What states use the blue pentagon shield for county roads?

[KCRoadFan]

I was just thinking about the MUTCD blue pentagon shield for county roads, with regards to which states use it, and how common or widespread they are within that state. Here is a list of states that I know use the pentagon shield at least to some extent - at least, I'm pretty confident about that:

Alabama
Arkansas
California (some counties)
Colorado (some counties)
Florida
Illinois (a couple counties in the Chicago suburbs; not sure about downstate)
Iowa
Kansas (Douglas and Leavenworth, for sure; don't know about other counties)
Michigan (some counties)
Minnesota
Missouri (rare, but I have seen them on occasion)
New Jersey
New Mexico
New York (some counties)
Wyoming

I'm pretty sure I got those right. Anyway, have you seen the county road pentagons used in any other states aside from the ones I mentioned above?

I know that some states sign county roads differently (the circles for "fraction roads" in WV, for example, or the white squares for lettered "county trunk" highways in Wisconsin), while some other states instead have "secondary" state-maintained roads that serve a function roughly equivalent to that of county roads (states such as MT, NC, PA, TN, and VA come to mind in that regard).

[froggie]

Not all counties in Minnesota use the blue pentagon.  Some use the white square, while others use BOTH the blue pentagon and white square.

Louisiana is rare, but there are at least a couple parishes where I have seen blue pentagons.

There are a few counties in Mississippi where one will see the blue pentagon...namely those counties where the county decided to number their roads instead of name them.

[Max Rockatansky]

I've seen them from time to time in Arizona.

[US 89]

https://www.aaroads.com/forum/index.php?topic=26062.0

Most counties in Utah don’t bother to number their roads. Of the ones that do, some have their own shield (Uintah, San Juan), but you’ll find blue pentagons in a few Utah counties. The most prolific use of these signs is in Duchesne County, but I’ve seen them in Daggett, Carbon, Washington, and maybe a couple others as well.

More common is the federal aid “fake pentagon” I described in the other thread, which commonly appears at the beginning or end of federal-aid routes in some rural areas of the state.

[nexus73]

They show up in Oregon but are not that common it seems.

Rick

[DandyDan]

Minnehaha County in South Dakota uses blue pentagons. I can't begin to tell you whether anywhere else in South Dakota does, being I haven't been there since 2012.

[wanderer2575]

They're seen in Michigan mostly on routes designated as part of an intercounty route system.  Several counties never designated any routes as part of the system and a lot of any existing signing is old and neglected; the state does not contribute any funds to the counties to maintain signage, but designated routes still are shown on the official state map.  Route numbers are a letter-number combination, with the letter corresponding to a section of the state.

Most other county route markers are black-on-white rectangular shields, although there are some that use pentagon shields.  You can tell the latter are not part of the intercounty system because the route numbers don't include a letter.

[webny99]

New York (some counties)

That's accurate.
To my knowledge, there are no counties in New York that use any other county route signage besides the blue pentagon. It's either the blue pentagon, or unsigned.

[NWI_Irish96]

Indiana does not use them, but the Toll Road uses it on signs for the CR 17 exit in Elkhart County.

[vdeane]

New York (some counties)

That's accurate.
To my knowledge, there are no counties in New York that use any other county route signage besides the blue pentagon. It's either the blue pentagon, or unsigned.

Depends on what you count as "unsigned".  In Ontario County, the roads have no other official name, so they're signed on street blades as "County Route #".  Other counties also mention the county route numbers on street blade signs, including Schenectady County.

Until a few years ago, Franklin County used squares.  Ulster, Orange, and Erie Counties also used to have their own shields.

[GaryV]

They're seen in Michigan mostly on routes designated as part of an intercounty route system.  Several counties never designated any routes as part of the system and a lot of any existing signing is old and neglected; the state does not contribute any funds to the counties to maintain signage, but designated routes still are shown on the official state map.  Route numbers are a letter-number combination, with the letter corresponding to a section of the state.

Most other county route markers are black-on-white rectangular shields, although there are some that use pentagon shields.  You can tell the latter are not part of the intercounty system because the route numbers don't include a letter.

Here's a real interesting county pentagon in Otsego County, Michigan:  https://www.google.com/maps/@45.1846888,-84.6727284,3a,22.1y,230.01h,87.79t/data=!3m6!1e1!3m4!1su3xradV8y_plI2Jot0bj5A!2e0!7i16384!8i8192?hl=en

It's north of Vanderbilt on Old US 27, just south of the C-28 intercounty highway intersection.

[Scott5114]

The only numbered county route I know of in Oklahoma is Ottawa CR 137 (old SH-137), which is not signed with a pentagon. For the most part, county roads in Oklahoma form a grid that are named/numbered like regular urban streets, and signed as such.

There are some county pentagons in Oklahoma, though–but they're used as parking signs outside the Logan County Courthouse! Clearly they had some reason to order some blank pentagons for some reason, that got repurposed into these, but why?

[ftballfan]

They're seen in Michigan mostly on routes designated as part of an intercounty route system.  Several counties never designated any routes as part of the system and a lot of any existing signing is old and neglected; the state does not contribute any funds to the counties to maintain signage, but designated routes still are shown on the official state map.  Route numbers are a letter-number combination, with the letter corresponding to a section of the state.

Most other county route markers are black-on-white rectangular shields, although there are some that use pentagon shields.  You can tell the latter are not part of the intercounty system because the route numbers don't include a letter.

Benzie County, which isn't part of the intercounty system, switched from a white-on-green square (as seen on Karlin Rd (CR 700) in 2009) to the blue pentagon (as seen on Joyfield Rd (CR 602) in 2015). Side note: there is a loose grid of county routes (mostly in the 600s) in Antrim, Benzie, Grand Traverse, Kalkaska, and Leelanau counties.

[tdindy88]

Speaking of Michigan, I came across this white pentagon highway shield in Marquette yesterday. It's in the far left part of the picture.

[STLmapboy]

Missouri has a few on US-67 north of Poplar Bluff. Other times, the lettered routes do the job just fine.

[bulldog1979]

Speaking of Michigan, I came across this white pentagon highway shield in Marquette yesterday. It's in the far left part of the picture.

Marquette County uses black and white squares. MDOT has done some work around here the past few years, and either they (or a contractor) has put up pentagons. CR 545 off M-94 on the east side of KI Sawyer has blue and yellow pentagons, while the CR 492 signs off US 41/M-28  in Negaunee and Marquette Township are those black and white pentagons.

[Bickendan]

They show up in Oregon but are not that common it seems.

Rick

I think Douglas County's the only one I've seen using them.

[GaryA]

In Nevada, it's used for the county-maintained part of the 215 beltway ("CC-215", for Clark County).  I don't know whether there are any other county highways in Nevada.

[KeithE4Phx]

I've seen them from time to time in Arizona.

Yavapai, Mohave, and Coconino Counties use them.  Maricopa and Pinal Counties do not, although some Maricopa County highways have numbers, such as MC 85 being the former AZ 85 prior to I-10 being completed.  MC 238 is another.  It's the part of what should eventually become AZ 238 that's in Maricopa County between the county line and Gila Bend (I think negotiations with ADOT are still ongoing, although the road has finally been paved, AFAIK).  Neither are signed with a blue pentagon or anything else.

Not sure about the other counties. 

[CoreySamson]

Brazoria County in Texas installed some pentagons when they rebuilt and extended CR 220 around 7 years ago:

https://www.google.com/maps/@29.1242927,-95.4304217,3a,26.1y,59.9h,89.84t/data=!3m6!1e1!3m4!1sTCA73-dJxlaZc50g4ahFGA!2e0!7i13312!8i6656

The odd thing is Brazoria County normally uses a different county shield, a green square which looks like this:

https://www.google.com/maps/@29.1732724,-95.4384028,3a,15y,340.96h,86.57t/data=!3m6!1e1!3m4!1sdSBUp5G0WMfQ-_LUwpVGtA!2e0!7i16384!8i8192

From what I've seen, no other green squares around the county have been replaced with pentagons since they rebuilt CR 220, so I'm wondering if this is a contractor error. Of course it may just be that the CR 220 shields were the only ones needing replacement. I'll see if I can find any other pentagons to see if this is a county-wide thing.

[Katavia]

North Carolina doesn't have county routes, but Charlotte does have City Route 4 - it's a route signed with a green pentagon with the city "crown" logo at the top, replacing any "County" notation.

[Avalanchez71]

I have seen the county pentagons in Tennessee in Meigs County and in Polk County.  I think there may be some in McMinn County as well.  They only seem to be at the intersection of the main highway and act more like sign blades.

[machias]

I've seen them away from Chicagoland in Illinois, Livingston County comes to mind.

[paulthemapguy]

Illinois counties that use the blue pentagon include Winnebago, McHenry, Lake, DuPage, Kane (inconsistently), DeKalb (starting recently), Kendall (starting last year), Kankakee, Iroquois, Livingston, McLean, Logan, Macon, McDonough, Knox, Peoria, Woodford, LaSalle, Bureau, Rock Island (who uses letters instead of numbers like Wisconsin), Henry, St. Clair, Sangamon, Champaign, Vermilion, Piatt, Douglas, Coles, Edgar, Fayette, Effingham, Clinton, Christian, Cumberland, Mason, Menard and DeWitt.  See Bill Burmaster's page.

(Clay County uses the white square like some places in Minnesota.)
Edit: Forgot to mention Warren, and forgot to mention Cook (sporadically).

[3467]

Also in Warren and McDonough sporadically. Schylur  used really nice city type road signs. Most counties use little city like road signs with the 911 numbers.