County roads whose numbers reflect their status as former US or state highways

[US 89]

Jefferson County 73 used to be CO73.

Is that true of Jefferson CR 93 as well? I've never thought about that before, but it would make sense as it's pretty much aligned with existing SH 93 north of Golden.

[pderocco]

According to cahighways.org, California 78 was originally signed as CR-S78 in Imperial Co from Brawley to almost to Blythe before the paved state highway route was constructed around 1970. That's sort of the opposite situation.

There are also a couple of signed county routes in California that are extensions of state highways with the same number, including CA-132 to CR-J132, and CA-59 to CR-J59.

California assigns its numbered county routes more or less starting with 1 in each zone (where each zone uses a different letter prefix), so they have to break the rules in order to use a county route number to commemorate a state or US route. They did this with US-66 and US-80, as others have noted.

[theroadwayone]

There's also a large number of county routes north of Sacramento that are CR 99 or CR 99W.

[DandyDan]

When US 61 got truncated to central Minnesota, its old route south of Duluth usually became CR 61.

The counties took over most of the old route (except MN 361) before it was truncated.

Anoka/Ramsey CSAH 10
Lake/St. Louis CSAH 61 (the expressway was also built while still US 61)
Clay CSAH 52
Hennepin CSAH 112 is old US 12 through Orono and Long Lake
most of old US 169 in Shakopee is now CSAH 69 this might just be a coincidence

Somehow, you failed to mention how much of old MN 101 is now Hennepin County 101. I believe former MN 152 is now Hennepin County 152.

Dakota County 56 used to be MN 56.

OTOH, it's probably not that well known that old US 16 in Faribault County is now Faribault County 16

[catch22]

Otsego County, Michigan - the former US-27 is now Old 27, complete with county road shields.

https://goo.gl/maps/bPHRUZQ1xswxXq6RA

[formulanone]

Others in Alabama include 138 and 106 (which changes from SR 106 at a county line).

Florida is full of a shit ton of these since the County Roads generally retain State Road numbers.

I tried counting them one day, and I found over 300 of them. This is not a definitive number, since some alternates and post-1977 county routes may have been numbered to "fit the grid". Throw in an additional clean-up/renumbering scheme in 1983, and things get a little tough to track.

[JayhawkCO]

Jefferson County 73 used to be CO73.

Is that true of Jefferson CR 93 as well? I've never thought about that before, but it would make sense as it's pretty much aligned with existing SH 93 north of Golden.

Yep. According to the now somewhat defunct Colorado Highways site:

History:
SH 93 is an original 1920s state highway, but at first it went from Morrison north along the hogback road to Golden. It was paved by 1939, and that same year it was extended north to Marshall. By 1954 it went only from Marshall to Boulder, and wasn't paved. By 1955 SH 93 was extended south to SH 72, and was paved. It remained that way until 1984, when it was extended south to Golden, via Washington Street, to SH 58. The west Golden bypass, making SH 93 hook up with the US 6/SH 58 intersection, was opened about 1992.

[bulldog1979]

Otsego County, Michigan - the former US-27 is now Old 27, complete with county road shields.

https://goo.gl/maps/bPHRUZQ1xswxXq6RA

There are a few more in Michigan that I can name off the top of my head. Former M-186 in Delta County is now CR 186. Former M-135 in Luce County is CR 135 (and H-33), and former M-98 is listed as CR 98 and CR 498. (Of the two, I think CR 498 is more correct as the county roads in several counties follow a common numbering scheme.) Former M-76 is also named Old 76.

In terms of the reverse, M-183 was CR 483, and the continuation south of Fayette State Park still has that number, and M-553 was CR 553 and inherited the number unchanged.

[JayhawkCO]

Looks like there are some more in CO I didn't think of off-hand:
Ouray CR23 used to be CO23
San Juan CR110 used to be CO110
Routt CR129 used to be CO129 (decommissioned somewhere around 1953)

[Bitmapped]

Across much of northern Ohio, US 30's original two-lane alignment is now CR 30A or CR 330.

[TheHighwayMan3561]

When US 61 got truncated to central Minnesota, its old route south of Duluth usually became CR 61.

The counties took over most of the old route (except MN 361) before it was truncated.

Anoka/Ramsey CSAH 10
Lake/St. Louis CSAH 61 (the expressway was also built while still US 61)
Clay CSAH 52
Hennepin CSAH 112 is old US 12 through Orono and Long Lake
most of old US 169 in Shakopee is now CSAH 69 this might just be a coincidence

Somehow, you failed to mention how much of old MN 101 is now Hennepin County 101. I believe former MN 152 is now Hennepin County 152.

Dakota County 56 used to be MN 56.

OTOH, it's probably not that well known that old US 16 in Faribault County is now Faribault County 16

In the beginning I thought the thread was only about US routes. A couple more:

Fillmore CSAH 44 is the former fairly short-lived extension of MN 44 from US 52 to US 63
Houston CSAH 289
Dakota CSAH 50 from I-35 to MN 3
Ramsey CSAH 96 from I-35W to US 61 (the remainder of MN 96 east of 61 will be dead soon too)
Hennepin CSAH 88 (this one is a double feature: US 8 and then MN 88)

[cockroachking]

Some more from NY:
Greene CR-23B (Old alignment of NY-23) (Part is still NY-911V)
Steuben CR-333 (Old NY-333)
Chautauqua CR-380 (Old NY-380)
Delaware CR-17 (Old alignment of NY-17)
Sullivan CR-171 to 179 (Old alignments of NY-17)

[Dirt Roads]

In West Virginia, the "fractional" system is also used to reflect the former status of roads still maintained by WVDOH after the main road has been straightened or relocated.  My home county has a great example after the straightening of US-60 in the 1950s, all numbered as "fractionals" from 60/11 to 60/20.  All of these are wiggly parallel to the main road (listed east to west).

CR-60/11 (Courtwright Road)
CR-60/12 (Mynes Road/Obadiah Lane) north of US-60
CR-60/12 (Denali Drive) south of US-60, not quite connected to the other part
CR-60/13 (Hodges Road)
CR-60/14 (Appollo Lane)
CR-60/15 (Paul Road)
CR-60/16 (Stricklin Road)
CR-60/17 (part of a private driveway)
CR-60/18 (Black Jack Drive, includes another private driveway)
CR-60/19 (Stewart Road)
CR-60/20 (Henson Road, not shown on WVDOH maps)

Most of these sections of Old US-60 connect to branch roads that have still not been reconnected to US-60.  The "fractional" series below 60/11 and above 60/20 are traditional branch routes, some of which never connected to their parent (US-60 or Old US-60).  There are lots of similar examples in other parts of West Virginia.

[KCRoadFan]

I know that in Minnesota, County 45 runs parallel to I-35, beginning just north of Albert Lea and continuing north through Clarks Grove, Geneva, Owatonna, and Medford before meeting MN 60 and MN 3 in Faribault. I'm guessing that County 45 was once US 65 before that highway was truncated at Albert Lea - am I right in that regard? (If that's true, I wonder why they changed the first digit of the road number instead of just calling it County 65...)

[GenExpwy]

Some more from NY:
Greene CR-23B (Old alignment of NY-23) (Part is still NY-911V)
Steuben CR-333 (Old NY-333)
Chautauqua CR-380 (Old NY-380)
Delaware CR-17 (Old alignment of NY-17)
Sullivan CR-171 to 179 (Old alignments of NY-17)

A few more from Steuben County:
CR 115 (former US 15)
CR 121 (early 1930s NY 21)
CR 70A (former NY 70, but also forms a T with CR 70)

[LilianaUwU]

CR 25A in Troy, Ohio was US 25.

[zzcarp]

Another few in Colorado:

Jefferson County highway 126 used to be CO 126.
Douglas/Jefferson County 67 connects two dangling ends of CO 67.
Fremont County 67 is also former CO 67 from US 50 north of Florence to the county line (Teller County uses County 86 for its connection to the next dangling end of CO 67 in Victor).
Douglas County 105 is former CO 105, connecting the two CO 105 dangling ends from the El Paso County Line by Palmer Lake to Wolfensberger Road.
El Paso County 105 is also former CO 105 from I-25 to CO 83.

[DandyDan]

I know that in Minnesota, County 45 runs parallel to I-35, beginning just north of Albert Lea and continuing north through Clarks Grove, Geneva, Owatonna, and Medford before meeting MN 60 and MN 3 in Faribault. I'm guessing that County 45 was once US 65 before that highway was truncated at Albert Lea - am I right in that regard? (If that's true, I wonder why they changed the first digit of the road number instead of just calling it County 65...)

Yes, that is old US 65.

Also, County 46 goes through Freeborn and Mower Counties on the old US 16. I don't know why they didn't get the old US Route numbers.

[TheHighwayMan3561]

I know that in Minnesota, County 45 runs parallel to I-35, beginning just north of Albert Lea and continuing north through Clarks Grove, Geneva, Owatonna, and Medford before meeting MN 60 and MN 3 in Faribault. I'm guessing that County 45 was once US 65 before that highway was truncated at Albert Lea - am I right in that regard? (If that's true, I wonder why they changed the first digit of the road number instead of just calling it County 65...)

Yes, that is old US 65.

Also, County 46 goes through Freeborn and Mower Counties on the old US 16. I don't know why they didn't get the old US Route numbers.

In Chisago County, old US 61 is County 30. My possible reasonings:

1. Non-duplication - some counties may have already had an unrelated County X in use when the matching US X number was turned back. Most, if not all Minnesota counties do not care about state highway/county highway duplication; more than a few state highways intersect or formerly intersected their county number equivalent.

2. Driver clarity - not wanting people to think CSAH 16 is still the main highway, because I-90 is now

[froggie]

I know that in Minnesota, County 45 runs parallel to I-35, beginning just north of Albert Lea and continuing north through Clarks Grove, Geneva, Owatonna, and Medford before meeting MN 60 and MN 3 in Faribault. I'm guessing that County 45 was once US 65 before that highway was truncated at Albert Lea - am I right in that regard? (If that's true, I wonder why they changed the first digit of the road number instead of just calling it County 65...)

Yes, that is old US 65.

Also, County 46 goes through Freeborn and Mower Counties on the old US 16. I don't know why they didn't get the old US Route numbers.

In Chisago County, old US 61 is County 30. My possible reasonings:

1. Non-duplication - some counties may have already had an unrelated County X in use when the matching US X number was turned back. Most, if not all Minnesota counties do not care about state highway/county highway duplication; more than a few state highways intersect or formerly intersected their county number equivalent.

2. Driver clarity - not wanting people to think CSAH 16 is still the main highway, because I-90 is now

Furthermore, each county numbers things according to their own desire.  An example is old US 16 along the I-90 corridor.  It goes through 7 counties but has 6 different numbers (4, 35, 34, 26, 16, and 46).

[KCRoadFan]

Wisconsin, of course, has their lettered county roads - I wonder if there were any counties clever enough to designate a former alignment of a US or state highway with the equivalent letter in the alphabet (for example, labeling a former stretch of US 12 as County L, what with L being the 12th letter). Do you know of any such examples?

[NWI_Irish96]

Wisconsin, of course, has their lettered county roads - I wonder if there were any counties clever enough to designate a former alignment of a US or state highway with the equivalent letter in the alphabet (for example, designating a former stretch of US 12 as County L, what with L being the 12th letter). Do you know of any such examples?

I'd think L would be a former alignment of WI 50 and XII would be a former alignment of US 12.

[Big John]

Wisconsin, of course, has their lettered county roads - I wonder if there were any counties clever enough to designate a former alignment of a US or state highway with the equivalent letter in the alphabet (for example, designating a former stretch of US 12 as County L, what with L being the 12th letter). Do you know of any such examples?

I'd think L would be a former alignment of WI 50 and XII would be a former alignment of US 12.

Triple-letter county highways only use 3 of the same letter.

[pderocco]

There's also a large number of county routes north of Sacramento that are CR 99 or CR 99W.

I wouldn't call them county "routes" because they don't have shields, just ordinary street signs. The Central Valley is full of numbered roads, but they're called ROAD # (including in this case ROAD 99W, or sometimes HWY 99W). They're certainly not part of the California numbered county route system, which have yellow and blue pentagonal shields. It would be pretty cool if the old 99W (and the pieces of 99E that aren't now part of CA-99) were inducted into that system and given actual shields, but they would have to have A or E prefixes to be consistent with the rest of the numbered county routes.

[andarcondadont]

I know that in Minnesota, County 45 runs parallel to I-35, beginning just north of Albert Lea and continuing north through Clarks Grove, Geneva, Owatonna, and Medford before meeting MN 60 and MN 3 in Faribault. I'm guessing that County 45 was once US 65 before that highway was truncated at Albert Lea - am I right in that regard? (If that's true, I wonder why they changed the first digit of the road number instead of just calling it County 65...)

Yes, that is old US 65.

Also, County 46 goes through Freeborn and Mower Counties on the old US 16. I don't know why they didn't get the old US Route numbers.

Speaking of old 65, Anoka County 35 follows the alignment of pre-1960s MN 65 through Fridley and Spring Lake Park, locally known as Central Ave NE. A bit of a stretch for this thread, I'll admit.

Through its complicated history, MN 49 was a route that for the most part, ran between St Paul and then-US 8 (now signed as Anoka County 23, unrelated). As you can imagine, MN 49 became Anoka/Ramsey County 49 by the turn of the century.