial interchanges were very rare in PA back then, it wasn't a strategic intersection, and north of there it was just a 2-lane highway.
I
Quote from: Beltway on September 04, 2019, 04:05:53 PM
Quote from: PHLBOS on September 03, 2019, 01:35:53 PM
Quote from: Beltway on September 02, 2019, 11:41:20 PM
Wyola, PA Wyola is an unincorporated community in Delaware County Interchange between PA-252 and St. Davids Road
Personally, I wouldn't necessarily consider such to be included for two reasons:
1. PA 252 is a divided roadway.
2. PA 252 in this area wasn't originally a 2-laner (https://www.google.com/maps/@40.0074065,-75.4182083,3a,75y,134.82h,63.66t/data=!3m6!1e1!3m4!1sPLIeKk6INQEuXJ2kkb8HUQ!2e0!7i3328!8i1664). Even today, the lower portion of the northbound stretch is still striped as 2-lanes; for a total of 3 lanes overall.
Good points, but I wondered back in the 1970s when I lived in the area why they built an interchange there?
Traffic wasn't all that heavy there back then. Arterial interchanges were very rare in PA back then, it wasn't a strategic intersection, and north of there it was just a 2-lane highway.
The same goes for US 6 and NY 293 east of Harriman. Why they need an interchange there when few vehicles go between US 6 and NY 293 to warrant a trumpet that is laid out all wrong. US 6 should be the main body of it, but EB US 6 to EB NY 293 and WB NY 203 to WB US 6 is the main stem while US 6 exits itself going EB with the majority of the traffic and going WB US 6 merges into the road that NY 293 ends at with more cars merging.
Bad planning in some cases.
Quote from: roadman65 on September 04, 2019, 04:10:28 PM
The same goes for US 6 and NY 293 east of Harriman. Why they need an interchange there when few vehicles go between US 6 and NY 293 to warrant a trumpet that is laid out all wrong. US 6 should be the main body of it, but EB US 6 to EB NY 293 and WB NY 203 to WB US 6 is the main stem while US 6 exits itself going EB with the majority of the traffic and going WB US 6 merges into the road that NY 293 ends at with more cars merging. Bad planning in some cases.
The Wyola interchange meets (and did so back then) traffic warrants for benefitting from a grade separation there, it was not a waste. Just that for PA it was an extravagance.
Quote from: Hot Rod Hootenanny on September 03, 2019, 06:45:36 PM
Historic Aerials/NETR Onlines of that intersection/interchange show that it's been 4 lanes (for through traffic) since 1967.
Not quite. The land was being cleared for such back then. The 1971 Aerial shows the fully-completed interchange.
Quote from: Beltway on September 04, 2019, 04:05:53 PM
Quote from: PHLBOS on September 03, 2019, 01:35:53 PM
Quote from: Beltway on September 02, 2019, 11:41:20 PM
Wyola, PA Wyola is an unincorporated community in Delaware County Interchange between PA-252 and St. Davids Road
Personally, I wouldn't necessarily consider such to be included for two reasons:
1. PA 252 is a divided roadway.
2. PA 252 in this area wasn't originally a 2-laner (https://www.google.com/maps/@40.0074065,-75.4182083,3a,75y,134.82h,63.66t/data=!3m6!1e1!3m4!1sPLIeKk6INQEuXJ2kkb8HUQ!2e0!7i3328!8i1664). Even today, the lower portion of the northbound stretch is still striped as 2-lanes; for a total of 3 lanes overall.
Good points, but I wondered back in the 1970s when I lived in the area why they built an interchange there?
Traffic wasn't all that heavy there back then. Arterial interchanges were very rare in PA back then, it wasn't a strategic intersection, and north of there it was just a 2-lane highway.
Based on Historic Aerials, the interchange has existed since 1971.
As for why was such constructed that way early on... such may have been part of an initial plan to upgrade PA 252 into a 4-lane divided highway that never fully materialized. Keep in mind, due to the absence of I-476 at the time; roads like PA 252 & 320 likely saw more through-traffic usage.
Side bar: how long has Episcopal Academy been there (west of the interchange)?
Quote from: jakeroot on September 04, 2019, 01:10:58 PM
Quote from: froggie on September 04, 2019, 07:35:11 AM
Quote from: Plutonic Panda on September 03, 2019, 06:14:00 PM
Will we ever get a stack interchange between two super-2s? That would be cool.
Highly unlikely. Any volume of traffic that would warrant a stack with all 4 quadrant flyovers would also likely require at least 4 lanes on each mainline.
The closest thing I can think of to such a setup, would be US-2 and WA-204 east of Everett. It's not a full stack, but it has characteristics of a stack. It does not qualify for this thread however, as two of the approaches are divided carriageway.
Google Maps: https://maps.app.goo.gl/6ZZQ39hSsYdz4Df87
Interesting. Are there plans to expand the super two setup further east on US-2?
Quote from: PHLBOS on September 04, 2019, 04:21:09 PM
Quote from: Hot Rod Hootenanny on September 03, 2019, 06:45:36 PM
Historic Aerials/NETR Onlines of that intersection/interchange show that it's been 4 lanes (for through traffic) since 1967.
Not quite. The land was being cleared for such back then. The 1971 Aerial shows the fully-completed interchange.
Quote from: Beltway on September 04, 2019, 04:05:53 PM
Quote from: PHLBOS on September 03, 2019, 01:35:53 PM
Quote from: Beltway on September 02, 2019, 11:41:20 PM
Wyola, PA Wyola is an unincorporated community in Delaware County Interchange between PA-252 and St. Davids Road
Personally, I wouldn't necessarily consider such to be included for two reasons:
1. PA 252 is a divided roadway.
2. PA 252 in this area wasn't originally a 2-laner (https://www.google.com/maps/@40.0074065,-75.4182083,3a,75y,134.82h,63.66t/data=!3m6!1e1!3m4!1sPLIeKk6INQEuXJ2kkb8HUQ!2e0!7i3328!8i1664). Even today, the lower portion of the northbound stretch is still striped as 2-lanes; for a total of 3 lanes overall.
Good points, but I wondered back in the 1970s when I lived in the area why they built an interchange there?
Traffic wasn't all that heavy there back then. Arterial interchanges were very rare in PA back then, it wasn't a strategic intersection, and north of there it was just a 2-lane highway.
Based on Historic Aerials, the interchange has existed since 1971.
As for why was such constructed that way early on... such may have been part of an initial plan to upgrade PA 252 into a 4-lane divided highway that never fully materialized. Keep in mind, due to the absence of I-476 at the time; roads like PA 252 & 320 likely saw more through-traffic usage.
Side bar: how long has Episcopal Academy been there (west of the interchange)?
PA 252 south starting at that interchange is a 4 lane arterial...and has been as long as I can remember (late 80s?)
Quote from: PHLBOS on September 04, 2019, 04:21:09 PM
Based on Historic Aerials, the [Wyola] interchange has existed since 1971.
As for why was such constructed that way early on... such may have been part of an initial plan to upgrade PA 252 into a 4-lane divided highway that never fully materialized. Keep in mind, due to the absence of I-476 at the time; roads like PA 252 & 320 likely saw more through-traffic usage.
Side bar: how long has Episcopal Academy been there (west of the interchange)?
I first drove it in fall of 1972, and I don't recall any school there then. I did think about the absence of I-476 then, but it was in planning since 1956, and based on how PA-252 curves to the northwest, I am unsure as to how much traffic relief that I-476 would provide to PA-252.
PennDOT did spend a fortune to build the interchange at PA-320 and US-1 in the late 1970s, and while that was a very congested intersection, that was directly relievable by the planned I-476.
Quote from: Plutonic Panda on September 04, 2019, 02:52:26 PM
Quote from: froggie on September 04, 2019, 07:35:11 AM
Quote from: Plutonic Panda on September 03, 2019, 06:14:00 PM
Will we ever get a stack interchange between two super-2s? That would be cool.
Highly unlikely. Any volume of traffic that would warrant a stack with all 4 quadrant flyovers would also likely require at least 4 lanes on each mainline.
Or perhaps geographical constraints could warrant a stack having it being cheaper than a cloverleaf bearing expensive demolition of any nearby elevated land. This seems like a more likely scenario to occur in the NE and would obviously need to be two super-2s that cross over each other yet current don't connect or a future super two built over an existing one.
Again, doubtful. If traffic volumes were low enough that they wouldn't need 4 lanes and there were geographical constraints, a tight diamond would more than suffice. Even a double-trumpet if the goal was fully-controlled access for both roadways...but again volumes warranting that would most likely warrant 4 lanes to begin with.
I also can't think of anywhere offhand in New England where such would be warranted.
Quote from: roadman65 on September 04, 2019, 04:10:28 PM
The same goes for US 6 and NY 293 east of Harriman. Why they need an interchange there when few vehicles go between US 6 and NY 293 to warrant a trumpet that is laid out all wrong. US 6 should be the main body of it, but EB US 6 to EB NY 293 and WB NY 203 to WB US 6 is the main stem while US 6 exits itself going EB with the majority of the traffic and going WB US 6 merges into the road that NY 293 ends at with more cars merging.
Bear in mind that US 6 east of there is the Long Mountain Parkway (leading to an overlap with the Palisades Interstate Parkway) and is restricted to passenger cars only. Not to mention, current NY 293 was the routing of US 6 before the Long Mountain Parkway was!
Quote from: Plutonic Panda on September 04, 2019, 04:23:36 PM
Quote from: jakeroot on September 04, 2019, 01:10:58 PM
Quote from: froggie on September 04, 2019, 07:35:11 AM
Quote from: Plutonic Panda on September 03, 2019, 06:14:00 PM
Will we ever get a stack interchange between two super-2s? That would be cool.
Highly unlikely. Any volume of traffic that would warrant a stack with all 4 quadrant flyovers would also likely require at least 4 lanes on each mainline.
The closest thing I can think of to such a setup, would be US-2 and WA-204 east of Everett. It's not a full stack, but it has characteristics of a stack. It does not qualify for this thread however, as two of the approaches are divided carriageway.
Google Maps: https://maps.app.goo.gl/6ZZQ39hSsYdz4Df87
Interesting. Are there plans to expand the super two setup further east on US-2?
My understanding is that WSDOT wants to extend the freeway portion of US-2 all the way past Monroe, via a new bypass. The interchanges along the current stretch of the super-2 were built to support this.
If you look at a map of the area, WA-522 in Monroe ends at US-2. the idea is for this freeway to be extended to meet the bypass. I think with a roundabout at first, but then full interchanges later.
Quote from: jemacedo9 on September 04, 2019, 04:33:22 PMPA 252 south starting at that interchange is a 4 lane arterial...and has been as long as I can remember (late 80s?)
The southernmost point of where it becomes a 4-laner is at the PA 3/Chester Pike intersection. Based on Historic Aerials, that stretch has been a 4-laner since 1971. The widening likely coincided with the building of that interchange in Wyola.
Quote from: Beltway on September 04, 2019, 04:53:28 PMI did think about the absence of I-476 then, but it was in planning since 1956, and based on how PA-252 curves to the northwest, I am unsure as to how much traffic relief that I-476 would provide to PA-252.
For points west of the 252 corridor, the opening of I-476 wouldn't have had much of a traffic impact. But for areas in-between PA 252 & 320, pre-I-476, one would use either road depending on traffic and/or destination. Even today, there have been times I've used PA 252 en lieu of I-476 coming back from Valley Forge Park due to the traffic along I-76 eastbound between US 202 & I-476 being a parking lot.
Quote from: PHLBOS on September 05, 2019, 08:58:35 AM
Quote from: Beltway on September 04, 2019, 04:53:28 PMI did think about the absence of I-476 then, but it was in planning since 1956, and based on how PA-252 curves to the northwest, I am unsure as to how much traffic relief that I-476 would provide to PA-252.
For points west of the 252 corridor, the opening of I-476 wouldn't have had much of a traffic impact. But for areas in-between PA 252 & 320, pre-I-476, one would use either road depending on traffic and/or destination. Even today, there have been times I've used PA 252 en lieu of I-476 coming back from Valley Forge Park due to the traffic along I-76 eastbound between US 202 & I-476 being a parking lot.
From the area around Villanova and Devon, when heading south I typically used US-202 and I-76, granted that was south of Wilmington. Going to southern Delaware County, the routes would include PA-320 or PA-252 and maybe PA-452.
In any event, both PA-320 and PA-252 look like no effort/plan was ever made to upgrade them into 4-lane arterial routes, given the kinds of right-of-way impacts would occur, and given the plan to build I-476. Even though there were some serious doubts in the late 1970s and early 1980s that I-476 would ever get completed, PennDOT always did pursue the completion as much as they could.
US 26 & US 101 near Seaside, OR.
Quote from: Beltway on September 04, 2019, 04:53:28 PM
Quote from: PHLBOS on September 04, 2019, 04:21:09 PM
Based on Historic Aerials, the [Wyola] interchange has existed since 1971.
As for why was such constructed that way early on... such may have been part of an initial plan to upgrade PA 252 into a 4-lane divided highway that never fully materialized. Keep in mind, due to the absence of I-476 at the time; roads like PA 252 & 320 likely saw more through-traffic usage.
Side bar: how long has Episcopal Academy been there (west of the interchange)?
I first drove it in fall of 1972, and I don't recall any school there then. I did think about the absence of I-476 then, but it was in planning since 1956, and based on how PA-252 curves to the northwest, I am unsure as to how much traffic relief that I-476 would provide to PA-252.
PennDOT did spend a fortune to build the interchange at PA-320 and US-1 in the late 1970s, and while that was a very congested intersection, that was directly relievable by the planned I-476.
Mind you, PA 252 originally(?) turned right onto St. David Rd and meandered into Wayne (St. David, Brooke, Connstoga, S Wayne, N Wayne) and then north to (almost) King of Prussia
252's routing change might of had more to do with the opening of the 202 bypass between West Chester and KoP.
As for that school, I can't help you PHLBOS. My mom & uncles all attended Radnor Twp. HS during the 1960s.
Quote from: Hot Rod Hootenanny on September 05, 2019, 11:10:55 PMMind you, PA 252 originally(?) turned right onto St. David Rd and meandered into Wayne (St. David, Brooke, Connstoga, S Wayne, N Wayne) and then north to (almost) King of Prussia
252's routing change might of had more to do with the opening of the 202 bypass between West Chester and KoP.
FWIW, based on the Wiki account, PA 252's current northern alignment dates back to 1970; just about the time that Wyola interchange was built and the road was widened.
Quote from: Hot Rod Hootenanny on September 05, 2019, 11:10:55 PMAs for that school, I can't help you PHLBOS. My mom & uncles all attended Radnor Twp. HS during the 1960s.
While checking the above on Wiki; I have since found out that the school has been at its current location since 2008. I knew it was recent; I just wasn't sure
how recent.
Quote from: ozarkman417 on September 03, 2019, 07:49:12 PM
There are several along US 400 in Kansas. Some include: US-400xUS-59 in Parsons, US-400xUS-169, and US-400xUS-75.
Another one in Kansas - this up in the North Central part of the state. US-36 and KS-181, just outside of Lebanon - which itself is very near the geographic center of the Lower 48.
It's looking like Colorado doesn't have any that fully fit the bill. US 34 and Hwy 39 (https://www.google.com/maps/@?api=1&map_action=map¢er=40.247524,-104.055772&zoom=16&basemap=satellite) might be the closest in isolation, but it's mixed with an interchange between I-76 (four lanes) and Hwy 39/52.
One I'd thought qualified is in Julesburg, between US 138 and US 385 (https://www.google.com/maps/@?api=1&map_action=map¢er=40.991728,-102.252790&zoom=16&basemap=satellite), which gets 385 over the railroad. Through town, though, US 138-385/1st St has four lanes, with the outer lanes becoming the interchange's southwestern ramps.
There's an interchange that was almost between two two-lane roads in Castle Rock: US 85 and Castle Rock Pkwy/N Meadows Dr (https://www.google.com/maps/@?api=1&map_action=map¢er=39.420467,-104.888433&zoom=17&basemap=satellite), also there to avoid a railroad. During construction of the project that put in the interchange (the "North Meadows extension," from near the school to the south up to I-25, including that interchange as well), the town and county decided to build Castle Rock Pkwy with four lanes instead of the planned two.
As it is, there are only two through lanes in each direction, although it's built to accommodate four each way. On the overpass, the island curbs that don't have a colored filling behind them suggest what would move to accommodate more lanes on N Meadows Dr.
Driving underneath, the structure is sort of imposing when you're on the two-lane US 85, but that's kind of cool, too; the design, viaduct-style with visible piers, seems unusual for Colorado, where, at least in my head, most new builds use some sort of wall for support and use bridges sparingly.
Route 1 has two in Deer Lake, Newfoundland.
SR 26 and SR 17[/urk] in Othello, WA (https://www.google.com/maps/@46.8108487,-119.1346305,1538m/data=!3m1!1e3)
Quote from: Bruce on September 24, 2019, 08:30:53 PM
SR 26 and SR 17 (https://www.google.com/maps/@46.8108487,-119.1346305,1538m/data=!3m1!1e3) in Othello, WA
Fixed your formatting.
Here's a partial one... Lake County V76 and V61 near Hawthorn Woods IL.
County Hwy V61
https://maps.app.goo.gl/B1NW7uTxqagKnRWw9
29897 N Gilmer Rd
https://maps.app.goo.gl/qSjWRTzhtLh69aa4A
Literally every interchange between the Blue Ridge Parkway and a two lane road.
^ The vast majority of those are not full interchanges though. They're mainly one- or two-quadrant access roads that have at-grade intersections on the Parkway proper.
NH 101 and 122 in Milford
https://www.google.com/maps/@42.8452097,-71.615187,287m/data=!3m1!1e3
North Dakota Examples:
Minot, US 83 Bypass
https://www.google.com/maps/place/Minot,+ND/@48.2400692,-101.3375867,766m/data=!3m1!1e3!4m5!3m4!1s0x52deb78ae5ce7f0d:0xbcc590331b734416!8m2!3d48.2329668!4d-101.2922906
This one soon won't qualify as the bypass is being rebuilt into a four lane road.
Not quite sure if this counts, but at least one other posting had something similar so I am listing it:
US 12 and ND 67 intersection in Scranton, ND
https://www.google.com/maps/place/Scranton,+ND/@46.1453182,-103.1460204,387m/data=!3m1!1e3!4m5!3m4!1s0x532f25b75ed50e57:0x3da59a4fd6bf4f3e!8m2!3d46.1480618!4d-103.14295
Some more from Washington are three interchanges each along US 101 in Shelton (at WA 3 (https://www.google.com/maps/@47.1806384,-123.0979781,835m/data=!3m1!1e3?hl=en&authuser=0), W Railroad Ave/Shelton Matlock Rd (https://www.google.com/maps/@47.2059439,-123.1262599,1000m/data=!3m1!1e3?hl=en&authuser=0), and Wallace Kneeland Blvd (https://www.google.com/maps/@47.2308585,-123.1279907,705m/data=!3m1!1e3?hl=en&authuser=0)) and in Sequim (at Simdars Rd (https://www.google.com/maps/@48.0682813,-123.069497,450m/data=!3m1!1e3?hl=en&authuser=0), S Sequim Ave (https://www.google.com/maps/@48.0731768,-123.102132,268m/data=!3m1!1e3?hl=en&authuser=0), and River Rd (https://www.google.com/maps/@48.0742501,-123.134916,452m/data=!3m1!1e3?hl=en&authuser=0)).
Multiple examples in Utah, mostly on super-twos:
- US 6 at SR 55/Business 6 (exit 240) (https://www.google.com/maps/@39.6000526,-110.8268098,664m/data=!3m1!1e3)
- US 6 at SR 10 (exit 241) (https://www.google.com/maps/@39.5877166,-110.8120144,664m/data=!3m1!1e3)
- US 6 at SR 55/Business 6 (exit 243) (https://www.google.com/maps/@39.5860291,-110.7889557,664m/data=!3m1!1e3)
- SR 7 at Desert Canyon Parkway (exit 6) (https://www.google.com/maps/@37.0087705,-113.5134883,688m/data=!3m1!1e3)
- SR 7 at Airport Parkway (exit 7) (https://www.google.com/maps/@37.0146901,-113.4966828,688m/data=!3m1!1e3)
- SR 7 at Warner Valley Road (exit 10) (https://www.google.com/maps/@37.0584754,-113.4883989,1375m/data=!3m1!1e3)
- SR 7 at Long Valley Road (exit 15) (https://www.google.com/maps/@37.1139253,-113.4525409,687m/data=!3m1!1e3)
- SR 10 at SR 57 (exit 34) (https://www.google.com/maps/@39.1759323,-111.0480161,668m/data=!3m1!1e3)
- SR 57 at SR 29 (https://www.google.com/maps/@39.2544211,-111.09773,333m/data=!3m1!1e3) - this is the really weird one, because it's out in the middle of nowhere on two state routes that are dead end mining spurs.
Quote from: US 89 on December 08, 2019, 02:54:00 PM
Multiple examples in Utah, mostly on super-twos:
- US 6 at SR 55/Business 6 (exit 240) (https://www.google.com/maps/@39.6000526,-110.8268098,664m/data=!3m1!1e3)
- US 6 at SR 10 (exit 241) (https://www.google.com/maps/@39.5877166,-110.8120144,664m/data=!3m1!1e3)
- US 6 at SR 55/Business 6 (exit 243) (https://www.google.com/maps/@39.5860291,-110.7889557,664m/data=!3m1!1e3)
- SR 7 at Desert Canyon Parkway (exit 6) (https://www.google.com/maps/@37.0087705,-113.5134883,688m/data=!3m1!1e3)
- SR 7 at Airport Parkway (exit 7) (https://www.google.com/maps/@37.0146901,-113.4966828,688m/data=!3m1!1e3)
- SR 7 at Warner Valley Road (exit 10) (https://www.google.com/maps/@37.0584754,-113.4883989,1375m/data=!3m1!1e3)
- SR 7 at Long Valley Road (exit 15) (https://www.google.com/maps/@37.1139253,-113.4525409,687m/data=!3m1!1e3)
- SR 10 at SR 57 (exit 34) (https://www.google.com/maps/@39.1759323,-111.0480161,668m/data=!3m1!1e3)
- SR 57 at SR 29 (https://www.google.com/maps/@39.2544211,-111.09773,333m/data=!3m1!1e3) - this is the really weird one, because it's out in the middle of nowhere on two state routes that are dead end mining spurs.
SR 29 is not dead end
Quote from: TheGrassGuy on December 08, 2019, 06:32:39 PM
SR 29 is not dead end
Okay, does not connect to any other state routes on the west end.
It is a dead end for half the year though, as Ephraim Canyon Road closes in winter.
There are a handful of unmentioned New York examples:
- NY 18 at NY 104 in Lewiston (https://www.google.com/maps/@43.1727483,-79.018351,651m/data=!3m1!1e3). Note that NY 18 ends at NY 104 a mile to the southwest.
- US 20 at NY 98 in Alexander (https://www.google.com/maps/@42.9049775,-78.2545687,570m/data=!3m1!1e3). I'm assuming this dates to when US 20 was rerouted here from US 20A in the 1930s. Left turns across US 20 are banned.
- NY 5S at NY 51 in Ilion (https://www.google.com/maps/@43.0199893,-75.0320275,639m/data=!3m1!1e3). NY 5S is a super 2 in this area.
- Bear Mountain Parkway at Highland Avenue in Peekskill (https://www.google.com/maps/@41.3021082,-73.9213289,286m/data=!3m1!1e3). The other two interchanges have 3+ lanes on at least one of the roads involved.
- Bethpage Parkway at Central Avenue/Merritts Road in Bethpage (https://www.google.com/maps/@40.7357082,-73.4704383,372m/data=!3m1!1e3)
Quote from: TheGrassGuy on December 08, 2019, 06:32:39 PM
Quote from: US 89 on December 08, 2019, 02:54:00 PM
Multiple examples in Utah, mostly on super-twos:
- US 6 at SR 55/Business 6 (exit 240) (https://www.google.com/maps/@39.6000526,-110.8268098,664m/data=!3m1!1e3)
- US 6 at SR 10 (exit 241) (https://www.google.com/maps/@39.5877166,-110.8120144,664m/data=!3m1!1e3)
- US 6 at SR 55/Business 6 (exit 243) (https://www.google.com/maps/@39.5860291,-110.7889557,664m/data=!3m1!1e3)
- SR 7 at Desert Canyon Parkway (exit 6) (https://www.google.com/maps/@37.0087705,-113.5134883,688m/data=!3m1!1e3)
- SR 7 at Airport Parkway (exit 7) (https://www.google.com/maps/@37.0146901,-113.4966828,688m/data=!3m1!1e3)
- SR 7 at Warner Valley Road (exit 10) (https://www.google.com/maps/@37.0584754,-113.4883989,1375m/data=!3m1!1e3)
- SR 7 at Long Valley Road (exit 15) (https://www.google.com/maps/@37.1139253,-113.4525409,687m/data=!3m1!1e3)
- SR 10 at SR 57 (exit 34) (https://www.google.com/maps/@39.1759323,-111.0480161,668m/data=!3m1!1e3)
- SR 57 at SR 29 (https://www.google.com/maps/@39.2544211,-111.09773,333m/data=!3m1!1e3) - this is the really weird one, because it's out in the middle of nowhere on two state routes that are dead end mining spurs.
SR 29 is not dead end
SR dead is not end 29
US 57 and FM 140, Texas
Chickasaw Turnpike/US-177
Chickasaw Turnpike/Dolberg Rd
US 50 has 3 of them in Illinois . It may have more depending on the design of the Lebanon bypass.
Quote from: 3467 on December 22, 2019, 08:27:34 AM
US 50 has 3 of them in Illinois . It may have more depending on the design of the Lebanon bypass.
Except US 50 widens out to four lanes with a grass median for two of them.
At IL 160 (https://goo.gl/maps/Q7ms566SXMjP2GbA7)
At Breese (https://goo.gl/maps/vCYE2vHLccWZZiB27)
The third one is really odd. It's a 2 lane extended to the main road to allow access to an overpass.
US 20 and MA 140
Route 84 (Niles Canyon Road) and Main Street, Sunol, CA:
https://www.google.com/maps/place/Sunol,+CA/@37.5937724,-121.8918639,17.54z/data=!4m5!3m4!1s0x808fc23398d75b01:0x4494cb0395e64a97!8m2!3d37.5940369!4d-121.8884812
Historicaerials shows that this Y interchange has existed as far back as 1946.
Quote from: 3467 on December 22, 2019, 05:01:52 PM
The third one is really odd. It's a 2 lane extended to the main road to allow access to an overpass.
Well, it looks like someone has never heard of the Blue Ridge Parkway...
Quote from: TheGrassGuy on December 24, 2019, 08:18:22 AM
Quote from: 3467 on December 22, 2019, 05:01:52 PM
The third one is really odd. It's a 2 lane extended to the main road to allow access to an overpass.
Well, it looks like someone has never heard of the Blue Ridge Parkway...
Or the Natchez Trace Parkway...
Strange proto-interchange between US-65 and the Lincoln Highway in Colo, IA. At the time it was built, the Lincoln was still US-30.
https://www.google.com/maps/search/us-65+and+lincoln+highway/@42.0221835,-93.3093931,748m/data=!3m1!1e3
Why would they build interchanges for 2-lane roads though?
Quote from: andrepoiy on January 05, 2020, 07:01:55 PM
Why would they build interchanges for 2-lane roads though?
There are areas where cross traffic/terrain make it beneficial to do so even if the roads themselves don't merit 4 laning.
Quote from: andrepoiy on January 05, 2020, 07:01:55 PM
Why would they build interchanges for 2-lane roads though?
So people don't have to stop.
Quote from: Ben114 on December 22, 2019, 05:09:23 PMUS 20 and MA 140
Nope, US 20 is 3-lanes just east of the MA 140 overpass (https://www.google.com/maps/@42.2501556,-71.711991,3a,75y,64.7h,67.45t/data=!3m7!1e1!3m5!1sWFk6iJhhgqEo38pyt1QRiQ!2e0!5s20181001T000000!7i13312!8i6656) and continues as a 3-to-4 laner west of MA 140.
Quote from: PHLBOS on January 06, 2020, 01:18:15 PM
Quote from: Ben114 on December 22, 2019, 05:09:23 PMUS 20 and MA 140
Nope, US 20 is 3-lanes just east of the MA 140 overpass (https://www.google.com/maps/@42.2501556,-71.711991,3a,75y,64.7h,67.45t/data=!3m7!1e1!3m5!1sWFk6iJhhgqEo38pyt1QRiQ!2e0!5s20181001T000000!7i13312!8i6656) and continues as a 3-to-4 laner west of MA 140.
But that 3rd lane is just an aux lane.