Get off I-405 onto Culver Dr. toward UCI (Irvine, CA). You will cross University Dr. soon. Continue straight for several miles. You will eventually be on University Dr. crossing Culver Dr. at the same intersection you saw before.
Any other roads that cross themselves unintentionally?
How can a street intersect with itself? It must be the nexus of the universe!
QC 132
Anywhere you have Wrong Way One Way Pairs, including DDIs, this occurs
But for a non-DDI, IL 92 in Springfield. I-5 near Castaic Lake in California. I-85 near the Davidson County Rest Area in North Carolina
I will say these are intentional crossings of one's self...I now see the OP is looking for "unintentional"
The OP's example involves a loop, albeit a loop with several road names. SB on Culver after crossing University, it becomes Bonita Canyon going SSW, then Ford going W, East Bluff going N and NE, which then becomes University going NE and E to the same intersection with Culver.
This is probably a situation repeated in many subdivisions around the country, as roads bend and twist and loop.
This is a great example from my home county, Harford County, Maryland. It actually starts across the Mason-Dixon Line in York County, Pennsylvania.
Start out on PA-851 in the borough of Fawn Grove, Pennsylvania in York County. Turn right (going east on PA-851 out of Fawn Grove) or left (going west, entering the borough) onto Rocks Road. At at least one of those approaches, the westbound one, there is a sign stating “Bel Air, MD 17 (miles)”.
Follow Rocks Road a short distance south into Maryland, where it picks up the designation of MD-24. Continue south for several miles, during which time you will encounter a roundabout with MD-165, parallel Deer Creek through Rocks State Park, and pass through the retail and residential developments of Forest Hill. You will ultimately reach an interchange with U.S. 1, the Bel Air Bypass. MD-24 south branches off onto the first ramp to join U.S. 1 south. Instead of taking this ramp, keep going straight. This will put you onto MD-924, part of MD-24 until 1987. You will go past a traffic light whose cross roads are Vale Road and Moores Mill Road, straight through downtown Bel Air, and continue for a couple of miles into Abingdon. MD-924 curves to the right and ends at a diamond interchange with MD-24 seven and a half miles after it started at the Bel Air Bypass.
After going under the MD-24 bridge, you are now on Tollgate Road. Tollgate Road almost immediately curves to the right itself, meaning you have now made a U-turn and are headed back north toward Bel Air. MD-924 and Tollgate Road both parallel MD-24 between Bel Air and Abingdon, so where you were paralleling MD-24 to the east before, you are now paralleling it to the west. So Tollgate Road goes back up through the developments making up the west side of Abingdon. At the Wheel Road roundabout you transition back into Bel Air. When you get just past Bel Air South Parkway, you have reached a link crucial to this journey: the road from here to the Plumtree Road roundabout was not completed until June 2017; before that, there was a gap in the road at this point.
Continue past the Plumtree roundabout for a few more miles. You will pass the Upper Chesapeake hospital, three more roundabouts, the Harford Mall, underneath the Bel Air Bypass, and past the Harford County Equestrian Center, before finally reaching a pair of 90-degree turns just past Red Pump Road (which goes back to MD-24 at the last signal north of the Bypass interchange). The first turn is to the left, and the second is to the right; after the second turn, Tollgate Road’s name changes to Vale Road, which soon starts paralleling Winters Run. This whole time, you are still in the Bel Air ZIP code area. Eventually, Vale Road intersects Red Pump Road again, crosses over the Bel Air Bypass, and then comes the moment you’ve been waiting for: you reach MD-924 again, at the light you found yourself at earlier. Proceed straight onto Moores Mill Road and go east for a couple of miles before coming to MD-22 on the east side of Bel Air. To complete the trip, go straight at the light and go a short distance to the roundabout at the entrance to the Greenbrier Shopping Center.
This happens a lot in suburban communities.
* US-441 in Great Smoky Mountains National Park
* US 16A in Custer State Park (x3!)
* SD-87 in Custer State Park (there might be more in Custer that I'm forgetting about)
* Cedar Ln in Florence, NJ (the only one in NJ, I think)
I'm assuming you're excluding interchanges? Because literally every route that changes directions in a cloverleaf interchange qualifies.
I-70 at the infamous Breezewood, PA exit?
Quote from: Paulinator66 on January 02, 2020, 02:32:55 PM
I-70 at the infamous Breezewood, PA exit?
Oh yes, we can't forget THAT one.
NJ-495, of course.... :-D
Quote from: DJ Particle on January 03, 2020, 01:56:24 AM
NJ-495, of course.... :-D
Why you little monster you beat me to it :banghead:
I-77 Charlotte
US 6 Eastbound in North Windham, CT at the end of the Willimantic bypass. EB traffic loops under EB US 6/WB SR 649 and you end up on the overpass of where you just came from.
Hideaway Ln in Hunt County TX intersects itself and Hideaway Rd in a T-intersection: https://www.google.com/maps/@32.9556019,-96.0457336,16.5z
Quote from: jp the roadgeek on January 05, 2020, 01:15:12 AM
US 6 Eastbound in North Windham, CT at the end of the Willimantic bypass. EB traffic loops under EB US 6/WB SR 649 and you end up on the overpass of where you just came from.
Not sure if that counts, because then any interchange that does that would count, like US-6 westbound north of the Sagamore Bridge
Physically, I-76 where it bumps with I-80 in Ohio.
And since people have started posting places where roads loop over themselves, I know of 5 such loops in Spain (one of them is barely, a few feet away it would have been in France instead). And there are at least 5 expressway loops in China.
Is it cheating to count this? It crosses over itself, though there isn't an intersection.
(https://live.staticflickr.com/65535/49393668136_1e3fa7d691_c.jpg) (https://flic.kr/p/2ifKsFS)Pigtails (https://flic.kr/p/2ifKsFS) by Tom Heline (https://www.flickr.com/photos/185842086@N05/), on Flickr
Quote from: theline on January 16, 2020, 05:52:28 AM
Is it cheating to count this? It crosses over itself, though there isn't an intersection.
(https://live.staticflickr.com/65535/49393668136_1e3fa7d691_c.jpg) (https://flic.kr/p/2ifKsFS)Pigtails (https://flic.kr/p/2ifKsFS) by Tom Heline (https://www.flickr.com/photos/185842086@N05/), on Flickr
I already posted this but thx for the image.
Here's a long and convoluted one near where I live.
Begin in Roseland at the intersection between Eagle Rock Ave (Essex CR 611) and Livingston Ave (CR 527), just north of Livingston and I-280. From there, head south on Livingston Ave (CR 527), through the I-280 interchange. As Livingston Ave enters the namesake township, it gains the N prefix, and then the S prefix as it crosses Mt. Pleasant Ave (NJ 10), which gains the prefix W or E itself depending on which side of N or S Livingston Ave it is on. At E Cedar St, CR 527 will depart from S Livingston Ave at a left turn, but keep following S Livingston Ave, which is now Essex CR 649. After W or E Hobart Gap Rd (Essex CR 608), Essex CR 649 gets a cool Jersey barrier and becomes John F. Kennedy Pkwy. It even gets a diamond interchange with Parsonage Hill Rd (Essex CR 606); pretty cool, huh?
At NJ 24, which also happens to be the Union-Essex county border, John F. Kennedy Pkwy changes its name to River Rd, but the number still stays across the county line as Union CR 649. Union CR 649 branches off to the left as Passaic Ave (this is where our journey will end, eventually), but River Rd continues straight across the Passaic River, and then the Morris-Union county border, without a number.
Keep going straight until the traffic light at Watchung Ave, where we unfortunately run into a small problem. Watchung Ave, continued by its successor Shunpike Rd, ends at Loantaka Way (Morris CR 636) near Madison. Here, we have to bend the rules a little, and our journey would have come to an end here, if it weren't for the fact that the road on the left is River Rd. After gaining the Morris CR 647 designation from Southern Blvd, River Rd continues until we arrive at the same situation at Passaic St, on which Morris CR 647 continues south. Thankfully, the River Rd name saves the day again, and thus we can continue. At the Long Hill-Chatham township line, River Rd becomes Long Hill Rd, and later gains the Morris CR 657 designation. Everything is fine until we reach a five-way intersection at Millington, where Long Hill Rd makes a turn to the southwest, continuing as a suburban road and then terminating prematurely. However, it is the county route number this time that lets us continue. Morris CR 657 leaves Long Hill Rd and continues northwest as Basking Ridge Rd, all the way to the Somerset-Morris county line.
Once in Somerset County, the road is named S Maple Ave and retains its previous number as Somerset CR 657. Passing through downtown Basking Ridge, it loses its county route status, and its prefix changes to N. After passing across I-287 at an interchange and reaching US 202, it changes its name to Childs Rd and gains the Somerset CR 613 designation. Before long, however, the road loops back down south to US 202 and under I-287 again, becoming N Finley Ave and then S Finley Ave once passing through downtown Basking Ridge once more. From there, the road becomes Lyons Rd and Somerset CR 640. At Liberty Corner, the westernmost point of our journey, Somerset CR 640 ends, we "merge" onto CR 512, and the road name changes to Valley Rd.
Valley Rd runs well past the Somerset-Morris county line (though not without having to make two bends in the rules), and then all the way up to the Morris-Union county line, Springfield Ave succeeding it. Everything works fine until east of New Providence, near the railroad overpass. Instead of remaining on CR 512 and Springfield Ave, which both end in eastern Summit, here we have to make one last bend in the rules. This time, it is the general shape of the road that dictates how we proceed rather than the name or the number. In order to complete our giant loop, we now have to keep left on Constantine Pl (Union CR 649; sounds familiar?). Constantine Pl T-intersects with Passaic Ave, which is thankfully also Union CR 649. Finally, Passaic Ave T-intersects with River Rd.
41.4 miles. 1 hour and 24 minutes. Epzik8's loop is only 31.0 miles and takes 1 hour. Can anyone beat this using only local and county roads?
Google Maps directions of the route described: https://www.google.com/maps/dir/40.8209004,-74.2965635/40.7288084,-74.3787357/@40.7286305,-74.3807678,17z/data=!4m34!4m33!1m30!3m4!1m2!1d-74.4873548!2d40.6814918!3s0x89c3bb6468860cb1:0x8c4b43836b452eb9!3m4!1m2!1d-74.5530269!2d40.7278578!3s0x89c3a2d8d5dfd601:0x54f5d864108db4f4!3m4!1m2!1d-74.5547574!2d40.6805003!3s0x89c3bd069ed9aaf1:0xef458e8b0f34c721!3m4!1m2!1d-74.5784006!2d40.6659665!3s0x89c3bd90518cc943:0x5816c74561759656!3m4!1m2!1d-74.4277779!2d40.6927188!3s0x89c3bab623329401:0xe464f3653520f2fd!3m4!1m2!1d-74.3861792!2d40.7137614!3s0x89c3af94e45b571d:0xf9bacadff103c5eb!1m0!3e0
Quote from: TheGrassGuy on January 16, 2020, 09:56:14 AM
Quote from: theline on January 16, 2020, 05:52:28 AM
Is it cheating to count this? It crosses over itself, though there isn't an intersection.
I already posted this but thx for the image.
Ha, I was just about to reply and say "there's something similar in South Dakota near Mount Rushmore".
I decided to look it up, only to find out, of course, that this is it. :pan:
For some unknown reason, I had 19A in my mind as the route number. We've got it covered, in any case!
If a road crosses itself does that mean it's a catholic road? :-D
Quote from: Terry Shea on January 23, 2020, 05:21:05 PM
If a road crosses itself does that mean it's a catholic road? :-D
Depends which direction. (https://www.catholiceducation.org/en/culture/catholic-contributions/the-sign-of-the-cross.html)
I suppose I'll give it a try. The road technically doesn't cross itself per se, but it loops back and ends at itself. I'm also going by continuous stretch of roadway, not necessarily by designation.
Start on VA-1104 Valley Ridge Road, at its eastern endpoint near Low Moor, VA, going westbound.
After 3.6 miles, continue straight onto U.S. Route 220; continue on U.S. Route 220 northwards for 108 miles to Petersburg, WV.
At Petersburg, WV, proceed straight onto WV-22, and continue for 33 miles to Seneca Rocks, WV.
At Seneca Rocks, continue straight onto U.S. Route 33 for 13 miles. You will arrive back at U.S. 220 in Franklin, WV, where the roadway finally ends.
Loop length: 74 miles.
Total roadway length: 157 miles.
https://www.google.com/maps/dir/37.7829577,-79.9081357/38.6553032,-79.3325167/@38.6493669,-79.3766881,11.08z/am=t/data=!4m14!4m13!1m10!3m4!1m2!1d-79.3395835!2d38.6309486!3s0x89b4cd017d76df17:0xc1538ed99af54e4c!3m4!1m2!1d-79.2249888!2d38.9875153!3s0x89b5302022c15649:0x96e257b36e3c68c8!1m0!3e0
Quote from: TheGrassGuy on January 19, 2020, 12:22:14 PM
Here's a long and convoluted one near where I live.
Begin in Roseland at the intersection between Eagle Rock Ave (Essex CR 611) and Livingston Ave (CR 527), just north of Livingston and I-280. From there, head south on Livingston Ave (CR 527), through the I-280 interchange. As Livingston Ave enters the namesake township, it gains the N prefix, and then the S prefix as it crosses Mt. Pleasant Ave (NJ 10), which gains the prefix W or E itself depending on which side of N or S Livingston Ave it is on. At E Cedar St, CR 527 will depart from S Livingston Ave at a left turn, but keep following S Livingston Ave, which is now Essex CR 649. After W or E Hobart Gap Rd (Essex CR 608), Essex CR 649 gets a cool Jersey barrier and becomes John F. Kennedy Pkwy. It even gets a diamond interchange with Parsonage Hill Rd (Essex CR 606); pretty cool, huh?
At NJ 24, which also happens to be the Union-Essex county border, John F. Kennedy Pkwy changes its name to River Rd, but the number still stays across the county line as Union CR 649. Union CR 649 branches off to the left as Passaic Ave (this is where our journey will end, eventually), but River Rd continues straight across the Passaic River, and then the Morris-Union county border, without a number.
Keep going straight until the traffic light at Watchung Ave, where we unfortunately run into a small problem. Watchung Ave, continued by its successor Shunpike Rd, ends at Loantaka Way (Morris CR 636) near Madison. Here, we have to bend the rules a little, and our journey would have come to an end here, if it weren't for the fact that the road on the left is River Rd. After gaining the Morris CR 647 designation from Southern Blvd, River Rd continues until we arrive at the same situation at Passaic St, on which Morris CR 647 continues south. Thankfully, the River Rd name saves the day again, and thus we can continue. At the Long Hill-Chatham township line, River Rd becomes Long Hill Rd, and later gains the Morris CR 657 designation. Everything is fine until we reach a five-way intersection at Millington, where Long Hill Rd makes a turn to the southwest, continuing as a suburban road and then terminating prematurely. However, it is the county route number this time that lets us continue. Morris CR 657 leaves Long Hill Rd and continues northwest as Basking Ridge Rd, all the way to the Somerset-Morris county line.
Once in Somerset County, the road is named S Maple Ave and retains its previous number as Somerset CR 657. Passing through downtown Basking Ridge, it loses its county route status, and its prefix changes to N. After passing across I-287 at an interchange and reaching US 202, it changes its name to Childs Rd and gains the Somerset CR 613 designation. Before long, however, the road loops back down south to US 202 and under I-287 again, becoming N Finley Ave and then S Finley Ave once passing through downtown Basking Ridge once more. From there, the road becomes Lyons Rd and Somerset CR 640. At Liberty Corner, the westernmost point of our journey, Somerset CR 640 ends, we "merge" onto CR 512, and the road name changes to Valley Rd.
Valley Rd runs well past the Somerset-Morris county line (though not without having to make two bends in the rules), and then all the way up to the Morris-Union county line, Springfield Ave succeeding it. Everything works fine until east of New Providence, near the railroad overpass. Instead of remaining on CR 512 and Springfield Ave, which both end in eastern Summit, here we have to make one last bend in the rules. This time, it is the general shape of the road that dictates how we proceed rather than the name or the number. In order to complete our giant loop, we now have to keep left on Constantine Pl (Union CR 649; sounds familiar?). Constantine Pl T-intersects with Passaic Ave, which is thankfully also Union CR 649. Finally, Passaic Ave T-intersects with River Rd.
41.4 miles. 1 hour and 24 minutes. Epzik8's loop is only 31.0 miles and takes 1 hour. Can anyone beat this using only local and county roads?
Google Maps directions of the route described: https://www.google.com/maps/dir/40.8209004,-74.2965635/40.7288084,-74.3787357/@40.7286305,-74.3807678,17z/data=!4m34!4m33!1m30!3m4!1m2!1d-74.4873548!2d40.6814918!3s0x89c3bb6468860cb1:0x8c4b43836b452eb9!3m4!1m2!1d-74.5530269!2d40.7278578!3s0x89c3a2d8d5dfd601:0x54f5d864108db4f4!3m4!1m2!1d-74.5547574!2d40.6805003!3s0x89c3bd069ed9aaf1:0xef458e8b0f34c721!3m4!1m2!1d-74.5784006!2d40.6659665!3s0x89c3bd90518cc943:0x5816c74561759656!3m4!1m2!1d-74.4277779!2d40.6927188!3s0x89c3bab623329401:0xe464f3653520f2fd!3m4!1m2!1d-74.3861792!2d40.7137614!3s0x89c3af94e45b571d:0xf9bacadff103c5eb!1m0!3e0
I found another really long continuous route without turns, but it sadly doesn't cross itself. https://www.google.com/maps/dir/40.1585118,-74.6436303/40.5361108,-74.5075127/@40.4026485,-74.8143518,11.31z/data=!4m24!4m23!1m20!3m4!1m2!1d-74.7396249!2d40.2026517!3s0x89c1599f361eb925:0x760ceb310e99a34d!3m4!1m2!1d-74.7643119!2d40.2218018!3s0x89c159cebd225045:0xdbc2f544c1dd4498!3m4!1m2!1d-74.8666399!2d40.4315725!3s0x89c3fa04c8216961:0xab331d6778586864!3m4!1m2!1d-74.8297912!2d40.4609456!3s0x89c3f0f66168473f:0x248ff568387c7b45!1m0!3e0!5m1!1e1
Frontage lanes of the freeway at Tokyo's Rainbow Bridge (https://www.google.com/maps/@35.6377188,139.7566512,16.81z)
Similar spiral ramp as above at Shanghai's Nanpu Bridge (https://maps.baidu.com/@13526520.141506612,3638007.690851887,17.68z/maptype%3DB_EARTH_MAP)
Couple of turnpike double trumpet examples:
- I-70 at New Stanton
- I-76 at I-80. I-80 takes the direct ramp off, so it doesn't cross itself.
Two examples from WA:
SR 100 loops around and terminates at itself, about one block from its actual terminus with US 101 in Ilwaco.
SR 504 has this interchange (https://www.google.com/maps/@46.299926,-122.2680274,758m/data=!3m1!1e3) with itself at the Mt. St. Helens Science and Learning Center, which requires westbound traffic to cross over itself.
Can't believe this one hasn't been mentioned: the Raleigh Beltline.
https://www.google.com/maps/@32.6665437,-114.310141,16z
I-8 in Arizona
Quote from: Roadgeekteen on May 13, 2021, 10:27:49 PM
https://www.google.com/maps/@32.6665437,-114.310141,16z
I-8 in Arizona
If we're doing one direction crossing the other now as well, here's US 131 in Grand Rapids (https://www.google.com/maps/@42.972452,-85.6798008,1019m/data=!3m1!1e3)
Quote from: SkyPesos on May 13, 2021, 06:59:15 PM
- I-76 at I-80. I-80 takes the direct ramp off, so it doesn't cross itself.
Sorry to say, but I already mentioned that over a year ago.
Quote from: CNGL-Leudimin on January 06, 2020, 05:43:12 AM
Physically, I-76 where it bumps with I-80 in Ohio.
Also, I'm surprised nobody has mentioned Breezewood yet
Quote from: CNGL-Leudimin on May 14, 2021, 06:03:38 AM
Quote from: SkyPesos on May 13, 2021, 06:59:15 PM
- I-76 at I-80. I-80 takes the direct ramp off, so it doesn't cross itself.
Sorry to say, but I already mentioned that over a year ago.
Quote from: CNGL-Leudimin on January 06, 2020, 05:43:12 AM
Physically, I-76 where it bumps with I-80 in Ohio.
Also, I'm surprised nobody has mentioned Breezewood yet
Sorry to say,, but it was already mentioned over a year ago.
https://www.aaroads.com/forum/index.php?topic=26187.msg2467640#msg2467640
I-55 Northbound into Arkansas, AKA Crump Interchange.
An example from the St. Louis area.
I-255 heads south from its interchange with I-270 near Wood River, IL. It goes south through Metro East before crossing into Missouri - and shortly thereafter, it becomes I-270 at I-55.
I-270 goes north along the Missouri side and turns east in Hazelwood, eventually crossing the river back into Illinois - where it soon encounters the I-255 interchange again, after a 70-mile loop. I-270, of course, continues east and becomes I-70 once it reaches I-55 near Troy. And as for I-255, northbound it becomes IL 255 and eventually US 67, which continues north as a four-lane as far north as Jacksonville.
So, in other words, if you wanted to make a huge loop through the St. Louis metro, you could technically get onto US 67 southbound from I-72 and get to the interchange where I-70 meets I-57 just south of Effingham - all while remaining on the same roadway.
US 1 in Boston does it since the Big Dig ended. It loops around and then does a counterclockwise loop to pass under itself on I-93. Going SB it does a typical clockwise loop, which is mostly common at some interchanges already.
Usually when I see this done, the road changes names to keep an intersection of the same road from happening, but here (https://goo.gl/maps/BEwWzTU7pCXj2GmD6) is an example of the road not changing names when it loops back around.
If grade-separated examples count, US 63 crosses itself (https://www.google.com/maps/@44.5680009,-92.5303696,206m/data=!3m1!1e3) in Red Wing, MN. :D
Palm Canyon Drive in Palm Springs has an interesting alignment. It technically intersects itself but doesn't cross. (https://www.google.com/maps/@33.8023091,-116.545181,308m/data=!3m1!1e3?hl=en) South Palm Canyon continues along a curve and becomes East Palm Canyon while South Palm Canyon itself continues south to Indian Canyon. There is also a tiny street called West Palm Canyon just south of the South Palm Canyon/East Palm Canyon intersection which continues west from the beginning of the East Palm Canyon curve along with a North Palm Canyon on the north side of Palm Springs to complete the cardinal directions.
Quote from: webny99 on October 06, 2022, 06:35:49 PM
If grade-separated examples count, US 63 crosses itself (https://www.google.com/maps/@44.5680009,-92.5303696,206m/data=!3m1!1e3) in Red Wing, MN. :D
Am I missing something? I don't think that's the case anymore with the realigned bridge flipping the curve to intersect US 61 on the northeast edge of downtown rather than connecting to 61 via MN 58 like it did with the old bridge.
Quote from: TheHighwayMan394 on October 07, 2022, 06:05:44 PM
Quote from: webny99 on October 06, 2022, 06:35:49 PM
If grade-separated examples count, US 63 crosses itself (https://www.google.com/maps/@44.5680009,-92.5303696,206m/data=!3m1!1e3) in Red Wing, MN. :D
Am I missing something? I don't think that's the case anymore with the realigned bridge flipping the curve to intersect US 61 on the northeast edge of downtown rather than connecting to 61 via MN 58 like it did with the old bridge.
Sorry, my bad. I forgot that the overlap with US 61 goes south, not back under the bridge.
Quote from: Bruce on May 13, 2021, 07:49:08 PMSR 504 has this interchange (https://www.google.com/maps/@46.299926,-122.2680274,758m/data=!3m1!1e3) with itself at the Mt. St. Helens Science and Learning Center, which requires westbound traffic to cross over itself.
Having been to Johnston Ridge Observatory twice, I've noticed that one as well. I don't know why they designed that part so strange, as there are two ways to "enter" and "exit" eastbound and westbound there. Almost seems like one of the ways both ways would be a spur, similar to the existing spur of US Route 97, better known as the Orondo Spur. However, a spur route for that highway already exists farther west from there.
US 278 does in Atlanta. Where it changes alignment from College Avenue to East Lake Drive it crosses itself due to a rail line paralleling College Ave.
Very small example: CA-1 when transitioning from Sepulveda Boulevard to Lincoln Boulevard. The northbound lanes cross the southbound lanes, due to the way the intersection is designed. If the signal is red, you are stopped at the opposing lanes of the same street.
Quote from: Quillz on October 08, 2022, 07:23:09 PM
Very small example: CA-1 when transitioning from Sepulveda Boulevard to Lincoln Boulevard. The northbound lanes cross the southbound lanes, due to the way the intersection is designed. If the signal is red, you are stopped at the opposing lanes of the same street.
Isn't that the case at every DDI?
Quote from: Quillz on October 08, 2022, 07:23:09 PM
Very small example: CA-1 when transitioning from Sepulveda Boulevard to Lincoln Boulevard. The northbound lanes cross the southbound lanes, due to the way the intersection is designed. If the signal is red, you are stopped at the opposing lanes of the same street.
How?
https://www.google.com/maps/@33.9515805,-118.3964724,18.83z
Quote from: webny99 on October 07, 2022, 07:03:34 PM
Quote from: TheHighwayMan394 on October 07, 2022, 06:05:44 PM
Quote from: webny99 on October 06, 2022, 06:35:49 PM
If grade-separated examples count, US 63 crosses itself (https://www.google.com/maps/@44.5680009,-92.5303696,206m/data=!3m1!1e3) in Red Wing, MN. :D
Am I missing something? I don't think that's the case anymore with the realigned bridge flipping the curve to intersect US 61 on the northeast edge of downtown rather than connecting to 61 via MN 58 like it did with the old bridge.
Sorry, my bad. I forgot that the overlap with US 61 goes south, not back under the bridge.
Better example would be US 101 at US 30 in Astoria.
Bonus points for not only crossing over itself, 101 then also crosses over 30 east of the intersection with 30, a double crossing of Marine Dr.
(https://live.staticflickr.com/65535/51342650429_0ae1f04a8b_k.jpg%3Cbr%20/%3EHere%20is%20that%20point%20101%20crosses%20itself.)https://live.staticflickr.com/65535/51342650429_0ae1f04a8b_k.jpg
Here is the place your talking about.
US 101 is above and below the crossing here.
In the distance is 101 over US 30 too.
Quote from: webny99 on October 06, 2022, 06:35:49 PM
If grade-separated examples count, US 63 crosses itself (https://www.google.com/maps/@44.5680009,-92.5303696,206m/data=!3m1!1e3) in Red Wing, MN. :D
Can't the same be said about any highway that transitions freeways through a cloverleaf? See I-55 in Menphis.
Quote from: ethanhopkin14 on October 11, 2022, 03:07:54 PM
Quote from: webny99 on October 06, 2022, 06:35:49 PM
If grade-separated examples count, US 63 crosses itself (https://www.google.com/maps/@44.5680009,-92.5303696,206m/data=!3m1!1e3) in Red Wing, MN. :D
Can't the same be said about any highway that transitions freeways through a cloverleaf? See I-55 in Menphis.
Yes, but for one direction only. This one was both directions prior to the redesign (and now it doesn't qualify at all).
Quote from: Max Rockatansky on January 01, 2020, 01:51:54 PM
How can a street intersect with itself? It must be the nexus of the universe!
Fairly easily, such as where Colesbury Place intersects itself in Fairfax, Virginia (https://maps.app.goo.gl/Nsif6HwpLdAQNkpR7?g_st=ic). (That's a map link, not Street View, but if you click into Street View you can see the two street signs with the same name.)
Quote from: OracleUsr on January 04, 2020, 12:03:52 AM
I-77 Charlotte
I don't think that's what the OP was thinking, but there's an even better example of swapping lanes in North Carolina: crossover I-85 for the Thomasville rest area near MM 99. It is actually two separate rest areas for northbound and southbound, but they are co-located in the median. (I've never stopped there, and always assumed that it was one shared facility).
^^^^
It's not–each side has its own parking and toilets–but the state's Vietnam Veterans Memorial is in between the two rest area facilities and can be accessed from both sides. I've stopped at the northbound rest area but have never walked down to the memorial for whatever reason.
Quote from: Dirt Roads on October 15, 2022, 09:53:11 AM
... there's an even better example of swapping lanes in North Carolina: crossover I-85 for the Thomasville rest area near MM 99. It is actually two separate rest areas for northbound and southbound, but they are co-located in the median. (I've never stopped there, and always assumed that it was one shared facility).
There's probably an AA thread on this type of road elsewhere, but as long as people are mentioning them here, there's the Beeline Highway, AZ-87, about 35 miles NW of Mesa. And the longest one of all, I-5 just north of Castaic, CA, known as the Five Mile Grade, 4.5 miles of which is swapped. That's a particularly dramatic one because of the big canyon between the two sides, and the wide visibility.
Two rather spectacular elevation-gaining loops in Asia:
https://goo.gl/maps/SKvcdpG52sy3cYfD9 (https://goo.gl/maps/SKvcdpG52sy3cYfD9) -- Being in China, the road data and the imagery are offset from each other so the bombs will miss their targets, and no Street View. But in Google Earth, there's a decent 3D model of the bridge.
https://goo.gl/maps/hgGimsiipcxa5HUc7 (https://goo.gl/maps/hgGimsiipcxa5HUc7) -- Too bad there's no 3D imagery here, but the Street View captures it well.
Does the OP mean roads where the lanes simply cross over each other (like the Jersey Turnpike) or where they follow a spiral path? Any road that may have too sharp an increase in grade may have to use a spiral to gradually get higher or lower, or possibly follow a spiral path to get out of a mountainous area and it has to follow the valleys. Beltway are just circles, cities like Houston have 2 complete beltways, arguably 3, but if they were all the same road in a spiral pattern that wouldn't make sense. Any roads that cross themselves in a loop and then continue on elsewhere not for the reasons above, are most likely the result of the way they were numbered, and it's just connecting roads. Unsure.
It means what it says. You cross another road. Remain on your road for a great distance and you eventually end up at the same intersection on the crossroad.
Breezewood, PA has this sort of. You head east on I-70 and you cross under the I-70 you will eventually be on later. Though the alignment changes twice at US 30 though. If I-70 didn’t change twice at US 30 and remained continuous it would be perfect example.
That's more than a cross-over, that's a straight up gap in the interstate. You have to take US 30 to get on the remaining north-south section. If it wasn't for that gap, it would just be like any basic interchange, you cross under the overpass, get off at the exit, and end up on the overpass you just drove under. I thought this thread was talking about local roads where you may actually be able to turn onto the same place you crossed over in both places, meaning you went nowhere, which would make 0 sense. But expressways doing that are obviously trying to work there way around the terrain.
Quote from: MultiMillionMiler on October 29, 2022, 10:40:50 AM
Does the OP mean roads where the lanes simply cross over each other (like the Jersey Turnpike) or where they follow a spiral path?
Did you even read the OP?
Quote from: MultiMillionMiler on October 29, 2022, 11:12:48 AM
I thought this thread was talking about local roads where you may actually be able to turn onto the same place you crossed over in both places, meaning you went nowhere, which would make 0 sense. But expressways doing that are obviously trying to work there way around the terrain.
Examples have been given already that make sense, such as...
Quote from: 1995hoo on October 15, 2022, 08:46:47 AM
... where Colesbury Place intersects itself in Fairfax, Virginia (https://maps.app.goo.gl/Nsif6HwpLdAQNkpR7?g_st=ic). (That's a map link, not Street View, but if you click into Street View you can see the two street signs with the same name.)
However, in my opinion, there's a subtle difference between "intersecting" and "crossing". In my mind, it's hard to consider a T-intersection as a "crossing"
Quote from: MultiMillionMiler on October 29, 2022, 11:12:48 AM
That's more than a cross-over, that's a straight up gap in the interstate. You have to take US 30 to get on the remaining north-south section. If it wasn't for that gap, it would just be like any basic interchange, you cross under the overpass, get off at the exit, and end up on the overpass you just drove under.
No it's a crossover. See this: https://goo.gl/maps/8rNjbxRErqfKpYoJA (https://goo.gl/maps/8rNjbxRErqfKpYoJA)
Here you can plainly see that I-70 crosses itself, and I-70 EB actually crosses twice.
^Yes, that section of US-30 is I-70, and the loop is the second crossover.
Kentucky Route 620 has nothing to do with this, although it is a strange route for sure.
Is that section of US-30 limited access, or is it another example of non-limited access stretches of interstate?
The double cross over is really weird, wonder why they build it like that. Also funny how the Pennsylvania Turnpike has like 4 different designations along its length.
Quote from: kphoger on October 31, 2022, 10:47:00 AM
Examples have been given already that make sense, such as...
Quote from: 1995hoo on October 15, 2022, 08:46:47 AM
... where Colesbury Place intersects itself in Fairfax, Virginia (https://maps.app.goo.gl/Nsif6HwpLdAQNkpR7?g_st=ic). (That's a map link, not Street View, but if you click into Street View you can see the two street signs with the same name.)
However, in my opinion, there's a subtle difference between "intersecting" and "crossing". In my mind, it's hard to consider a T-intersection as a "crossing"
I agree with your comment, but if you look back at my full post, you'll see I was responding to a comment about a street intersecting with itself. (Of course I recognize that the comment to which I was responding was either sarcastic or snarky, but that wasn't going to stop me from giving an example.)
Quote from: MultiMillionMiler on November 01, 2022, 08:31:17 AM
... because it isn't on the map ...
Yes it is. (https://www.bing.com/maps?osid=1208f9c4-51df-4464-a011-5bb0a582c562&cp=39.999271~-78.236233&lvl=19&v=2&sV=2&form=S00027)
Quote from: kphoger on November 01, 2022, 10:35:50 AM
Quote from: MultiMillionMiler on November 01, 2022, 08:31:17 AM
... because it isn't on the map ...
Yes it is. (https://www.bing.com/maps?osid=1208f9c4-51df-4464-a011-5bb0a582c562&cp=39.999271~-78.236233&lvl=19&v=2&sV=2&form=S00027)
That said, I don't believe that that it of US-30 is officially part of I-70. I haven't been able to verify, but I think it's officially a gap.
For what it's worth, the Penn DOT One Map of the area looks like this:
(https://i.imgur.com/2LbS6fO.png)
https://gis.penndot.gov/onemap/
Might as well be part of I-70 being PennDOT or PTC will never build a proper interchange. I-73 in Ohio has a better chance of being completed than that.
Anyway that's why said sort of.
Quote from: CtrlAltDel on November 01, 2022, 10:43:07 AM
Quote from: kphoger on November 01, 2022, 10:35:50 AM
Quote from: MultiMillionMiler on November 01, 2022, 08:31:17 AM
... because it isn't on the map ...
Yes it is. (https://www.bing.com/maps?osid=1208f9c4-51df-4464-a011-5bb0a582c562&cp=39.999271~-78.236233&lvl=19&v=2&sV=2&form=S00027)
That said, I don't believe that that it of US-30 is officially part of I-70. I haven't been able to verify, but I think it's officially a gap.
For what it's worth, the Penn DOT One Map of the area looks like this:
(https://i.imgur.com/2LbS6fO.png)
https://gis.penndot.gov/onemap/
According to the NHS map (https://hepgis.fhwa.dot.gov/fhwagis/), it's US 30 alone; the ramps from the PTC don't even register, though they have I-70 shields on the basemap.
Quote from: MultiMillionMiler on November 01, 2022, 09:58:33 AM
Is that section of US-30 limited access
The fact that you don't understand Breezewood makes it so clear you are brand-new here.
Quote from: kirbykart on November 01, 2022, 01:02:40 PM
Quote from: MultiMillionMiler on November 01, 2022, 09:58:33 AM
Is that section of US-30 limited access
The fact that you don't understand Breezewood makes it so clear you are brand-new here.
I just joined a week ago lol, you're right, even just looking at it on the map is confusing, why did they build it like that?
^The local businesses protested a direct interchange.
The realignment of the PA Turnpike when Rays and Sideling Hill Tunnels got bypassed is what made it what it was today.
Quote from: roadman65 on November 01, 2022, 01:41:08 PM
The realignment of the PA Turnpike when Rays and Sideling Hill Tunnels got bypassed is what made it what it was today.
That, the original prohibition of spending federal funds on direct interstate to toll road connections. And, as Kirbykart said, the local business interests and other PennDOT/Turnpike priorities helped keep the interchange the same to the consternation of many travelers and roadgeeks.
Does a roundabout count?
Quote from: Avalanchez71 on November 01, 2022, 06:39:43 PM
Does a roundabout count?
Only if legally permitted U-turns count too.
Quote from: zzcarp on November 01, 2022, 01:45:24 PM
Quote from: roadman65 on November 01, 2022, 01:41:08 PM
The realignment of the PA Turnpike when Rays and Sideling Hill Tunnels got bypassed is what made it what it was today.
That, the original prohibition of spending federal funds on direct interstate to toll road connections.
*citation needed*
Quote from: Rothman on November 01, 2022, 09:40:20 PM
Quote from: zzcarp on November 01, 2022, 01:45:24 PM
Quote from: roadman65 on November 01, 2022, 01:41:08 PM
The realignment of the PA Turnpike when Rays and Sideling Hill Tunnels got bypassed is what made it what it was today.
That, the original prohibition of spending federal funds on direct interstate to toll road connections.
*citation needed*
" In some cases, Federal funds were used to build interchanges between toll-free Interstates and Interstate turnpikes. However, under Section 113 (c) of the Federal-Aid Highway Act of 1956, the State highway agency and toll authority had to first enter into an agreement to use all toll revenue to pay for debt retirement, maintenance, and operation, after which toll collection would end . . . The Pennsylvania Turnpike Commission (PTC), which had no desire to stop collecting tolls, decided not to use the State's Federal-aid funds for the I-70 connection. The PTC also decided against using its own revenue for the interchanges." (https://www.fhwa.dot.gov/infrastructure/tollroad.cfm)
Quote from: Occidental Tourist on November 02, 2022, 01:43:17 AM
Quote from: Rothman on November 01, 2022, 09:40:20 PM
Quote from: zzcarp on November 01, 2022, 01:45:24 PM
Quote from: roadman65 on November 01, 2022, 01:41:08 PM
The realignment of the PA Turnpike when Rays and Sideling Hill Tunnels got bypassed is what made it what it was today.
That, the original prohibition of spending federal funds on direct interstate to toll road connections.
*citation needed*
" In some cases, Federal funds were used to build interchanges between toll-free Interstates and Interstate turnpikes. However, under Section 113 (c) of the Federal-Aid Highway Act of 1956, the State highway agency and toll authority had to first enter into an agreement to use all toll revenue to pay for debt retirement, maintenance, and operation, after which toll collection would end . . . The Pennsylvania Turnpike Commission (PTC), which had no desire to stop collecting tolls, decided not to use the State's Federal-aid funds for the I-70 connection. The PTC also decided against using its own revenue for the interchanges." (https://www.fhwa.dot.gov/infrastructure/tollroad.cfm)
Despite the law, it was still a state-level decision to not fund the building of interchanges between the Turnpike and free limited-access highways. Other states managed it just fine; I assume through using toll revenue and other non-federal funding.