Which of the contiguous 48 states have Interstates that are discontinuous from other Interstates in the same state?
One obvious example is Nevada with I-15 (and 215, 515, 11, etc) and I-80 (and 580), which are both Interstates but do not have any Interstate connection within Nevada (you have to go to Utah or California if you want to stay on Interstates going from Las Vegas to Reno).
Another example is Georgia, most of the Interstates connect within the state but I-24 and I-59 are separate, to reach them from I-75 (and the other Georgia interstates) requires passing through Tennessee.
I-684 in CT :bigass:
I-70 and I-470 as a package in WV
I-86 redux in PA (the piece near Waverly)
I-44 in TX
I-95 in New Hampshire
I-129 in Nebraska
I-27/40 in Texas
I-72 in Missouri
I-516 in Georgia
Idaho: I-90
I-15 in Arizona
I-2/69s in Texas
I-535 in Wisconsin
I-95/495 in DC
I-81 in West Virginia
Not too long ago:
I-520 in South Carolina
I-585 in South Carolina
I-73/74 in North Carolina
Chris
Mississippi - 10 doesn't connect to anything else... intersections with 59 and 55 are in Louisiana.
Missouri - 72 doesn't connect to the rest of the state's network.
Tennessee - 155, until 69 connects, if it ever does...
New York - 78 stubs into Manhattan without any connections to the rest of the system.
Maybe Kentucky? I don't think 69/24/169 connect to the Eastern KY interstates yet, but I vaguely recall some newly designated 3dis that will fill in the gap.
Honorable mention... Washington DC, where 66 doesn't intersect the x95s.
I-275 in Indiana
Quote from: jp the roadgeek on February 24, 2021, 08:00:23 PM
I-684 in CT :bigass:
I-70 and I-470 as a package in WV
I-86 redux in PA (the piece near Waverly)
I-44 in TX
In Texas I-40/27 is also separate from the other Interstates
Quote from: ran4sh on February 24, 2021, 08:18:12 PM
Quote from: jp the roadgeek on February 24, 2021, 08:00:23 PM
I-684 in CT :bigass:
I-70 and I-470 as a package in WV
I-86 redux in PA (the piece near Waverly)
I-44 in TX
In Texas I-40/27 is also separate from the other Interstates
See post 3.
Chris
Quote from: 1 on February 24, 2021, 08:00:32 PM
I-95 in New Hampshire
I-129 in Nebraska
I-27/40 in Texas
I-72 in Missouri
I-516 in Georgia
I-516 doesn't count, it connects to I-16
I-585 in SC, and formerly I-520 in SC (Edited onto a post by another poster just before I posted this? Around 8:34, wasn't my intention to mention these twice)
I-69C in TX (69E and 2 were mentioned, but not 69C)
Honorable mentions:
I-75 in the Upper Peninsula, analogous situation but still in the same state
I-84 almost entering NJ
Quote from: index on February 24, 2021, 08:35:31 PM
I-585 in SC, and formerly I-520 in SC
I-69C in TX (69E and 2 were mentioned, but not 69C)
Honorable mentions:
I-75 in the Upper Peninsula, analogous situation but still in the same state
I-84 almost entering NJ
I-585 got extended north, so now it connects with I-85.
I put I-2/69s referring to the multitude of 69s down there, but great minds! 👍
Chris
Quote from: ran4sh on February 24, 2021, 08:19:25 PM
Quote from: 1 on February 24, 2021, 08:00:32 PM
I-95 in New Hampshire
I-129 in Nebraska
I-27/40 in Texas
I-72 in Missouri
I-516 in Georgia
I-516 doesn't count, it connects to I-16
I don't know how I missed that. For some reason, I had remembered it as an Interstate that didn't touch any others at all.
Quote from: jayhawkco on February 24, 2021, 08:37:21 PM
Quote from: index on February 24, 2021, 08:35:31 PM
I-585 in SC, and formerly I-520 in SC
I-69C in TX (69E and 2 were mentioned, but not 69C)
Honorable mentions:
I-75 in the Upper Peninsula, analogous situation but still in the same state
I-84 almost entering NJ
I-585 got extended north, so now it connects with I-85.
I put I-2/69s referring to the multitude of 69s down there, but great minds!
Chris
Huh. Looks like it did judging by its wiki page. When I checked Wikipedia's list of highways in SC just to make sure when I posted it, it didn't reflect that: http://prntscr.com/1062pzv (http://prntscr.com/1062pzv)
It also looks like by coincidence your post was edited right before mine was posted. You could've edited it to mention the 69s but I wouldn't have been able to see it when I posted. So now we have all the 69s. Well, sans 69W as it connects to 35. Easy to miss that one, it hardly exists and its other siblings, which both meet the criteria of this thread, are so far away.
Quote from: jayhawkco on February 24, 2021, 08:37:21 PM
I-585 got extended north, so now it connects with I-85.
Do you have a source for that? I was just up there and I definitely got the sense that 585 did not make it all the way to 85. It connects through Business 85 for sure but there's definitely one at-grade intersection with a stoplight between the US 176 diamond interchange at I-85 and the I-585 freeway. In addition, the exit from 85 is currently signed "US 176 to I-585" (https://goo.gl/maps/Peqfumi2o2DQrJR89).
If 585 does connect all the way through to 85, that would make it a very rare example of an interstate with a signalized at-grade intersection.
Quote from: US 89 on February 24, 2021, 08:55:49 PM
Quote from: jayhawkco on February 24, 2021, 08:37:21 PM
I-585 got extended north, so now it connects with I-85.
Do you have a source for that? I was just up there and I definitely got the sense that 585 did not make it all the way to 85. It connects through Business 85 for sure but there's definitely one at-grade intersection with a stoplight between the US 176 diamond interchange at I-85 and the I-585 freeway. In addition, the exit from 85 is currently signed "US 176 to I-585" (https://goo.gl/maps/Peqfumi2o2DQrJR89).
If 585 does connect all the way through to 85, that would make it a very rare example of an interstate with a signalized at-grade intersection.
I've heard this website is good. (https://www.interstate-guide.com/i-585-sc/). :bigass:
Chris
Quote from: citrus on February 24, 2021, 08:08:04 PM
Mississippi - 10 doesn't connect to anything else... intersections with 59 and 55 are in Louisiana.
Missouri - 72 doesn't connect to the rest of the state's network.
Tennessee - 155, until 69 connects, if it ever does...
New York - 78 stubs into Manhattan without any connections to the rest of the system.
Maybe Kentucky? I don't think 69/24/169 connect to the Eastern KY interstates yet, but I vaguely recall some newly designated 3dis that will fill in the gap.
Honorable mention... Washington DC, where 66 doesn't intersect the x95s.
I-569 was signed into law last year. So, on paper the WKPY is now an interstate between I-69 & I-65. No telling how long it will take KY to make the necessary upgrades to sign it in the field.
Quote from: Ryctor2018 on February 25, 2021, 12:11:22 AM
Quote from: citrus on February 24, 2021, 08:08:04 PM
Mississippi - 10 doesn't connect to anything else... intersections with 59 and 55 are in Louisiana.
Missouri - 72 doesn't connect to the rest of the state's network.
Tennessee - 155, until 69 connects, if it ever does...
New York - 78 stubs into Manhattan without any connections to the rest of the system.
Maybe Kentucky? I don't think 69/24/169 connect to the Eastern KY interstates yet, but I vaguely recall some newly designated 3dis that will fill in the gap.
Honorable mention... Washington DC, where 66 doesn't intersect the x95s.
I-569 was signed into law last year. So, on paper the WKPY is now an interstate between I-69 & I-65. No telling how long it will take KY to make the necessary upgrades to sign it in the field.
I remember it being designated up to I-165 but not past that. Did that change? Either way it would still connect to the rest of the state, just a little more crooked.
I-155 in Tennessee.
I-535 in Wisconsin
Considering that the Mackinac Bridge isn't an Interstate or up to Interstate standards could I-75 in the U.P. be considered discontinuous even though the same highway exists in the Lower Peninsula. That's the only example of Michigan I could think of.
Mackinac Bridge is still I-75, even though it isn't a freeway.
Future I-785 in Virginia
I-95 in North Carolina used to be until I-40 was constructed and connected to the route in the 1990s.
Quote from: I-55 on February 25, 2021, 12:18:11 AM
Quote from: Ryctor2018 on February 25, 2021, 12:11:22 AM
Quote from: citrus on February 24, 2021, 08:08:04 PM
Mississippi - 10 doesn't connect to anything else... intersections with 59 and 55 are in Louisiana.
Missouri - 72 doesn't connect to the rest of the state's network.
Tennessee - 155, until 69 connects, if it ever does...
New York - 78 stubs into Manhattan without any connections to the rest of the system.
Maybe Kentucky? I don't think 69/24/169 connect to the Eastern KY interstates yet, but I vaguely recall some newly designated 3dis that will fill in the gap.
Honorable mention... Washington DC, where 66 doesn't intersect the x95s.
I-569 was signed into law last year. So, on paper the WKPY is now an interstate between I-69 & I-65. No telling how long it will take KY to make the necessary upgrades to sign it in the field.
I remember it being designated up to I-165 but not past that. Did that change? Either way it would still connect to the rest of the state, just a little more crooked.
I-169 will be the Pennyrile Pkwy and I-165 will be the Natcher Pkwy.
iPhone
I-24 in Kentucky probably would have counted up until the time that I-69 was created. Even then, though, both legs of I-69 off I-24 end without a link to another interstate connection.
Quote from: jayhawkco on February 24, 2021, 09:05:54 PM
Quote from: US 89 on February 24, 2021, 08:55:49 PM
Quote from: jayhawkco on February 24, 2021, 08:37:21 PM
I-585 got extended north, so now it connects with I-85.
Do you have a source for that? I was just up there and I definitely got the sense that 585 did not make it all the way to 85. It connects through Business 85 for sure but there's definitely one at-grade intersection with a stoplight between the US 176 diamond interchange at I-85 and the I-585 freeway. In addition, the exit from 85 is currently signed "US 176 to I-585" (https://goo.gl/maps/Peqfumi2o2DQrJR89).
If 585 does connect all the way through to 85, that would make it a very rare example of an interstate with a signalized at-grade intersection.
I've heard this website is good. (https://www.interstate-guide.com/i-585-sc/). :bigass:
Chris
The Wiki page ignores its own reference to the highway logmile report (a thing I did not know existed).
The logmile report (https://ris.scdot.org/LogMileReport.aspx?county=42&type=1&number=585&auxiliary=0&map=y) clearly indicates the north end of I-585 is 0.18 miles north of SC 85 (which is I-85 Bus).
Quote from: Mapmikey on February 25, 2021, 10:37:53 AM
Quote from: jayhawkco on February 24, 2021, 09:05:54 PM
Quote from: US 89 on February 24, 2021, 08:55:49 PM
Quote from: jayhawkco on February 24, 2021, 08:37:21 PM
I-585 got extended north, so now it connects with I-85.
Do you have a source for that? I was just up there and I definitely got the sense that 585 did not make it all the way to 85. It connects through Business 85 for sure but there's definitely one at-grade intersection with a stoplight between the US 176 diamond interchange at I-85 and the I-585 freeway. In addition, the exit from 85 is currently signed "US 176 to I-585" (https://goo.gl/maps/Peqfumi2o2DQrJR89).
If 585 does connect all the way through to 85, that would make it a very rare example of an interstate with a signalized at-grade intersection.
I've heard this website is good. (https://www.interstate-guide.com/i-585-sc/). :bigass:
Chris
The Wiki page ignores its own reference to the highway logmile report (a thing I did not know existed).
The logmile report (https://ris.scdot.org/LogMileReport.aspx?county=42&type=1&number=585&auxiliary=0&map=y) clearly indicates the north end of I-585 is 0.18 miles north of SC 85 (which is I-85 Bus).
Interesting, because SCDOT has signed 585 pretty well for about a mile past that. The Valley Falls Rd. interchange a little less than a mile north of BL-85 has
clear signage (https://goo.gl/maps/bAh5w2LxRWBSQLdw8) in both directions (https://goo.gl/maps/uPV7WAsuqkKvPJsQA) showing I-585 going both north and south. If you get on the ramp to 585 north/176 west, you'll get this reassurance marker (https://goo.gl/maps/Yf6nHwxMxtRpJTr76) (which I can confirm is still there as of January 2021). Heading away from the I-85 diamond, there is a reassurance marker only for US 176 east (https://goo.gl/maps/cwTapCHFtPN4RkFV9).
That northbound reassurance past Valley Falls was the northernmost reference to 585 I could find. I know we can't always trust signage for everything, but if we did in this case it would appear 585 ends at the Fairforest Rd light.
Quote from: bassoon1986 on February 25, 2021, 09:54:01 AM
Quote from: I-55 on February 25, 2021, 12:18:11 AM
Quote from: Ryctor2018 on February 25, 2021, 12:11:22 AM
Quote from: citrus on February 24, 2021, 08:08:04 PM
Mississippi - 10 doesn't connect to anything else... intersections with 59 and 55 are in Louisiana.
Missouri - 72 doesn't connect to the rest of the state's network.
Tennessee - 155, until 69 connects, if it ever does...
New York - 78 stubs into Manhattan without any connections to the rest of the system.
Maybe Kentucky? I don't think 69/24/169 connect to the Eastern KY interstates yet, but I vaguely recall some newly designated 3dis that will fill in the gap.
Honorable mention... Washington DC, where 66 doesn't intersect the x95s.
I-569 was signed into law last year. So, on paper the WKPY is now an interstate between I-69 & I-65. No telling how long it will take KY to make the necessary upgrades to sign it in the field.
I remember it being designated up to I-165 but not past that. Did that change? Either way it would still connect to the rest of the state, just a little more crooked.
I-169 will be the Pennyrile Pkwy and I-165 will be the Natcher Pkwy.
iPhone
This is the article on Interstate 569 being signed into law: https://www.14news.com/2020/01/02/proposed-bill-make-w-ky-pkwy-i-spur-passes/
Quote from: US 89 on February 25, 2021, 12:08:07 PM
Quote from: Mapmikey on February 25, 2021, 10:37:53 AM
Quote from: jayhawkco on February 24, 2021, 09:05:54 PM
Quote from: US 89 on February 24, 2021, 08:55:49 PM
Quote from: jayhawkco on February 24, 2021, 08:37:21 PM
I-585 got extended north, so now it connects with I-85.
Do you have a source for that? I was just up there and I definitely got the sense that 585 did not make it all the way to 85. It connects through Business 85 for sure but there's definitely one at-grade intersection with a stoplight between the US 176 diamond interchange at I-85 and the I-585 freeway. In addition, the exit from 85 is currently signed "US 176 to I-585" (https://goo.gl/maps/Peqfumi2o2DQrJR89).
If 585 does connect all the way through to 85, that would make it a very rare example of an interstate with a signalized at-grade intersection.
I've heard this website is good. (https://www.interstate-guide.com/i-585-sc/). :bigass:
Chris
The Wiki page ignores its own reference to the highway logmile report (a thing I did not know existed).
The logmile report (https://ris.scdot.org/LogMileReport.aspx?county=42&type=1&number=585&auxiliary=0&map=y) clearly indicates the north end of I-585 is 0.18 miles north of SC 85 (which is I-85 Bus).
Interesting, because SCDOT has signed 585 pretty well for about a mile past that. The Valley Falls Rd. interchange a little less than a mile north of BL-85 has clear signage (https://goo.gl/maps/bAh5w2LxRWBSQLdw8) in both directions (https://goo.gl/maps/uPV7WAsuqkKvPJsQA) showing I-585 going both north and south. If you get on the ramp to 585 north/176 west, you'll get this reassurance marker (https://goo.gl/maps/Yf6nHwxMxtRpJTr76) (which I can confirm is still there as of January 2021). Heading away from the I-85 diamond, there is a reassurance marker only for US 176 east (https://goo.gl/maps/cwTapCHFtPN4RkFV9).
That northbound reassurance past Valley Falls was the northernmost reference to 585 I could find. I know we can't always trust signage for everything, but if we did in this case it would appear 585 ends at the Fairforest Rd light.
Some of that signage is nearing 10 years old. No idea why it has been signed past 85 Bus. SC is generally known for its paucity of signage instead of an abundance...