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[sprjus4]

50 MPH is permitted on urban interstate highways, so that segment of I-75 would meet interstate standards.

[Flint1979]

50 MPH is permitted on urban interstate highways, so that segment of I-75 would meet interstate standards.

Heck in St. Paul I-35E goes down to 45 mph.

[Flint1979]

Actually backing up to the serious accidents that have happened there. The entire bridge collapsed about 5 or so years ago. That was the 9 Mile bridge and there has been flooding in that area too.

[Flint1979]

The collapse was due to a tanker explosion

[Flint1979]

I also remember another tanker explosion that happened on one of the ramps from I-94 to I-75 about 20 years ago I went down there about a week later and you could still smell the gas from the explosion

[Bickendan]

In response to Brandon: I-82 also violates the numbering standard by primarily being a N/S interstate instead of E/W interstate (caused by the original plan to come from Tacoma and over Naches Pass).

Not if you consider it part of the Seattle-Boise corridor, even if it has a lot of N/S movement, and is entirely N/S (and technically wrong-way E/W) in Oregon.

In response to KP Hoger: I will admit that I haven't been through there since September, so my memory might be a little foggy. I'm also not going through a good time in my life right now in all aspects. All I remember was it was around the Rooster Rock area (if it exists). It might not be against standards but I thought it was.

Eastbound or westbound?

Did anyone mention the Interstate bridge or Marqum bridge yet? Both have narrower lanes, and no shoulders. Also the Freemont [sic] Bridge is borderline but I think it makes the cut of being standard.

I believe both were up to Interstate Standards when they were built. Standards since have gotten better.
Edit: I'm not counting the left exits on both bridges, as they were built expressly with respective thru routes in mind. Eastbound US 30 left exits from the Fremont Bridge as it was a left entrance on the otherside; the double deck configuration puts the westbound lanes as a right entrance and a right exit. The westside interchange is a full on Wye; clearance to dip the I-405 N -> US 30 W ramp under the viaduct probably isn't there to also clear the ground level structures and streets.
Arguable violation: Weaving needed for I-405 S -> NW Glisan/Everett/15th; Glisan/Everett/14th -> US 30 W.

I-5 S -> I-405 N was meant to be the US 26 through lanes from unbuilt I-80N. The upper deck is a right entrance and would have been a right exit, with the I-5 S -> I-80N/US 26 E movement similar to the I-405/US 30 Wye. That ghost ramp is still there to marvel at.

And there are no plans to widen the I-82 bridge.

Certainly not from ODOT. I doubt WSDOT is considering it, however.

And can I add I-5 in the Willamette Valley for that ridiculous 65T60 limit?

Now these are violations:
I-5 Baldock Freeway: Terwilliger Curves
Built as such due to political grandstanding. ODOT has the fix drafted out, but would require nasty ROW acquistion, and be a NIMBY and political fraught battle. Also, expensive.

I-205 Abernathy Bridge. In the pipeline to be addressed with the seismic retrofit accompanying the widening of I-205 from OR 99E to Wanker's Corner Stafford.

I-5 Pacific Hwy: South Salem Hills. Possibly. There's one narrow overpass south of Keubler, and there are truck climbing lanes. I believe ODOT has long range plans to widen the freeway from Keubler down toward Albany at some point.

I-405/US 26: 6th Ave -> 12th Ave. Horrendous weaving that can back up traffic onto the Marquam Bridge, and through the Ross Island Maze. Southbound isn't much better with the Montgomery St onramp interacting with the US 26 W onramp and offramp, though that doesn't get nearly as much use.

I-35/70, Kansas City.

[SteveG1988]

I-295/76 connection in NJ (currently being fixed)

I-676 (The traffic lights, depending on your view of if 676 actually uses the bridge or not. Or the general narrowness of the death star trench run section)

I-55 crossing between TN and AR on the Memphis-Arkansas Bridge. No shoulders, and that cloverleaf for through traffic on the TN side. AR side is adequate.

[X99]

I-5 S -> I-405 N was meant to be the US 26 through lanes from unbuilt I-80N. The upper deck is a right entrance and would have been a right exit, with the I-5 S -> I-80N/US 26 E movement similar to the I-405/US 30 Wye. That ghost ramp is still there to marvel at.

There used to be a Wikipedia page dedicated to ghost ramps and unused roads. It was removed after the definition of "unused" was changed to "never used once in its life" and a second page was made for the rest. Every unused road page except Bridge to Nowhere has been deleted. Might make an interesting thread, but I don't know which board to put it on.

[SteveG1988]

I-5 S -> I-405 N was meant to be the US 26 through lanes from unbuilt I-80N. The upper deck is a right entrance and would have been a right exit, with the I-5 S -> I-80N/US 26 E movement similar to the I-405/US 30 Wye. That ghost ramp is still there to marvel at.

There used to be a Wikipedia page dedicated to ghost ramps and unused roads. It was removed after the definition of "unused" was changed to "never used once in its life" and a second page was made for the rest. Every unused road page except Bridge to Nowhere has been deleted. Might make an interesting thread, but I don't know which board to put it on.

Yeah, i thought that was a bit pedantic to remove it for that, cannot even restore it.

[MCRoads]

What about I-74 in the quad cities?

The bridge over the Mississippi R. Is VERY narrow, and DEFINITLY not to standard.

[TheHighwayMan394]

What about I-74 in the quad cities?

The bridge over the Mississippi R. Is VERY narrow, and DEFINITLY not to standard.

That bridge’s replacement is under construction so maybe that’s why it was omitted.

[Henry]

I just thought up another one: I-520! I don't care that it exists in two states, but as a half-loop around Augusta, it needs a more appropriate number like I-420 or I-620.

[X99]

I-5 S -> I-405 N was meant to be the US 26 through lanes from unbuilt I-80N. The upper deck is a right entrance and would have been a right exit, with the I-5 S -> I-80N/US 26 E movement similar to the I-405/US 30 Wye. That ghost ramp is still there to marvel at.

There used to be a Wikipedia page dedicated to ghost ramps and unused roads. It was removed after the definition of "unused" was changed to "never used once in its life" and a second page was made for the rest. Every unused road page except Bridge to Nowhere has been deleted. Might make an interesting thread, but I don't know which board to put it on.

Yeah, i thought that was a bit pedantic to remove it for that, cannot even restore it.

I still have access to one of those pages, but only to move the entries to their respective road pages. I am not allowed to give anyone else access to it.

[1]

I-5 S -> I-405 N was meant to be the US 26 through lanes from unbuilt I-80N. The upper deck is a right entrance and would have been a right exit, with the I-5 S -> I-80N/US 26 E movement similar to the I-405/US 30 Wye. That ghost ramp is still there to marvel at.

There used to be a Wikipedia page dedicated to ghost ramps and unused roads. It was removed after the definition of "unused" was changed to "never used once in its life" and a second page was made for the rest. Every unused road page except Bridge to Nowhere has been deleted. Might make an interesting thread, but I don't know which board to put it on.

Yeah, i thought that was a bit pedantic to remove it for that, cannot even restore it.

I still have access to one of those pages, but only to move the entries to their respective road pages. I am not allowed to give anyone else access to it.

There are no private Wikipedia pages. Even if you are an admin (and therefore are able to see deleted pages), so are Scott5114, Bruce, and seicer.

[X99]

I-5 S -> I-405 N was meant to be the US 26 through lanes from unbuilt I-80N. The upper deck is a right entrance and would have been a right exit, with the I-5 S -> I-80N/US 26 E movement similar to the I-405/US 30 Wye. That ghost ramp is still there to marvel at.

There used to be a Wikipedia page dedicated to ghost ramps and unused roads. It was removed after the definition of "unused" was changed to "never used once in its life" and a second page was made for the rest. Every unused road page except Bridge to Nowhere has been deleted. Might make an interesting thread, but I don't know which board to put it on.

Yeah, i thought that was a bit pedantic to remove it for that, cannot even restore it.

I still have access to one of those pages, but only to move the entries to their respective road pages. I am not allowed to give anyone else access to it.

There are no private Wikipedia pages. Even if you are an admin (and therefore are able to see deleted pages), so are Scott5114, Bruce, and seicer.

The page I am talking about is currently a child page (if I'm using that term right) of my own user page.

[JREwing78]

I-94 through Detroit is substandard with no inner shoulder, short on-off ramps. and left entrances/exits. It's one of the few freeways in Michigan posted for 55 mph. Granted, this stretch dates from the late 1940s and early 1950s. MDOT is working to upgrade some portions of the highway: https://i94detroit.org/

Additionally, I-94 between Parma, MI and east of Jackson, MI (Sargent Rd), the ramps are very short, and between US-127 North and Elm Ave there is only a few inches of inner shoulder before you hit the hard barrier. This stretch also dates from the late 1940s and early 1950s.

MDOT has made a number of minor changes over the past 40 years to improve safety (removing exits, installation of center barrier, etc). But they are making their largest effort to bring the stretch up to modern standards with replacement of the bridges over the Grand River, and reconstruction of the highway between US-127 North and US-127 South. https://www.michigan.gov/mdot/0,4616,7-151-9621_11008_86278---,00.html

[texaskdog]

I 90 has almost direct turns off the freeway in South Dakota....I think they do in Wyoming as well.  Also I-75 just south of the Mackinac Bridge at James Street just has a sharp turn.

[X99]

I 90 has almost direct turns off the freeway in South Dakota.

Which exits are you talking about here?