This is a thread about divided highways going over and under an obsticle. Here is an interesting oddity north of Amarillo:
https://goo.gl/maps/1KNRxYYN8vN2
I think the highway had one carriageway, and went under the tracks, but when the road was widens, the underpass couldn't be widened, so they built a bridge over the tracks to save money. Any more of these? Is my theory right?
There's a configuration like that west of Chelsea, MI on I-94: https://www.google.com/maps/@42.2946212,-84.0859395,1295m/data=!3m1!1e3?hl=en
As far as I know, this highway was devised in that manner; both sides were built at the same time. Old US-12, that the freeway replaced, is about 1/2 mile east of the railroad.
The New Jersey Turnpike does this at exit 7; normally, ramps from the car lanes go over the truck lanes, but here the reverse happens, since the truck lanes were added later and exit 7 wasn't rebuilt as part of the project.
https://goo.gl/maps/RdCEguCyfJx
Here's one I thought was cool-looking enough to photograph. This is GA 72 westbound west of Elberton (https://www.google.com/maps/@34.0758984,-82.9667589,266m/data=!3m1!1e3). The lower roadway was built to its current state in the mid '60's, and the higher roadway was added in 1999, IIRC. The new bridge is pretty long as well as high and has T-shaped piers, which looked really cool when it was first built, but the trees in the median are so tall and dense now that you can barely even see the bridge.
(https://i.imgur.com/oq7d6dM.jpg?1)
Quote from: GaryV on October 07, 2017, 04:29:49 PM
There's a configuration like that west of Chelsea, MI on I-94: https://www.google.com/maps/@42.2946212,-84.0859395,1295m/data=!3m1!1e3?hl=en
As far as I know, this highway was devised in that manner; both sides were built at the same time. Old US-12, that the freeway replaced, is about 1/2 mile east of the railroad.
There's another one on I-94 (and 90/39) southeast of Portage, WI. I'm not sure what road is being " undoverpassed there.
I-35 at Cesar Chavez St in Austin Tx:
https://www.google.com/maps/@30.2616588,-97.7363717,3a,75y,173.73h,81.95t/data=!3m7!1e1!3m5!1sy6PJ-E0XPuDDwboB8TftoQ!2e0!6s%2F%2Fgeo3.ggpht.com%2Fcbk%3Fpanoid%3Dy6PJ-E0XPuDDwboB8TftoQ%26output%3Dthumbnail%26cb_client%3Dmaps_sv.tactile.gps%26thumb%3D2%26w%3D203%26h%3D100%26yaw%3D15.871571%26pitch%3D0%26thumbfov%3D100!7i13312!8i6656?hl=en-US (https://www.google.com/maps/@30.2616588,-97.7363717,3a,75y,173.73h,81.95t/data=!3m7!1e1!3m5!1sy6PJ-E0XPuDDwboB8TftoQ!2e0!6s%2F%2Fgeo3.ggpht.com%2Fcbk%3Fpanoid%3Dy6PJ-E0XPuDDwboB8TftoQ%26output%3Dthumbnail%26cb_client%3Dmaps_sv.tactile.gps%26thumb%3D2%26w%3D203%26h%3D100%26yaw%3D15.871571%26pitch%3D0%26thumbfov%3D100!7i13312!8i6656?hl=en-US)
The Lodge Freeway at the Davison Freeway in Detroit, MI. (https://goo.gl/maps/ZAyPerFveeH2)
The Lodge Freeway at Telegraph Road in Southfield, MI (https://goo.gl/maps/CqXi44egMeB2), with I-696 between the Lodge carriageways.
Quote from: GaryV on October 07, 2017, 04:29:49 PM
There's a configuration like that west of Chelsea, MI on I-94: https://www.google.com/maps/@42.2946212,-84.0859395,1295m/data=!3m1!1e3?hl=en
As far as I know, this highway was devised in that manner; both sides were built at the same time. Old US-12, that the freeway replaced, is about 1/2 mile east of the railroad.
A 1955 aerial shows only the westbound side existing (as an undivided surface road).
The 405 south of Bellevue, Washington formerly had a grade situation like in the OP. Northbound 405 went over the railway, but southbound 405 went through a tunnel below the railway: https://goo.gl/PwBHLs
The tunnel was built in the 70s, replacing what was originally an underpass beneath the railway. The southbound carriageway was built before the northbound carriageway (in the 40s, as Secondary State Highway 2A). The terrain is quite hilly through there, so when the 405 was built, it must have been decided that a bridge over the railway for the NB carriageway was easier than twinning the original road. The tunnel, and the railway that travelled above it, were eliminated in 2008.
Quote from: NE2 on October 08, 2017, 02:21:24 AM
Quote from: GaryV on October 07, 2017, 04:29:49 PM
There's a configuration like that west of Chelsea, MI on I-94: https://www.google.com/maps/@42.2946212,-84.0859395,1295m/data=!3m1!1e3?hl=en
As far as I know, this highway was devised in that manner; both sides were built at the same time. Old US-12, that the freeway replaced, is about 1/2 mile east of the railroad.
A 1955 aerial shows only the westbound side existing (as an undivided surface road).
You are correct. I didn't realize that the road now known as "Old US Hwy 12" which goes through Chelsea is really the "old-old" route. Chelsea was bypassed in 1940 with a two-lane routing of US-12, and that roadway was twinned to make I-94.
What about:
https://goo.gl/maps/qmZrUSJuqsx
Which one was built first? I think the bridge was built first, then the tunnel expanded the road to 4 lanes.
There were several of these along CA (former US) 99 in the San Joaquin Valley: one just south of Famoso (the CA 46 junction), one at CA 198 (the original interchange was built around this split-level separation), one at Chowchilla just north of the CA 152 interchange, and the final example south of Elk Grove just south of the Grant Line Road interchange. The latter two remain in their original "over/under" format; the other two were replaced by simple twin overpasses on CA 99. Curiously, the "under" segment at the 99/198 interchange is still in use, functioning as the carriageway for eastbound CA 198.
Quote from: MCRoads on October 08, 2017, 02:44:03 PM
What about:
https://goo.gl/maps/qmZrUSJuqsx
Which one was built first? I think the bridge was built first, then the tunnel expanded the road to 4 lanes.
http://www.google.com/search?q=belle+chasse+bridge
Ever since I first saw the over/under bridges of I-81 and PA 307 (https://www.google.com/maps/@41.3957277,-75.6469376,18z/data=!3m1!1e3) in 2002 or so, I thought it was weird. I'm guessing it was built that way due to the terrain. I can't think of any other over/under bridges I've seen off the top of my head.
I can think of a couple off the top of my head...
- Taconic State Parkway over NY 129 (https://www.google.com/maps/@41.2403151,-73.8149577,412m/data=!3m1!1e3). Parkway here was originally 4 lanes undivided on the right, new alignment built on the left in the late 60s-early 70s when the Taconic was widened to 6 lanes. There are two more in this area, one being at the next interchange north (https://www.google.com/maps/@41.2537071,-73.8084417,412m/data=!3m1!1e3), another south of the reservoir. Both were constructed as such because of the realignment.
- I-80 and I-271 (https://www.google.com/maps/@41.253213,-81.5862337,823m/data=!3m1!1e3) south of Cleveland. This is due to terrain.
The Grand Avenue railroad bridges in greater Phoenix have an over/under configuration similar to the OP:
https://goo.gl/maps/y2KLpUByxix
In fact, the entire Grand Ave corridor from I-17 to Surprise has a bevy of unique bridge configurations and partial interchanges, due to an effort undertaken in the early 2000's by ADOT to eliminate busy 6-leg intersections, railroad crossings, and improve overall throughput along the route. In some cases, Grand Ave got the bridge. In others, the major arterial route it crossed got preference depending on need.
The most recent upgrade, which isn't visible on google maps as of right now, is at Bell Road where a new bridge carries Bell over the railroad and Grand Ave. Access between the two roads is via ramps in the median of Grand Ave:
https://www.surpriseaz.gov/3181/Bell-Grand-Interchange-Improvements
Quote from: MCRoads on October 07, 2017, 03:31:56 PM
This is a thread about divided highways going over and under an obsticle. Here is an interesting oddity north of Amarillo:
https://goo.gl/maps/1KNRxYYN8vN2
I think the highway had one carriageway, and went under the tracks, but when the road was widens, the underpass couldn't be widened, so they built a bridge over the tracks to save money. Any more of these? Is my theory right?
I'm not sure that money would be the #1 motivator. I would guess that the #1 motivator is to not disrupt the railway line. You can do that easier by building a bridge over the railway line than adding a bridge for the railway line to cross. You can certainly do the latter by building a temporary track around where the bridge is built. But the former sounds cheaper since even a temporary track needs to be able to support the weight of a train. So money would be the #2 motivator IMO.
If you could disrupt the railway line then avoiding a temporary track and just building a new bridge for the railway line to cross sounds like the cheapest option. But then again I'm not a rail geek.
Not related to interchanges
* Two on US 36 in Missouri: One near Callao (https://www.google.com/maps/@39.7554451,-92.6122653,561m/data=!3m1!1e3?hl=en), and another near Bucklin (https://www.google.com/maps/@39.7599685,-92.9116937,336m/data=!3m1!1e3?hl=en)
* One in Tennessee between I-40 and TN 299/Airport Road (https://www.google.com/maps/@35.8874366,-84.6876877,703m/data=!3m1!1e3?hl=en)
* One on the West Virginia Turnpike (https://www.google.com/maps/@37.8465161,-81.2367203,591m/data=!3m1!1e3?hl=en)
Related to interchanges
* I-55 has two in East St. Louis, Illinois: One at the interchange with the MLK Bridge (https://www.google.com/maps/@38.6281592,-90.1608835,413m/data=!3m1!1e3?hl=en), and another a short distance east at the interchange with I-64 and I-70, (https://www.google.com/maps/@38.6335878,-90.1470251,492m/data=!3m1!1e3?hl=en). At both of these the top level of ramps were not part of the original interchanges.
* I-44 at I-55 and Gravois south of Downtown St. Louis (https://www.google.com/maps/@38.6105363,-90.2092329,494m/data=!3m1!1e3?hl=en)
* IIRC, I-40 used to have one east of I-275 in Knoxville, Tennessee
Other
*There's always the western double deck section of US 40 in St. Louis (https://www.google.com/maps/@38.6314636,-90.235237,352m/data=!3m1!1e3?hl=en)
Quote from: GaryV on October 07, 2017, 04:29:49 PM
There's a configuration like that west of Chelsea, MI on I-94: https://www.google.com/maps/@42.2946212,-84.0859395,1295m/data=!3m1!1e3?hl=en (https://www.google.com/maps/@42.2946212,-84.0859395,1295m/data=!3m1!1e3?hl=en)
As far as I know, this highway was devised in that manner; both sides were built at the same time. Old US-12, that the freeway replaced, is about 1/2 mile east of the railroad.
That's OLD-old US-12. Half of the current I-94 (WBD, I believe) between Chelsea and exit 147 near Jackson was an improved 2-lane US-12 originally, then the other carriageway was added later. The WBD side was constructed in the mid-1930's, opening to traffic in 1937. The EBD side was likely constructed in the early 1950's, prior to the 1959 designation of I-94. More: http://www.michiganhighways.org/listings/US-012.html (http://www.michiganhighways.org/listings/US-012.html)
For the most part, it's invisible, but you'll notice just east of exit 147 the WBD lanes follow the terrain more closely while the EBD lanes are very level. The over-under railroad crossing just west of Chelsea is the other dead giveaway - the WBD underpass (particularly with the steep climb immediately following) is evidence of the route's pre-Interstate heritage. EBD has it's own quirkiness - that sharp right curve immediately east of Kalmbach Rd to obtain sufficient clearance away from the WBD underpass, then a sharp left to come back to the original alignment.
If MDOT was to rebuild this stretch today, it would route all 6 lanes (because traffic definitely warrants it) directly between the existing EBD and WBD lanes as an overpass, with a more gentle curve.
The ultimate example of this is A282 East of London, UK :sombrero:.
Quote from: Brian556 on October 08, 2017, 12:59:25 AM
I-35 at Cesar Chavez St in Austin Tx:
https://www.google.com/maps/@30.2616588,-97.7363717,3a,75y,173.73h,81.95t/data=!3m7!1e1!3m5!1sy6PJ-E0XPuDDwboB8TftoQ!2e0!6s%2F%2Fgeo3.ggpht.com%2Fcbk%3Fpanoid%3Dy6PJ-E0XPuDDwboB8TftoQ%26output%3Dthumbnail%26cb_client%3Dmaps_sv.tactile.gps%26thumb%3D2%26w%3D203%26h%3D100%26yaw%3D15.871571%26pitch%3D0%26thumbfov%3D100!7i13312!8i6656?hl=en-US (https://www.google.com/maps/@30.2616588,-97.7363717,3a,75y,173.73h,81.95t/data=!3m7!1e1!3m5!1sy6PJ-E0XPuDDwboB8TftoQ!2e0!6s%2F%2Fgeo3.ggpht.com%2Fcbk%3Fpanoid%3Dy6PJ-E0XPuDDwboB8TftoQ%26output%3Dthumbnail%26cb_client%3Dmaps_sv.tactile.gps%26thumb%3D2%26w%3D203%26h%3D100%26yaw%3D15.871571%26pitch%3D0%26thumbfov%3D100!7i13312!8i6656?hl=en-US)
I came here to cite this one. The architecture looks (to my amateur eyes) to date from the 1950's and the original construction of I-35. Were the southbound lanes the original path of US 81 and/or East Ave, does anyone know?
I-287 at I-80 in Parsippany, NJ does this.
https://www.google.com/maps/@40.8637455,-74.4178581,875m/data=!3m1!1e3
The I-65 and I-20/59 (https://goo.gl/maps/NnarqFz8UTJ2) junction in Birmingham, AL has a case similar to the OP. The north/eastbound lanes of I-20/59 go over I-65, while the opposite direction goes under it.
I-376/US 22/US 30 passing the 10th Street Bridge (https://goo.gl/maps/MtnwuSWDNSt) in Pittsburgh, PA is another example. Eastbound traffic passes under the bridge, while westbound passes over.
I wasn't going to post this, but it's in the same vein as many others above me. The 405/518 interchange with the 5 in Tukwila, Washington has a westbound carriageway that goes over the 5, whereas the eastbound carriageway passes beneath the 5. This is simply due to the design of the interchange, with the left-side ramps for various movements, requiring some higher bridges.
See here on Google Maps: https://goo.gl/fSZaRw -- and here on Historic Aerials, back in 1968, around when the junction was built: https://goo.gl/Dq7e5k
^ That reminds me of another one. I-196 goes above (wb) and below (eb) US-131 in Grand Rapids. At the same location US-131 switches left/right, to create a kind of diverging diamond interchange.
Quote from: jakeroot on October 15, 2017, 10:23:01 PM
I wasn't going to post this, but it's in the same vein as many others above me. The 405/518 interchange with the 5 in Tukwila, Washington has a westbound carriageway that goes over the 5, whereas the eastbound carriageway passes beneath the 5. This is simply due to the design of the interchange, with the left-side ramps for various movements, requiring some higher bridges.
I-70 also does this at its interchange with I-77 (https://www.google.com/maps/@39.9986058,-81.5583569,711m/data=!3m1!1e3).
now that i think about it, I-35/235/40 in OKC does a weird thing like this...
here's the link: https://goo.gl/maps/Ks7R1w3qhpj
The I-80/I-81 Interchange near Hazleton, PA.
https://www.google.com/maps/place/Hazleton,+PA/@41.0452947,-76.0155148,1320m/data=!3m1!1e3!4m5!3m4!1s0x89c5a4132867b6b1:0x442d01bc719543f4!8m2!3d40.9584181!4d-75.9746472
The only one I can think of is US 20 somewhere east of Dubuque has an odd interchange on the westbound side while the eastbound side has an at grade intersection.
Washington US 195, 15 miles south of Spokane. https://goo.gl/maps/umbPMQgGXgN2
Not sure this counts but in Richmond where I-64, I-95 and I-195 meets (Bryan Park Interchange), there are ramps from I-95 SB to I-195 and from I-195 to I-95 NB. I-64 WB goes over these ramps while I-64 EB goes under them.
I'm thinking I-64's interchange with I-95 (which was built before I-195 existed) was graded the way it was with I-195 in mind, maybe.
https://goo.gl/maps/KSkaiDp1rtj
Another one in Washington that sort of counts is I-5 in Woodland at the Dike Access Road interchange (exit 22). The original northbound bridge dates to the late 40's or early 50's from an expressway realignment of US 99/ US 830. The southbound bridge is higher and dates to circa 1972 when I-5 was widened out to the 6-lane configuration it is today.
https://www.google.com/maps/@45.930087,-122.7545222,15z?hl=en
I-64/77 and WV 114 in Charleston, WV (https://goo.gl/maps/mGxFgDqYET12) due to the terrain.
I-89 and County Rd. in New London, NH, between Exit 11 and Exit 12.
US 30 WB goes over OH 83 as well as Pittsburgh Ave/Lincoln Hwy while US 30 EB goes under both near Wooster, Ohio (https://www.google.com/maps/@40.7964311,-81.9161172,784m/data=!3m1!1e3?hl=en-US). (I hope I didn't miss this one above.) It was this way even when US 30 exited at the Lincoln Hwy exits and went east on the old road until the expressway between Wooster and OH 57 near Orrville was completed.
Quote from: dvferyance on November 09, 2017, 03:15:42 PM
The only one I can think of is US 20 somewhere east of Dubuque has an odd interchange on the westbound side while the eastbound side has an at grade intersection.
https://goo.gl/maps/YfqfTSLRi6Q2 (https://goo.gl/maps/YfqfTSLRi6Q2)
Quote from: dvferyance on November 09, 2017, 03:15:42 PM
The only one I can think of is US 20 somewhere east of Dubuque has an odd interchange on the westbound side while the eastbound side has an at grade intersection.
https://www.google.com/maps/@42.4629034,-90.5152782,1120m/data=!3m1!1e3
I-80 and I-287 in Parsippany, NJ where NB I-287 crosses under I-80 while its SB counterpart crosses over it.
The Garden State Parkway at NJ 3 in Clifton, NJ where the NB Parkway goes over Route 3 and Allwood Road while SB crosses under the 2 roadways.
US 202 & 206 used to have separate grades at US 22 in Somerville before the Commons Mall was constructed. The current EB to NB ramp under US 22 was the NB lanes of US 202 & 206.
In San Diego there is part of CA 75 where SB has a flyover a beach park entrance while the NB side has an at grade signalized intersection.
In Fort Myers, FL on US 41 at FL 82 the NB lanes of 41 flyover the intersection while the SB lanes pass through it at grade.
I recall seeing something like that NW of Winona, MN on US 61.
Quote from: seicer on June 04, 2018, 04:34:09 PM
I-64/77 and WV 114 in Charleston, WV (https://goo.gl/maps/mGxFgDqYET12) due to the terrain.
That reminds me of this one (https://www.google.com/maps/@47.45749,-122.2629237,3a,39.7y,281.35h,84.8t/data=!3m6!1e1!3m4!1sCYwBo6OKZE91pgDSzv0rUQ!2e0!7i13312!8i6656?hl=en), down south of Seattle (by Southcenter).
Quote from: jay8g on June 10, 2018, 03:40:45 AM
Quote from: seicer on June 04, 2018, 04:34:09 PM
I-64/77 and WV 114 in Charleston, WV (https://goo.gl/maps/mGxFgDqYET12) due to the terrain.
That reminds me of this one (https://www.google.com/maps/@47.45749,-122.2629237,3a,39.7y,281.35h,84.8t/data=!3m6!1e1!3m4!1sCYwBo6OKZE91pgDSzv0rUQ!2e0!7i13312!8i6656?hl=en), down south of Seattle (by Southcenter).
Funny. Post #23 (made by myself) mentions the 405 over-under split at I-5, but I completely forgot about Klickitat Ave just to the south! There is definitely some funky geography in the area.
Rosborough Springs Rd. in East Texas. Westbound I-20 goes over it, while eastbound goes under it.
https://www.google.com/maps/@32.4897218,-94.390339,0a,75y,181.7h,91.53t/data=!3m4!1e1!3m2!1speh4w0tmb-SoMQQ09MCw0A!2e0
Quote from: TheHighwayMan394 on October 08, 2017, 12:25:28 AM
Quote from: GaryV on October 07, 2017, 04:29:49 PM
There's a configuration like that west of Chelsea, MI on I-94: https://www.google.com/maps/@42.2946212,-84.0859395,1295m/data=!3m1!1e3?hl=en
As far as I know, this highway was devised in that manner; both sides were built at the same time. Old US-12, that the freeway replaced, is about 1/2 mile east of the railroad.
There's another one on I-94 (and 90/39) southeast of Portage, WI. I'm not sure what road is being " undoverpassed there.
Smokey Hollow Road I believe.
https://www.google.com/maps/@43.3774501,-89.4623347,747m/data=!3m1!1e3?hl=en
How could I forget MA 24 at I-495?
Quote from: 1 on June 17, 2018, 08:34:06 AM
How could I forget MA 24 at I-495?
Yeah man, what the F?!? I mean, even I knew about that one. I just didn't post it here. Was waiting on you to...
In downtown Hartford CT, I-84 does this twice. WB 84 goes beneath Asylum Avenue and Broad Street while EB 84 goes above Asylum Avenue and Broad Street.
Quote from: jakeroot on June 17, 2018, 08:27:59 PM
Quote from: 1 on June 17, 2018, 08:34:06 AM
How could I forget MA 24 at I-495?
Yeah man, what the F?!? I mean, even I knew about that one. I just didn't post it here. Was waiting on you to...
This is a classic example of sarcasm being hard to read over the internet.
I can't decipher whether you really knew about it or not. I sure as heck didn't, before this thread.
Quote from: webny99 on June 18, 2018, 03:45:59 PM
Quote from: jakeroot on June 17, 2018, 08:27:59 PM
Quote from: 1 on June 17, 2018, 08:34:06 AM
How could I forget MA 24 at I-495?
Yeah man, what the F?!? I mean, even I knew about that one. I just didn't post it here. Was waiting on you to...
This is a classic example of sarcasm being hard to read over the internet.
I can't decipher whether you really knew about it or not. I sure as heck didn't, before this thread.
I was playing into
1's slightly odd rhetorical question. Obviously I don't know how he forgot, but it's not like it was a glaring omission from this thread.
Quote from: jakeroot on June 18, 2018, 04:24:56 PM
Quote from: webny99 on June 18, 2018, 03:45:59 PM
Quote from: jakeroot on June 17, 2018, 08:27:59 PM
Quote from: 1 on June 17, 2018, 08:34:06 AM
How could I forget MA 24 at I-495?
Yeah man, what the F?!? I mean, even I knew about that one. I just didn't post it here. Was waiting on you to...
This is a classic example of sarcasm being hard to read over the internet.
I can't decipher whether you really knew about it or not. I sure as heck didn't, before this thread.
I was playing into 1's slightly odd rhetorical question. Obviously I don't know how he forgot, but it's not like it was a glaring omission from this thread.
I kind of figured that - I don't know of any of these in my own area, and I haven't googled the above example, so I have no basis to say whether or not I'd expect him to remember it. :-D
I simply find the Kirkwood Highway (DE-2) in the Wilmington area to be the strangest and most annoying road in the entire state: https://goo.gl/maps/MZqXpzq32xC2
Quote from: ipeters61 on June 23, 2018, 05:48:29 PM
I simply find the Kirkwood Highway (DE-2) in the Wilmington area to be the strangest and most annoying road in the entire state: https://goo.gl/maps/MZqXpzq32xC2
There is some interesting geography here (obviously a hilly area), but I think the point of the thread was to point out roads where one direction was above or below the other direction.
Quote from: jakeroot on June 24, 2018, 03:08:38 AM
Quote from: ipeters61 on June 23, 2018, 05:48:29 PM
I simply find the Kirkwood Highway (DE-2) in the Wilmington area to be the strangest and most annoying road in the entire state: https://goo.gl/maps/MZqXpzq32xC2
There is some interesting geography here (obviously a hilly area), but I think the point of the thread was to point out roads where one direction was above or below the other direction.
Right here isn't too hilly. It's just a very busy area with a lot of roads, homes and businesses with a lot of nearby traffic lights. If you back far away on GSV you can see that they depressed this area to have Centerville Rd go under Kirkwood highway. You can access this area fully about 1/4 mile away on regular roads, or go thru a shopping center (Prices Corner) that gives access to both roads.
Quote from: jeffandnicole on June 24, 2018, 08:10:54 AM
Quote from: jakeroot on June 24, 2018, 03:08:38 AM
Quote from: ipeters61 on June 23, 2018, 05:48:29 PM
I simply find the Kirkwood Highway (DE-2) in the Wilmington area to be the strangest and most annoying road in the entire state: https://goo.gl/maps/MZqXpzq32xC2
There is some interesting geography here (obviously a hilly area), but I think the point of the thread was to point out roads where one direction was above or below the other direction.
Right here isn't too hilly. It's just a very busy area with a lot of roads, homes and businesses with a lot of nearby traffic lights. If you back far away on GSV you can see that they depressed this area to have Centerville Rd go under Kirkwood highway. You can access this area fully about 1/4 mile away on regular roads, or go thru a shopping center (Prices Corner) that gives access to both roads.
That makes sense, it seemed like it had to be some forced geographic situation. As far as I know, it's the only section of Kirkwood with an overpass.
I guess if we're on that subject, here's DE-896/US-301/DE-71 just before the Summit Bridge, or as I call it, the little expressway that couldn't: https://goo.gl/maps/iUoMr7r8BXx
Again, it's the only off-grade intersection that I know of on that road and when I was commuting from Newark to Dover, I went through it every day.
I'd say MD-24/MD-924/Tollgate Road in Abingdon, Maryland. People coming from I-95 north have to go through a traffic light at the end of MD-924 before proceeding onto MD-24 north.
The Los Angeles 110 Arroyo Seco Freeway was built using existing tunnels going east, and new bridges going west. This allowed for weird left entrances like this (https://goo.gl/maps/2nFKJcbh1i72) until they were closed off. I had seen this arrangement on a map, and could not picture what it really looked like or why until the internet came along. Later it became cheaper to build bridges instead of tunnels, I guess.
I don't know why I haven't really noticed this before but tonight I noticed that at exit 93 on I-75 which is where US-24 ends the northbound side has an overpass over Dixie Highway and the southbound side has an underpass under Dixie Highway. This interchange has ramps in the median with northbound Dixie to northbound I-75 the traffic merges onto I-75 in the left lane, same for southbound Dixie to southbound I-75.
One more oddity on CA 99: the Buhach Road interchange near Atwater has a NB flyover and LH exit/entrances SB in 99's median. This was the main access to the old Castle AFB, now a local airport and industrial park; the configuration was intended to expedite military convoy movement to and from the base, which was one of the principal B-52 bases for Vietnam-era bombing missions. This fact being well-known at that time, during 1967-71 there were invariably protestors lining the east side of CA 99, mostly on the frontage road. They'd occasionally venture under the NB flyover onto the median, where they would be quickly escorted back by either CHP or Merced County sheriff's deputies (I personally witnessed -- and occasionally photographed -- these interactions during that time as a field reporter for the UC Riverside school newspaper). The Caltrans long-range "master plan" for CA 99 will reconfigure this interchange as a conventional diamond with the through lanes on a berm (the proximity to the UP main line directly adjacent to the freeway dictates a "tight" ramp arrangement).
Quote from: WR of USA on June 18, 2018, 08:22:18 AM
In downtown Hartford CT, I-84 does this twice. WB 84 goes beneath Asylum Avenue and Broad Street while EB 84 goes above Asylum Avenue and Broad Street.
And you also have the I-84/I-91 junction. The northbound lanes of I-91 pass under I-84, while the southbound lanes pass over.
Quote from: sparker on November 04, 2018, 01:50:38 AM
The Caltrans long-range "master plan" for CA 99 will reconfigure this interchange as a conventional diamond with the through lanes on a berm (the proximity to the UP main line directly adjacent to the freeway dictates a "tight" ramp arrangement).
Looks like it's already happened. (https://www.google.com/maps/@37.3341812,-120.5679824,1198m/data=!3m1!1e3)
The first one I could think of not previously mentioned is where the NJ Turnpike crosses Rt. 9 north of Exit 11 for the Garden State Parkway. There, three of the four Turnpike carriageways pass under Rt. 9 while only the SB truck lanes cross over Rt. 9.
Quote from: ErmineNotyours on November 06, 2018, 09:56:56 AM
Quote from: sparker on November 04, 2018, 01:50:38 AM
The Caltrans long-range "master plan" for CA 99 will reconfigure this interchange as a conventional diamond with the through lanes on a berm (the proximity to the UP main line directly adjacent to the freeway dictates a "tight" ramp arrangement).
Looks like it's already happened. (https://www.google.com/maps/@37.3341812,-120.5679824,1198m/data=!3m1!1e3)
Correct. I drove through there in August and that area was Interstate grade.
Here's something that I think qualifies north of Ogden, Utah. It's certainly weird, and I don't think I've ever seen anything else like it.
US 89 and UT 126, Hot Springs Junction (https://www.google.com/maps/@41.3445564,-112.0340655,640m/data=!3m1!1e3)
Southbound US 89 follows its own one-way carriageway through this intersection and is grade separated from 126, but all access between 126 and 89 is handled through a two-way carriageway which carries mainline northbound 89. That meets 126 at grade, with several weird left-turn ramps and merges.
There is a similar setup in Chehalis, WA:
https://www.google.com/maps/@46.6732801,-122.9712597,256m/data=!3m1!1e3?hl=en&authuser=0
We somehow haven't had the northern I-93/US 1 junction in Boston yet (https://www.google.com/maps/@42.3711598,-71.0670353,398m/data=!3m1!1e3). The Storrow ramps and double-deck section to the north add to the confusion.
Quote from: thefraze_1020 on November 07, 2018, 06:11:30 PM
There is a similar setup in Chehalis, WA:
https://www.google.com/maps/@46.6732801,-122.9712597,256m/data=!3m1!1e3?hl=en&authuser=0
Another similar-ish one...BC Hwy 1 @ Lougheed Highway, just northwest of Hope: https://goo.gl/CjX9nJ
Problem with these (and
US 89's US 89 example), is that they technically don't involve divided highways (though both are certainly high-speed arterials).
Quote from: CYoder on October 18, 2017, 04:13:17 PM
Quote from: jakeroot on October 15, 2017, 10:23:01 PM
I wasn't going to post this, but it's in the same vein as many others above me. The 405/518 interchange with the 5 in Tukwila, Washington has a westbound carriageway that goes over the 5, whereas the eastbound carriageway passes beneath the 5. This is simply due to the design of the interchange, with the left-side ramps for various movements, requiring some higher bridges.
I-70 also does this at its interchange with I-77 (https://www.google.com/maps/@39.9986058,-81.5583569,711m/data=!3m1!1e3).
That is to allow the left exit ramp grade to be not so steep.
In New Jersey I-287 does it at I-80. NB Lanes go under I-80 while the SB Lanes go over I-80. That is for the left side merges from I-80. Funny thing is though that I-80 was built after I-287 there. https://goo.gl/maps/4gi3ez6RpPJ2
Garden State Parkway does it in Clifton at NJ 3. The NB Parkway goes over NJ 3 ( and Allwood Road) and the SB Parkway goes under NJ 3 (and Allwood Road). That also is for left exits on the Parkway. https://goo.gl/maps/TA5CwuUTY8N2
Then in Woodbridge the NJ Turnpike does it at US 9. The NB lanes go under it, but the SB inner roadway also goes under it. The SB outer roadway goes over US 9. The southbound outer (truck) lanes use the original 1957 overpass over US 9 also and before the widening in 1972 the SB mainline went over US 9 while the NB mainline went under it. Why as there were no left exits there, so its a mystery to why the NJTA did that seven decades ago. https://goo.gl/maps/mg2y3SX7p9s
The I-390/I-490/NY 390 interchange in Rochester (390 north crosses over 490, 390 south crosses under it): https://www.google.com/maps/@43.1573532,-77.6800112,709m/data=!3m1!1e3
I-39/90/94 goes under and over Smokey Hollow Rd in Poynette. Probably due to the hilly topography. https://www.google.com/maps/@43.3784365,-89.4619786,967m/data=!3m1!1e3 (https://www.google.com/maps/@43.3784365,-89.4619786,967m/data=!3m1!1e3)
Quote from: jp the roadgeek on November 04, 2018, 03:54:53 AM
Quote from: WR of USA on June 18, 2018, 08:22:18 AM
In downtown Hartford CT, I-84 does this twice. WB 84 goes beneath Asylum Avenue and Broad Street while EB 84 goes above Asylum Avenue and Broad Street.
And you also have the I-84/I-91 junction. The northbound lanes of I-91 pass under I-84, while the southbound lanes pass over.
As it turns out, I actually have a nice photo of this, taken from the Founders Bridge, when I went to CT at the beginning of this month (I-91 is the foreground, I'm facing northbound; I-84 is where the FedEx truck is, I believe):
(https://i.ibb.co/DMQyvHX/IMG-6085.jpg) (https://ibb.co/t2DtvTf)
Yes with the Fed-Ex truck for I-84/US Route 6. The bluish bridge along the top is the flyover ramp from I-84/US 6 East to I-91 North. It opened in the fall of 1990.
Quote from: ErmineNotyours on July 15, 2018, 11:06:20 PM
The Los Angeles 110 Arroyo Seco Freeway was built using existing tunnels going east, and new bridges going west. This allowed for weird left entrances like this (https://goo.gl/maps/2nFKJcbh1i72) until they were closed off. I had seen this arrangement on a map, and could not picture what it really looked like or why until the internet came along. Later it became cheaper to build bridges instead of tunnels, I guess.
A similar setup was proposed in the late 90's at US 60 and AZ 79 in Arizona to reduce accidents; elevate the eastbound lanes of US 60 over 79, then let 79 terminate at grade at Westbound US 60. Ultimately ADOT went with a reroute and a full diamond interchange, then slimmed down the old US 60 alignment and turned it into a local street.
https://goo.gl/maps/3oxRTGDJBJeKsNCx8
Quote from: ipeters61 on June 29, 2019, 10:17:30 PM
Quote from: jp the roadgeek on November 04, 2018, 03:54:53 AM
Quote from: WR of USA on June 18, 2018, 08:22:18 AM
In downtown Hartford CT, I-84 does this twice. WB 84 goes beneath Asylum Avenue and Broad Street while EB 84 goes above Asylum Avenue and Broad Street.
And you also have the I-84/I-91 junction. The northbound lanes of I-91 pass under I-84, while the southbound lanes pass over.
As it turns out, I actually have a nice photo of this, taken from the Founders Bridge, when I went to CT at the beginning of this month (I-91 is the foreground, I'm facing northbound; I-84 is where the FedEx truck is, I believe):
(https://i.ibb.co/DMQyvHX/IMG-6085.jpg) (https://ibb.co/t2DtvTf)
Interesting, looks like it was done this way due to design/space considerations. In Arizona, Bumble Bee Road crosses over Southbound I-17 and then under Northbound I-17 in some pretty rugged terrain:
https://goo.gl/maps/Rqxbwzo5p1CaqiaG8
Further south, in Phoenix, ADOT provided a direct connection between I-10 and SR 51 by squeezing both directions of carpool lanes next to the Westbound 10 - Northbound 51 ramp, then running those carpool lanes parallel to Westbound I-10 for about a half mile before braiding over the westbound lanes back into the median. Considering the pre-existing construction, there really was no other feasible alternative:
https://goo.gl/maps/99Tp8rc7PkzJRiyp8
Quote from: ipeters61 on June 29, 2019, 10:17:30 PM
Quote from: jp the roadgeek on November 04, 2018, 03:54:53 AM
Quote from: WR of USA on June 18, 2018, 08:22:18 AM
In downtown Hartford CT, I-84 does this twice. WB 84 goes beneath Asylum Avenue and Broad Street while EB 84 goes above Asylum Avenue and Broad Street.
And you also have the I-84/I-91 junction. The northbound lanes of I-91 pass under I-84, while the southbound lanes pass over.
As it turns out, I actually have a nice photo of this, taken from the Founders Bridge, when I went to CT at the beginning of this month (I-91 is the foreground, I'm facing northbound; I-84 is where the FedEx truck is, I believe):
Another place where (the other) I-84 has something like this is exit 224, near the top of Cabbage Hill in Oregon.
(https://i.imgur.com/hUe1AE3.png)
On I-89, from north to south,...
1) At I-189 (exit 13), in South Burlington, VT. https://goo.gl/maps/ALzsvhufwtrf8Mrr8 (https://goo.gl/maps/ALzsvhufwtrf8Mrr8)
2) At Crossover Rd., in Brookfield, VT. https://goo.gl/maps/nqCcdz5gFtmY83ZT7 (https://goo.gl/maps/nqCcdz5gFtmY83ZT7)
3) At County Rd., in New London, NH. https://goo.gl/maps/kMp1EvYXmS92ofqE8 (https://goo.gl/maps/kMp1EvYXmS92ofqE8)
Quote from: US 81 on October 15, 2017, 08:07:50 AM
Quote from: Brian556 on October 08, 2017, 12:59:25 AM
I-35 at Cesar Chavez St in Austin Tx:
https://www.google.com/maps/@30.2616588,-97.7363717,3a,75y,173.73h,81.95t/data=!3m7!1e1!3m5!1sy6PJ-E0XPuDDwboB8TftoQ!2e0!6s%2F%2Fgeo3.ggpht.com%2Fcbk%3Fpanoid%3Dy6PJ-E0XPuDDwboB8TftoQ%26output%3Dthumbnail%26cb_client%3Dmaps_sv.tactile.gps%26thumb%3D2%26w%3D203%26h%3D100%26yaw%3D15.871571%26pitch%3D0%26thumbfov%3D100!7i13312!8i6656?hl=en-US (https://www.google.com/maps/@30.2616588,-97.7363717,3a,75y,173.73h,81.95t/data=!3m7!1e1!3m5!1sy6PJ-E0XPuDDwboB8TftoQ!2e0!6s%2F%2Fgeo3.ggpht.com%2Fcbk%3Fpanoid%3Dy6PJ-E0XPuDDwboB8TftoQ%26output%3Dthumbnail%26cb_client%3Dmaps_sv.tactile.gps%26thumb%3D2%26w%3D203%26h%3D100%26yaw%3D15.871571%26pitch%3D0%26thumbfov%3D100!7i13312!8i6656?hl=en-US)
I came here to cite this one. The architecture looks (to my amateur eyes) to date from the 1950's and the original construction of I-35. Were the southbound lanes the original path of US 81 and/or East Ave, does anyone know?
This question is old, but I find it intriguing. It seems familiar; I think I've looked at it before, but I don't remember drawing a conclusion. I'm pretty sure I can say that the previous path of US 81 was along the southbound lanes. Click the link below and go to page 4. It shows the survey, dated 1958 (note that these dates are not always accurate, but this document does give the date on the last page). It doesn't show the new or proposed right-of-way, but it does show existing East Ave. and the centerline for the proposed construction. On the right edge of the page it shows where Brushy St. intersects 1st. Based on the lot lengths given I estimate it's approximately 230 feet from the edge of Brushy to the centerline. Google Earth tells me that's just about in the middle of where the freeway is now. East Ave. is clearly shown just west of that centerline.
https://maps.dot.state.tx.us/ROW_PDF/AUS001513AR.pdf (https://maps.dot.state.tx.us/ROW_PDF/AUS001513AR.pdf)
The Real Property Asset Map answers a lot of questions about old alignments.
https://www.txdot.gov/inside-txdot/division/right-of-way/delineation-system.html (https://www.txdot.gov/inside-txdot/division/right-of-way/delineation-system.html)
TCH/Yellowhead/AB16 at the intersection with AB47. The westbound lanes are the original highway surveyed in 1960 and the intersection was at grade. The eastbound lanes were surveyed in 1985, twinning the highway, hence the overpass.
https://www.google.ca/maps/@53.5688743,-116.579929,588m/data=!3m1!1e3?hl=en (https://www.google.ca/maps/@53.5688743,-116.579929,588m/data=!3m1!1e3?hl=en)
Quote from: Terry on November 24, 2019, 05:43:41 PM
TCH/Yellowhead/AB16 at the intersection with AB47. The westbound lanes are the original highway surveyed in 1960 and the intersection was at grade. The eastbound lanes were surveyed in 1985, twinning the highway, hence the overpass.
https://www.google.ca/maps/@53.5688743,-116.579929,588m/data=!3m1!1e3?hl=en (https://www.google.ca/maps/@53.5688743,-116.579929,588m/data=!3m1!1e3?hl=en)
I remember that stretch of highway quite well, last time I drove it (starting in Vancouver, heading to Edmonton). Really an unusual stretch. For a few moments, I was thinking "finally, a proper freeway", and then you'd get right back to at-grade intersections. Then you'd get something like this, where they decided to do both at one interchange. Really unlike anything I've experienced regularly in BC or WA (both places have very few divided highways like those in Alberta).
Quote from: jakeroot on November 24, 2019, 06:34:28 PM
Quote from: Terry on November 24, 2019, 05:43:41 PM
TCH/Yellowhead/AB16 at the intersection with AB47. The westbound lanes are the original highway surveyed in 1960 and the intersection was at grade. The eastbound lanes were surveyed in 1985, twinning the highway, hence the overpass.
https://www.google.ca/maps/@53.5688743,-116.579929,588m/data=!3m1!1e3?hl=en (https://www.google.ca/maps/@53.5688743,-116.579929,588m/data=!3m1!1e3?hl=en)
I remember that stretch of highway quite well, last time I drove it (starting in Vancouver, heading to Edmonton). Really an unusual stretch. For a few moments, I was thinking "finally, a proper freeway", and then you'd get right back to at-grade intersections. Then you'd get something like this, where they decided to do both at one interchange. Really unlike anything I've experienced regularly in BC or WA (both places have very few divided highways like those in Alberta).
The reason would probably be the UFA truck stop, and other businesses and houses, north of the WB lanes. The existing exit is just for a service road, which would make things difficult to have both highway traffic and slow moving vehicles if it were a highway exit. I don't know if the traffic count would warrant an underpass there.