One-county state highways

[DandyDan]

How many state routes are entirely within Cherry Co, NE?

Five: R16C, R16D, S16A, S16B, S16F

No mainline routes, just two recreation routes and three spur routes.

I always forget about the recreation roads in Nebraska, probably because they are not in the official state log.  They almost shouldn't count, since they are only in state parks and I don't offhand know of any which might be in two counties (perhaps Indian Cave State Park, the spur road for which straddles the Nemaha-Richardson County border).

[vdeane]

NYSDOT Region 7:

Clinton:
-NY 9B
-NY 22B
-NY 189
-NY 191
-NY 276 (part of which is just feet away from Quebec)
-NY 314 (1592628...)
-NY 422
-NY 456

Franklin:
-NY 122
-NY 186

Jefferson:
-NY 3A
-NY 12E
-NY 12F
-NY 180
-NY 178
-NY 193
-NY 283
-NY 289
-NY 342
-NY 411

Lewis:
-NY 410

St. Lawrence:
-NY 11B
-NY 11C
-NY 37B
-NY 56
-NY 58
-NY 68
-NY 72
-NY 310
-NY 345
-NY 420
-NY 421

To get technical, NY considers all routes state routes.  Interstates are ##I and US routes are ##U.

Not true.  All but two US routes have no suffix, since NY avoids duplicating them.  US 2 (entirely in Clinton County in the village of Rouses Point) is 2U, US 15 is 99I (really), and the others are just themselves.

[PHLBOS]

Essex County, Massachusetts:
22
35
97
108
114
127
127A
129A
213
286

Add 150 to your list.  Granted, it goes into NH but so do 97, 108 & 286.

And of course, 128 would be on that list if many had their way. 

Touche.

Chester County, PA (I'm sure I've missed a few)
-PA 926

Part of PA 926 actually runs along the county line, just west of PA 352.  One side's (westbound) in Westtown, Chester County; the other side's (eastbound) in Thornbury, Delaware County.

[mgk920]

Another one I can think of is WI 116, entirely in Winnebago County.

The now decommissioned WI 150 was also entirely in Winnebago County.

Mike

[wxfree]

Texas highways:
54 in Culberson County
65 Chambers
112 Eastland
166 Jeff Davis
128 Andrews (continues across state line as NM 128)
179 Freestone
225 Harris
258 Wichita
267 Erath (under construction-first half of US 67 bypass around Dublin)
309 Navarro
334 Henderson
339 Duval (designation file lists only Duval County, but it may extend a few feet into Brooks County)
337 and 254 Palo Pinto
352 Dallas

[builder_J]

A few more to add to the list:

Missouri:

Clay County:
MO 1
MO 269 (may be decommissioned?)
MO 283

Jackson County:
MO 12
MO 78
MO 150
MO 350

Pettis County:
MO 765

Boone County:
MO 163
MO 740
MO 763

Buchanan County:
MO 752
MO 759

Kansas:

Cowley County:
K-360

[NWI_Irish96]

Indiana: (not including multi-segment highways where one segment is only in one county)

IN 51 - Lake County
IN 53 - Lake County
IN 69 - Posey County

IN 103 - Henry County
IN 106 - Marshall County
IN 115 - Wabash County
IN 117 - Marshall County
IN 126 - Tippecanoe County
IN 127 - Steuben County
IN 128 - Madison County
IN 134 - Marion County
IN 142 - Morgan County
IN 143 - Pulaski County
IN 148 - Dearborn County
IN 149 - Porter County
IN 152 - Lake County
IN 154 - Sullivan County
IN 158 - Lawrence County
IN 166 - Perry County
IN 168 - Gibson County

IN 201 - Wells County
IN 211 - Harrison County
IN 212 - Laporte County
IN 225 - Tippecanoe County
IN 232 - Madison County
IN 235 - Jackson County
IN 240 - Putnam County
IN 241 - Knox County
IN 245 - Spencer County
IN 249 - Porter County
IN 258 - Jackson County
IN 261 - Warrick County
IN 263 - Warren County
IN 264 - Dubois County
IN 265 - Clark County
IN 269 - Posey County

IN 301 - Wells County
IN 312 - Lake County
IN 332 - Delaware County
IN 340 - Clay County
IN 341 - Fountain County
IN 342 - Vigo County
IN 352 - Benton County
IN 357 - Gibson County
IN 364 - Pike County

IN 403 - Clark County
IN 441 - Knox County
IN 443 - Tippecanoe County
IN 445 - Greene County
IN 458 - Lawrence County
IN 462 - Harrison County

IN 520 - Porter County
IN 524 - Wabash County
IN 526 - Tippecanoe County
IN 558 - Daviess County

IN 641 - Vigo County
IN 650 - Martin County

IN 727 - Steuben County

IN 827 - Steuben County

IN 912 - Lake County
IN 930 - Allen County
IN 933 - Saint Joseph County

[Scott5114]

If I'm not mistaken, MO 744 is entirely within Greene County.

[brownpelican]

Too damn many in Louisiana, but here are the ones in my area:

* Washington Parish - La. 60, La. 62, La. 424, La. 430, La 430 Spur, La. 436, La. 436-1, La. 438, La. 439, La. 1069, La. 1055, LA. 1056, La. 1071, La. 1072, La. 1073, La. 1074, La. 1075, La. 3124

* Tangipahoa Parish - La. 443, La. 445, LA 1049 La. 1050, La. 1053, La. 1054, La. 1055, La. 1057, La. 1061, La. 1062, La. 1063, La 1065, La. 1067, La. 3158, La. 3234, La. 3260.

* St. Tammany Parish - La. 36, La. 41, La. 41 Spur, La. 59, La. 433, La. 434, La. 435, La 435 Spur, La. 1077, La. 1078, La. 1080, La. 1081, La. 1082, La. 1085, La. 1087, La. 1088, La. 1089, La. 1090, La. 1091, La. 1093,  La, 1129, La. 3081, La. 3228.

[thenetwork]

Cuyahoga County (Cleveland), OH:

Street names the route travels along are in parenthesis:

SR-17 (Brookpark/Granger/Libby)
SR-175 (East 260th/Richmond)
SR-291 (Henry Ford Bl./Engle)

and my personal favorite with 9 name changes within it's 14-mile alignment:

SR-237 (W. Clifton/Riverside/Rocky River/Berea Freeway/Front/W. Bagley/Mulberry/Henry/Prospect).

And then there's I-490

[The High Plains Traveler]

Without going through what (for New Mexico especially) would be an excruciating process, I can identify the longest single-county routes:

New Mexico: NM-12 (74 miles, Catron County)
Colorado: CO-318 (62 miles, Moffat County)

[agentsteel53]

Without going through what (for New Mexico especially) would be an excruciating process, I can identify the longest single-county routes:

New Mexico: NM-12 (74 miles, Catron County)
Colorado: CO-318 (62 miles, Moffat County)

that's an interesting question in general.  my guess for CA is route 247: 78 miles, entirely in San Bernardino County. 

[sbeaver44]

Harrisburg, PA Area:

York County (Interestingly, 12 of these are exits off I-83 - the first 11 and PA 851)

• 124
• 177
• 181
• 182
• 214
• 216
• 238
• 262
• 295
• 382
• 392
• 425
• 516
• 616
• 624
• 851
• 921

Cumberland County

• 174
• 465
• 581
• 944

Adams County

• 97*
• 394

*There is another PA 97 in Erie County, but these may or may not be considered the same route.


Dauphin County

• 39

Perry County

• 17

Lebanon County

• 117
• 343
• 934

Franklin County

• 163
• 316
• 416
• 433
• 914
• 995

Lancaster County

• 722
• 772
• 999

Almost...

• 849 - Only the last 1000 feet or so eastbound enter Dauphin County, otherwise Perry.

[Michael]

To get technical, NY considers all routes state routes.  Interstates are ##I and US routes are ##U.

Not true.  All but two US routes have no suffix, since NY avoids duplicating them.  US 2 (entirely in Clinton County in the village of Rouses Point) is 2U, US 15 is 99I (really), and the others are just themselves.

Now that I think about it, you're right.  I was thinking about Reference Markers on US 15 that have 15U on them.  My closest US route is US 20, and I'm normally on the US 20/NY 5 duplex, which has Reference Markers for NY 5, so I don't see US 20 Reference Markers that often.

As for 99I Reference Markers, I thought someone posted a picture on the forum, but I can't find it.  I did find a post of mine from 2011 where I mentioned seeing one back in 2008.

[kphoger]

If I'm not mistaken, MO 744 is entirely within Greene County.

Ha! I had actually thought of that one, but was too lazy at the time to bother looking it up.  Of course, there are a bazillion secondary state routes in Missouri that don't cross county lines.....  Has anyone mentioned MO-376 yet?

[Scott5114]

If I'm not mistaken, MO 744 is entirely within Greene County.

Ha! I had actually thought of that one, but was too lazy at the time to bother looking it up.  Of course, there are a bazillion secondary state routes in Missouri that don't cross county lines.....  Has anyone mentioned MO-376 yet?

Another Greene County one–MO 360, which is the portion of the James River Freeway that is not US 60.

[Sonic99]

Without going through what (for New Mexico especially) would be an excruciating process, I can identify the longest single-county routes:

New Mexico: NM-12 (74 miles, Catron County)
Colorado: CO-318 (62 miles, Moffat County)

that's an interesting question in general.  my guess for CA is route 247: 78 miles, entirely in San Bernardino County.

Arizona 64, 108 miles. Although the only potential kink in that is does the highway "officially" still run inside the Grand Canyon National Park? Or does it "end" at each park entrance?

Also, when it comes to Arizona highways, IIRC Arizona 989 is less than one mile long, nor is it signed in ANY way. Basically it was designated a State Highway so that a large bridge could be built on the State's dime, not the local municipality.

[The High Plains Traveler]

Without going through what (for New Mexico especially) would be an excruciating process, I can identify the longest single-county routes:

New Mexico: NM-12 (74 miles, Catron County)
Colorado: CO-318 (62 miles, Moffat County)

that's an interesting question in general.  my guess for CA is route 247: 78 miles, entirely in San Bernardino County.

Arizona 64, 108 miles. Although the only potential kink in that is does the highway "officially" still run inside the Grand Canyon National Park? Or does it "end" at each park entrance?

Also, when it comes to Arizona highways, IIRC Arizona 989 is less than one mile long, nor is it signed in ANY way. Basically it was designated a State Highway so that a large bridge could be built on the State's dime, not the local municipality.

I believe AZ-80 is entirely located within Cochise County and is 119 miles long (if I read my atlas correctly).

[mjb2002]

I missed one in Aiken County. SC 126 (BELVEDERE-CLEARWATER RD).

[bassoon1986]

Some LA ones from my stomping grounds:

Caddo Parish:
LA 168
LA 170
LA 173
LA 530
LA 538
LA 767
LA 3049
LA 3149
LA 3094
LA 3132
LA 3036
LA 526
LA 523
LA 525
LA 3231

Bossier Parish:
LA 537
LA 3
LA 527
LA 612
LA 614
LA 3227
LA 3105
LA 185
LA 782-1
LA 782-2
LA 72
LA 162
LA 529

Desoto Parish
LA 3276
LA 5
LA 172
LA 764
LA 765
LA 3015
LA 510
LA 3248
LA 522
LA 513
LA 346
LA 512
LA 481 (unless it straddles the parish line)
LA 763
LA 3103
US 84 Bus

[corco]

I believe AZ-80 is entirely located within Cochise County and is 119 miles long (if I read my atlas correctly).

Yes

Arizona 64, 108 miles. Although the only potential kink in that is does the highway "officially" still run inside the Grand Canyon National Park? Or does it "end" at each park entrance?

It's maintained by NPS but ADOT does still consider it a part of the  state highway system and mileposts it as such, per the 2007 SHS Log

[31E]

One-county state highways in Tennessee include TN 374, TN 238 and TN 237 in Montgomery County, TN 155 and TN 255 in Davidson County, and TN 397, TN 441 and TN 252 in Williamson County.

[hotdogPi]

Essex County, MA:

22
35
97 in Massachusetts
114
127
127A
129A
213

[dgolub]

New York has a ton of single-county state routes.  Long Island has already been covered here, so I'll cover some of the other counties in the area.

Richmond: NY 440 (although it becomes a New Jersey route)
Bronx: I-695, I-895
Westchester: NY 35, NY 100, NY 100A, NY 100B, NY 100C, NY 116, NY 117, NY 119, NY 120, NY 120A (well sort of, since it goes into Connecticut), NY 123, NY 124, NY 125, NY 127, NY 128, NY 129, NY 132, NY 133, NY 134, NY 137, NY 138, NY 139, NY 141, NY 172, NY 433, NY 448
Rockland: NY 45, NY 59, NY 303, NY 304, NY 306

[Rob Adams]

Putnam County, NY has NY 403, NY 301, NY 311, NY 164, and NY 312. NY 6N is close, but no cigar as it dips into Westchester County.