CA-58 and I-40

[ElishaGOtis]

An eastern extension of unsigned Interstate 305 along US 50 between Sacramento and Placerville would be more logical (although just as unlikely) as a western extension of Interstate 70.

Or maybe that section of US 50 could just be designated as "I-50" for consistency of numbering? A longer I-50 would never be built, and it fits into the Interstate numbering scheme.  There are other instances in which numbers are maintained across designations (SR and I-15, SR and I-110 for example), and an I-50 designation might be even more meaningful for that area. But I know there are AASHTO considerations, so it probably wouldn't happen.

I-305 is a FHWA designation which accounts for what was a chargeable corridor and the mileage which comprised it.  Approval from AASHTO was never sought because Caltrans had no interest in pursuing a legislatively defined Route 305. 

I do believe the US 50 does meet Interstate design standards though from I-80 east to the vicinity of Placerville.  In theory there isn't really anything AASHTO or the FHWA would object to if a a non-chargeable Interstate designation was sought.  Somehow I think they would find a way to object to "I-50" though. 

The highway will not be upgraded east of where those Interstate design standards presently end, a short distance west of the signals in Placerville.  "Hangtown" would be an odd place to truncate US 50 at.  I'd say that suggestion is less logical than extending the I-40 designation west of Barstow.

To be clear, I don't think there is a need for any of this.  I like I-305 just fine as a weird entity only a couple dozen people even know about.   

I-305 appears on google maps when you zoom in close enough on US-50 near its western terminus, although google likes to make mistakes on route numbering

Google Maps tends to obtain information recently discussed on social media I've noticed. 

At what point do y'all think they'll preemptively sign I-40 on SR-58?

[cahwyguy]

I-305 appears on google maps when you zoom in close enough on US-50 near its western terminus, although google likes to make mistakes on route numbering

That's a "Go home, Google, you're drunk." Route 305 is not defined in the legislative code; I-305 is not signed in the field. Legislatively, that segment is part of Route 50, signed as US 50.

It was designated FAI 305 for funding purposes, and (insert appropriate adjective and noun) at Google believed that meant it was signed I-305, and so put it in their system.

[Voyager]

Even a freeway across the Nevada desert would have been silly.

The elevation of Minaret Summit is 9175 feet

Echo Summit, where US 50 crosses the Sierra, 7377 feet

Donner Summit, where I-80 crosses the Sierra, 7239 feet

Above 4000 feet or so is where plowing is necessary, so every mile of road above there is a high operational cost.  Minaret Summit should have been dismissed after one envelope's worth of calculations.  Same with a tunnel when there are both Echo Summit and Donner Summit kept open pretty successfully all winter as well as the option of diverting around the high part of the mountains via (you guessed it) CA 58.

From a modern perspective we tend to forget that US 50/Echo Summit/Johnsons Pass were historically by far the favored highway over the Sierra Nevada.  It wasn't until I-80 started to get built that US 40 started seeing similar traffic numbers. 

With Minaret Summit the planners blew it by trying to get a freeway through there as a Chargeable Interstate.  A conventional road was pretty contentious for seven decades prior with Minaret Summit and Mammoth Pass.  It sucks because with how difficult Yosemite has been in recent years having Mammoth Pool Road extend to Minaret Summit would be super convenient. 

The most frustrating part is that there's only a 12 mile gap between the east and west sides as the roads currently exist.

[Max Rockatansky]

Even a freeway across the Nevada desert would have been silly.

The elevation of Minaret Summit is 9175 feet

Echo Summit, where US 50 crosses the Sierra, 7377 feet

Donner Summit, where I-80 crosses the Sierra, 7239 feet

Above 4000 feet or so is where plowing is necessary, so every mile of road above there is a high operational cost.  Minaret Summit should have been dismissed after one envelope's worth of calculations.  Same with a tunnel when there are both Echo Summit and Donner Summit kept open pretty successfully all winter as well as the option of diverting around the high part of the mountains via (you guessed it) CA 58.

From a modern perspective we tend to forget that US 50/Echo Summit/Johnsons Pass were historically by far the favored highway over the Sierra Nevada.  It wasn't until I-80 started to get built that US 40 started seeing similar traffic numbers. 

With Minaret Summit the planners blew it by trying to get a freeway through there as a Chargeable Interstate.  A conventional road was pretty contentious for seven decades prior with Minaret Summit and Mammoth Pass.  It sucks because with how difficult Yosemite has been in recent years having Mammoth Pool Road extend to Minaret Summit would be super convenient. 

The most frustrating part is that there's only a 12 mile gap between the east and west sides as the roads currently exist.

If someone had thought to just build a conventional two-lane highway I don't think it would be even noteworthy in modern times.  People flip over the prospect of modern Trans-Sierra highways but seem completely unaware that Sherman Pass Road was built after 1970.

[pderocco]

Even a freeway across the Nevada desert would have been silly.

The elevation of Minaret Summit is 9175 feet

Echo Summit, where US 50 crosses the Sierra, 7377 feet

Donner Summit, where I-80 crosses the Sierra, 7239 feet

Above 4000 feet or so is where plowing is necessary, so every mile of road above there is a high operational cost.  Minaret Summit should have been dismissed after one envelope's worth of calculations.  Same with a tunnel when there are both Echo Summit and Donner Summit kept open pretty successfully all winter as well as the option of diverting around the high part of the mountains via (you guessed it) CA 58.

From a modern perspective we tend to forget that US 50/Echo Summit/Johnsons Pass were historically by far the favored highway over the Sierra Nevada.  It wasn't until I-80 started to get built that US 40 started seeing similar traffic numbers. 

With Minaret Summit the planners blew it by trying to get a freeway through there as a Chargeable Interstate.  A conventional road was pretty contentious for seven decades prior with Minaret Summit and Mammoth Pass.  It sucks because with how difficult Yosemite has been in recent years having Mammoth Pool Road extend to Minaret Summit would be super convenient. 

The most frustrating part is that there's only a 12 mile gap between the east and west sides as the roads currently exist.

If someone had thought to just build a conventional two-lane highway I don't think it would be even noteworthy in modern times.  People flip over the prospect of modern Trans-Sierra highways but seem completely unaware that Sherman Pass Road was built after 1970.

The latest Caltrans State Highway Map on Rumsey, from 2005, still shows the proposed 190 route over Haiwee Pass, 1000 feet lower than Sherman Pass. Was there ever an official withdrawal of that idea, or did they just stop printing maps?

[Max Rockatansky]

Even a freeway across the Nevada desert would have been silly.

The elevation of Minaret Summit is 9175 feet

Echo Summit, where US 50 crosses the Sierra, 7377 feet

Donner Summit, where I-80 crosses the Sierra, 7239 feet

Above 4000 feet or so is where plowing is necessary, so every mile of road above there is a high operational cost.  Minaret Summit should have been dismissed after one envelope's worth of calculations.  Same with a tunnel when there are both Echo Summit and Donner Summit kept open pretty successfully all winter as well as the option of diverting around the high part of the mountains via (you guessed it) CA 58.

From a modern perspective we tend to forget that US 50/Echo Summit/Johnsons Pass were historically by far the favored highway over the Sierra Nevada.  It wasn't until I-80 started to get built that US 40 started seeing similar traffic numbers. 

With Minaret Summit the planners blew it by trying to get a freeway through there as a Chargeable Interstate.  A conventional road was pretty contentious for seven decades prior with Minaret Summit and Mammoth Pass.  It sucks because with how difficult Yosemite has been in recent years having Mammoth Pool Road extend to Minaret Summit would be super convenient. 

The most frustrating part is that there's only a 12 mile gap between the east and west sides as the roads currently exist.

If someone had thought to just build a conventional two-lane highway I don't think it would be even noteworthy in modern times.  People flip over the prospect of modern Trans-Sierra highways but seem completely unaware that Sherman Pass Road was built after 1970.

The latest Caltrans State Highway Map on Rumsey, from 2005, still shows the proposed 190 route over Haiwee Pass, 1000 feet lower than Sherman Pass. Was there ever an official withdrawal of that idea, or did they just stop printing maps?

The alignment adoption for 190 has never been rescinded.  Not that there is much of a point with Sherman Pass being around.  Having Horseshoe Meadows Road still in the state highway system probably would bring it more mainstream attention.  I'm surprised it isn't more notable given it crosses the 10,000 foot elevation mark.

[pderocco]

Even a freeway across the Nevada desert would have been silly.

The elevation of Minaret Summit is 9175 feet

Echo Summit, where US 50 crosses the Sierra, 7377 feet

Donner Summit, where I-80 crosses the Sierra, 7239 feet

Above 4000 feet or so is where plowing is necessary, so every mile of road above there is a high operational cost.  Minaret Summit should have been dismissed after one envelope's worth of calculations.  Same with a tunnel when there are both Echo Summit and Donner Summit kept open pretty successfully all winter as well as the option of diverting around the high part of the mountains via (you guessed it) CA 58.

From a modern perspective we tend to forget that US 50/Echo Summit/Johnsons Pass were historically by far the favored highway over the Sierra Nevada.  It wasn't until I-80 started to get built that US 40 started seeing similar traffic numbers. 

With Minaret Summit the planners blew it by trying to get a freeway through there as a Chargeable Interstate.  A conventional road was pretty contentious for seven decades prior with Minaret Summit and Mammoth Pass.  It sucks because with how difficult Yosemite has been in recent years having Mammoth Pool Road extend to Minaret Summit would be super convenient. 

The most frustrating part is that there's only a 12 mile gap between the east and west sides as the roads currently exist.

If someone had thought to just build a conventional two-lane highway I don't think it would be even noteworthy in modern times.  People flip over the prospect of modern Trans-Sierra highways but seem completely unaware that Sherman Pass Road was built after 1970.

The latest Caltrans State Highway Map on Rumsey, from 2005, still shows the proposed 190 route over Haiwee Pass, 1000 feet lower than Sherman Pass. Was there ever an official withdrawal of that idea, or did they just stop printing maps?

The alignment adoption for 190 has never been rescinded.  Not that there is much of a point with Sherman Pass being around.  Having Horseshoe Meadows Road still in the state highway system probably would bring it more mainstream attention.  I'm surprised it isn't more notable given it crosses the 10,000 foot elevation mark.

Haiwee, at 8200 feet, might remain open while Sherman is closed. A Horseshoe Meadow route, on the other hand, would climb to almost 11000 feet.

[Max Rockatansky]

Even a freeway across the Nevada desert would have been silly.

The elevation of Minaret Summit is 9175 feet

Echo Summit, where US 50 crosses the Sierra, 7377 feet

Donner Summit, where I-80 crosses the Sierra, 7239 feet

Above 4000 feet or so is where plowing is necessary, so every mile of road above there is a high operational cost.  Minaret Summit should have been dismissed after one envelope's worth of calculations.  Same with a tunnel when there are both Echo Summit and Donner Summit kept open pretty successfully all winter as well as the option of diverting around the high part of the mountains via (you guessed it) CA 58.

From a modern perspective we tend to forget that US 50/Echo Summit/Johnsons Pass were historically by far the favored highway over the Sierra Nevada.  It wasn't until I-80 started to get built that US 40 started seeing similar traffic numbers. 

With Minaret Summit the planners blew it by trying to get a freeway through there as a Chargeable Interstate.  A conventional road was pretty contentious for seven decades prior with Minaret Summit and Mammoth Pass.  It sucks because with how difficult Yosemite has been in recent years having Mammoth Pool Road extend to Minaret Summit would be super convenient. 

The most frustrating part is that there's only a 12 mile gap between the east and west sides as the roads currently exist.

If someone had thought to just build a conventional two-lane highway I don't think it would be even noteworthy in modern times.  People flip over the prospect of modern Trans-Sierra highways but seem completely unaware that Sherman Pass Road was built after 1970.

The latest Caltrans State Highway Map on Rumsey, from 2005, still shows the proposed 190 route over Haiwee Pass, 1000 feet lower than Sherman Pass. Was there ever an official withdrawal of that idea, or did they just stop printing maps?

The alignment adoption for 190 has never been rescinded.  Not that there is much of a point with Sherman Pass being around.  Having Horseshoe Meadows Road still in the state highway system probably would bring it more mainstream attention.  I'm surprised it isn't more notable given it crosses the 10,000 foot elevation mark.

Haiwee, at 8200 feet, might remain open while Sherman is closed. A Horseshoe Meadow route, on the other hand, would climb to almost 11000 feet.

True, Mulkey Pass was from a more ambitious time.  Those planners wanted to top the Tioga Road and had some bigger backers before the Great Depression hit.

[andy3175]

I found some additional information on the allocation of federal funding for the SR 58/I-40 corridor study from California Senator Alex Padilla's webpage:
 https://www.padilla.senate.gov/newsroom/press-releases/padilla-schiff-announce-over-53-million-to-repair-highways-roads-across-california/

Kern County's I-40 Corridor Extension Project — $1.37 million: This project will invest in studying the feasibility, safety and economic benefits of a potential extension of the I-40 corridor along State Route 58 in Kern County.

Based on the limited information provided upthread, the applicant seems to be Kern County (and not the Council of Governments nor the City of Bakersfield). I did find a link to the letter in support issued by the Kern County Board of Supervisors:
https://www.kerncounty.com/home/showpublisheddocument/22964/639057311544900000#search=state%20route%2058.

Upthread, there was some discussion about how controlled access could be achieved between SR 58 and SR 223 and Bealville Road. Here is a link to the 2011 study that provides alternatives, but none have been implemented. See  https://www.kerncog.org/wp-content/uploads/2009/10/SR_58-223_Interchange_2011.pdf for more.

There is also a letter in support for federal funding for a better connection between SR 58 and California City Boulevard: https://www.kerncounty.com/home/showpublisheddocument/23432/639089137795070000#search=state%20route%2058

Hope this helps... I'll keep looking to see what else is out there about this study.

[andy3175]

We don't often get a lot of activity on this board from folks outside the Southwest.  However, every time something related to possibly making CA 99 or CA 58 an Interstate it becomes all the rage.  Considering how many awesome roads we have in California in Nevada I don't know whether not to find that amusing or disappointing. 

Just different people want different things of an awesome road.  If you're a trucker or casual tourist, you might want them to be interstates.  For others, a twisty mountain road with an AADT you could count on the fingers of one hand might be just the ticket.

I'm mostly referencing what goes on in this hobby. I wouldn't lump many hobby regulars in the same league as "casual tourists."

Truly, I am glad for discussing both awesome rural roads and freeways. Max, I appreciate all the work you've done to share numerous California roads I've never had a chance to drive and to revisit those roads I've previously had the time to drive (due to work, my free time is in short supply, so my roadtrips have been limited in the last 10-15 years). We are truly lucky in this State to have such amazing driving opportunities. I hope to get back out there once I retire.

I also appreciate the discussion about whether it makes sense or not to replace SR 58 with I-40. My general sense is if the freeway meets standards and connects to the Interstate system, it should be considered for inclusion within the Interstate Highway System. While in that case I generally would prefer the signage to be changed to Interstate, there is precedence for not installing Interstate Highway signs. US 50 in Maryland (hidden I-595) is a good example of this. A lot depends on whether there is local interest in adding a route to the Interstate Highway System, and there is clearly interest in this (at least politically) in Bakersfield. To me, this is why SR 99 and SR 58 have come up as possible future Interstate Highway corridors. But I appreciate Scott, Rothman, and CaHwyGuy offering their approaches to this topic. I've learned quite a bit following their replies back and forth. It will be interesting to see how this study goes and whether it has any particular recommendation.

Thanks,
Andy

[splashflash]

And Scott Parker had his moniker as I-40, and I think mentioned somewhere that he hoped it would be extended too. Here is one of his discussions way back. https://www.aaroads.com/forum/index.php?board=29.0

We don't often get a lot of activity on this board from folks outside the Southwest.  However, every time something related to possibly making CA 99 or CA 58 an Interstate it becomes all the rage.  Considering how many awesome roads we have in California in Nevada I don't know whether not to find that amusing or disappointing. 

Just different people want different things of an awesome road.  If you're a trucker or casual tourist, you might want them to be interstates.  For others, a twisty mountain road with an AADT you could count on the fingers of one hand might be just the ticket.

I'm mostly referencing what goes on in this hobby. I wouldn't lump many hobby regulars in the same league as "casual tourists."

Truly, I am glad for discussing both awesome rural roads and freeways. Max, I appreciate all the work you've done to share numerous California roads I've never had a chance to drive and to revisit those roads I've previously had the time to drive (due to work, my free time is in short supply, so my roadtrips have been limited in the last 10-15 years). We are truly lucky in this State to have such amazing driving opportunities. I hope to get back out there once I retire.

I also appreciate the discussion about whether it makes sense or not to replace SR 58 with I-40. My general sense is if the freeway meets standards and connects to the Interstate system, it should be considered for inclusion within the Interstate Highway System. While in that case I generally would prefer the signage to be changed to Interstate, there is precedence for not installing Interstate Highway signs. US 50 in Maryland (hidden I-595) is a good example of this. A lot depends on whether there is local interest in adding a route to the Interstate Highway System, and there is clearly interest in this (at least politically) in Bakersfield. To me, this is why SR 99 and SR 58 have come up as possible future Interstate Highway corridors. But I appreciate Scott, Rothman, and CaHwyGuy offering their approaches to this topic. I've learned quite a bit following their replies back and forth. It will be interesting to see how this study goes and whether it has any particular recommendation.

Thanks,
Andy

And Scott Parker had his moniker as I-40, and I think mentioned somewhere that he hoped it would be extended too and his avatar mirrored his wishes.  Here is his chiming in on mileage signing if an extension were to occur. https://www.aaroads.com/forum/index.php?msg=2659540
https://www.aaroads.com/forum/index.php?action=profile;u=352

[cahwyguy]

There is also a letter in support for federal funding for a better connection between SR 58 and California City Boulevard: https://www.kerncounty.com/home/showpublisheddocument/23432/639089137795070000#search=state%20route%2058

Thanks for the finding the information. I'll be capturing it in my next round of updates. Regarding the California City connection. I think this provides more details:

https://www.kerncog.org/wp-content/uploads/2021/11/Kern-Co-18-FY-24-25-Operational-Improvements-Desert-Sage-Av-California-City.pdf

The reference to the California City interchange is not the Western one, but the Eastern one that doesn't have the fancy interchange. The clue is the line in the letter: "Federal investment would allow the roadway to be paved and brought into service, providing safe and reliable access to Edwards Air Force Base". The Sage Ave improvements document notes as justification: "Edwards Air Force Base (AFB) is the second-largest US Air Force base in California with day-to-day operations and support for over 10,000 military, federal civilian, and contract personnel, many of which commute from California City. Edwards AFB is located two miles southeast of this project whose access is provided from SR-58 at the Northgate Boulevard interchange"

Daniel

[cahwyguy]

And Scott Parker had his moniker as I-40, and I think mentioned somewhere that he hoped it would be extended too and his avatar mirrored his wishes.  Here is his chiming in on mileage signing if an extension were to occur. https://www.aaroads.com/forum/index.php?msg=2659540
https://www.aaroads.com/forum/index.php?action=profile;u=352

I'm not sure how "In the unlikely -- at least in the near term -- event that I-40 gets extended west through Bakersfield to I-5" translates to hoping it would be extended. But Caltrans will do what Caltrans will do, and current Caltrans seems loath to deal with AASHTO for anything. If they can't be bothered to get I-210 corrected, extending I-40 signage is even lower in the stack. They may very well upgrade the route to Interstate-ish standards, and just not worry about the number.

[pderocco]

There is also a letter in support for federal funding for a better connection between SR 58 and California City Boulevard: https://www.kerncounty.com/home/showpublisheddocument/23432/639089137795070000#search=state%20route%2058

I don't know what the AADT is on CCBlvd, but when I drive that part of 58, I almost never see anyone turning there, so it's probably reasonable to connect it to Northgate Blvd's interchange. But I wonder how the users of that will feel about the extra four miles they have to drive if they're headed west on 58. It's similar to the alternative #4 for Bealville/CA-223, which connects Bealville to the proposed CA-223 interchange, also a reasonable idea given the minimal traffic.

[FredAkbar]

There is also a letter in support for federal funding for a better connection between SR 58 and California City Boulevard: https://www.kerncounty.com/home/showpublisheddocument/23432/639089137795070000#search=state%20route%2058

I don't know what the AADT is on CCBlvd, but when I drive that part of 58, I almost never see anyone turning there, so it's probably reasonable to connect it to Northgate Blvd's interchange. But I wonder how the users of that will feel about the extra four miles they have to drive if they're headed west on 58. It's similar to the alternative #4 for Bealville/CA-223, which connects Bealville to the proposed CA-223 interchange, also a reasonable idea given the minimal traffic.

Wouldn't most people heading west use the other direction of CCBlvd anyway? The part that crosses CA-14 north of Mojave. Or if they don't already, the extra 4 miles added to the southern route might seal the deal.

[pderocco]

There is also a letter in support for federal funding for a better connection between SR 58 and California City Boulevard: https://www.kerncounty.com/home/showpublisheddocument/23432/639089137795070000#search=state%20route%2058

I don't know what the AADT is on CCBlvd, but when I drive that part of 58, I almost never see anyone turning there, so it's probably reasonable to connect it to Northgate Blvd's interchange. But I wonder how the users of that will feel about the extra four miles they have to drive if they're headed west on 58. It's similar to the alternative #4 for Bealville/CA-223, which connects Bealville to the proposed CA-223 interchange, also a reasonable idea given the minimal traffic.

Wouldn't most people heading west use the other direction of CCBlvd anyway? The part that crosses CA-14 north of Mojave. Or if they don't already, the extra 4 miles added to the southern route might seal the deal.

Yes, I agree. It's only a few people who live in SE Cal City and/or work at the Hyundai/Kia Proving Grounds.

Too bad CCBlvd didn't continue diagonally to 140th, and then straight down to the existing interchange. Or maybe all the way into North Edwards.

I always wondered how much it cost to scratch all those little dirt roads into the desert, especially further out 20 Mule Team Pkwy. What a waste.

[Max Rockatansky]

Speaking of that 140th exit I stopped at that EZ Trip twice coming and going from Clark County.  That place doesn't have the typically low EZ Tripp gas prices I'm accustomed to but has way better access to 58 than the Loves in Boron.

[FredAkbar]

If they're going to route traffic to 140th, I think they'd better add a cloverleaf at 140th & Rosewood

[cahwyguy]

People seem to have missed the quote of mine (below). The CCBlvd interchange they are talking about is the eastern one, and they are then talking about improving Sage Road to give better access to Edwards (for folks going E)

There is also a letter in support for federal funding for a better connection between SR 58 and California City Boulevard: https://www.kerncounty.com/home/showpublisheddocument/23432/639089137795070000#search=state%20route%2058

Thanks for the finding the information. I'll be capturing it in my next round of updates. Regarding the California City connection. I think this provides more details:

https://www.kerncog.org/wp-content/uploads/2021/11/Kern-Co-18-FY-24-25-Operational-Improvements-Desert-Sage-Av-California-City.pdf

The reference to the California City interchange is not the Western one, but the Eastern one that doesn't have the fancy interchange. The clue is the line in the letter: "Federal investment would allow the roadway to be paved and brought into service, providing safe and reliable access to Edwards Air Force Base". The Sage Ave improvements document notes as justification: "Edwards Air Force Base (AFB) is the second-largest US Air Force base in California with day-to-day operations and support for over 10,000 military, federal civilian, and contract personnel, many of which commute from California City. Edwards AFB is located two miles southeast of this project whose access is provided from SR-58 at the Northgate Boulevard interchange"

Daniel

[Max Rockatansky]

If they're going to route traffic to 140th, I think they'd better add a cloverleaf at 140th & Rosewood

Truly it would be the first actual Dirt Super Highway.

[NE2]

If they're going to route traffic to 140th, I think they'd better add a cloverleaf at 140th & Rosewood

Truly it would be the first actual Dirt Super Highway.

It would be a great Path for Goats.

[Max Rockatansky]

If they're going to route traffic to 140th, I think they'd better add a cloverleaf at 140th & Rosewood

Truly it would be the first actual Dirt Super Highway.

It would be a great Path for Goats.

The goats have their paths already in western Sierra Nevada and Santa Cruz Mountains.  This is more intended to be a Big Horn Sheep expressway.

[FredAkbar]

I didn't see direct discussion of it in this thread, but the Keene Pavement Project will combine the repaving and climbing lane work that has been discussed here.

It's going out for bid this summer. But it's not clear when construction is expected to begin. This recent article says 2028, while the District 9 project page says summer 2027. Both pages suggest it will take 3 years, but they are doing it in sections so individual sections could be finished sooner than that.

I assume all the environmental review is already complete?

[The Ghostbuster]

The W. Main St. (old US 66/91) interchange in Barstow is still unnumbered. It would be Exit 233 if it were numbered. Perhaps the next signage replacement will finally give the interchange a number.

[Max Rockatansky]

The W. Main St. (old US 66/91) interchange in Barstow is still unnumbered. It would be Exit 233 if it were numbered. Perhaps the next signage replacement will finally give the interchange a number.

Those are last generation button copy signs.  They'll be there for a couple more decades.