Only state maintained highways count. (Yes, I know there are some oddities like the Illinois tollways not being state maintained, but please just use good judgement and don't ask questions you know the answer to.)
WI:
Northern is WI-13 at the Sand River in Bayfield County
Eastern is WI-42 at the Washington Island ferry dock
Southern is a tie between several if you aren't being picky, but if you factor in the curve of the earth, WI-32 at the Illinois border is the winner.
Western is the US-10 bridge over the St. Croix River at Prescott.
I appreciate you making it easy for me to figure out Illinois' northern most.
The northern most would be IL-137 (Sheridan Road) which becomes WI-32 going into Wisconsin.
The real northern most would be IL-35 in East Dubuque. (Thanks Brandon!)
The eastern most could possibly be IL-33 or US-50 down by Vincennes, Indiana.
The southern most would have to be US-62 south of Cairo.
The western most looks like it is US-24 through Quincy.
MO:
North: Tie, because most of the northern border lies on a single latitude. Taking in to account the Earth's curvature, it becomes Atchison County V.
South: Tie. Southern end of the Bootheel is at Lat 36 N. Candidates: I-55, US 61, MO 108, Supplemental Routes F, DD, TT, and NN.
East: US Routes 60 & 62.
West: Once again Atchison County V.
Quote from: thspfc on September 04, 2020, 10:16:42 PM
Southern is a tie between several if you aren't being picky, but if you factor in the curve of the earth, WI-32 at the Illinois border is the winner.
Quote from: ozarkman417 on September 04, 2020, 11:07:20 PM
North: Tie, because most of the northern border lies on a single latitude. Taking in to account the Earth's curvature, it becomes Atchison County V.
How are these at all related to the curvature of the earth? Theoretically, the state lines are supposed to follow an exact parallel of latitude - the only reason they don't necessarily run perfectly east-west is because 19th century surveyors could only be so accurate.
(excluding secondary routes)
N: US-522 at the VA/WV border.
S: A bunch along the VA/NC border, but I think that due to surveying errors, US-258 may be the furthest south.
E: Eastern end of VA-175 on Chincoteauge Island.
W: US-58 at the VA/TN Border.
The northern most highway in Michigan is M-26, slightly further north of US-41 between the Brockway Mountain Drive ends.
The southern most highway in Michigan is M-49, slightly south of every state maintained highway east of it.
The eastern most highway in Michigan is a tie with I-69 and I-94 at the Bluewater Bridge.
The western most highway in Michigan is US-2.
The following are approximate for Vermont:
Northern: due to surveying errors and the Canadian border not exactly following an exact straight parallel, it's potentially one of three crossings: I-89, VT 108, or VT 253.
Eastern: VT 253's border crossing to Quebec.
Southern: Same as before...surveying errors put it at VT 142 in Vernon.
Western: The VT 17/NY 185 "Champlain Bridge".
New York:
North: 4-way tie (NY 30, NY 189, NY 276, NY 374)
South: NY 440
East: NY 27
West: 4-way tie (NY 5, NY 17, NY 426, NY 430)
Eastern CA is CA 62 at Parker Dam.
Southern CA is I-5 at the San Ysidro Border Crossing.
Western CA is CA 211 at Ferndale.
Northern CA is US 101, US 199, I-5, US 97, CA 161, CA 139, and US 395, all across the 42nd parallel.
edited.
For Washington:
Westernmost - SR 110 at La Push, a small coastal village surrounded by Olympic NP
Easternmost - US 12 between Clarkston and Lewiston, ID as it crosses the Snake River, which is slightly east of the Idaho straightline at 117 degrees east
Southernmost - SR 14, as it runs along the Columbia River; the southernmost point seems to be southeast of Washougal
Northernmost - Any Canadian border crossing (I-5, SR 543, SR 539, SR 9, SR 9 Spur, US 97, SR 21, US 395, SR 25, SR 31)
MN
Northern: several routes crossing the 49th parallel border with Canada
Southern: all routes crossing into Iowa
Eastern: MN 61 crossing the Canadian border at Grand Portage
Western: MN 28 crossing the South Dakota border at Browns Valley, in the little jut formed by the Minnesota River and Lake Traverse
Quote from: ozarkman417 on September 04, 2020, 11:07:20 PM
MO:
North: Tie, because most of the northern border lies on a single latitude. Taking in to account the Earth's curvature, it becomes Atchison County V.
South: Tie. Southern end of the Bootheel is at Lat 36 N. Candidates: I-55, US 61, MO 108, Supplemental Routes F, DD, TT, and NN.
East: US Routes 60 & 62.
West: Once again Atchison County V.
Something I didn't know until I read it on Jeff Morrison's Iowa Highway Ends website is that the southern Iowa border (the northern Missouri border) is not straight East-West west of the Des Moines River. He wrote an article about Sullivan's Line and the Honey War at http://iowahighwayends.net/maps/sullivanline.html . Basically, the border creeps further and further north the farther east you go. That said, the most northerly point in Missouri's highway system is probably where MO 81 enters Iowa north of Kahoka.
For Iowa:
North: Everything that goes into Minnesota plus IA 9, which enters South Dakota on its short East-West border northwest of Larchwood
South: US 61/136 crossing the Des Moines River west of Keokuk
East: US 52/IA 64 as they cross the Mississippi River at Sabula
West: IA 3 as it crosses the Big Sioux River west of Westfield
Oregon:
North: US 101
East: OR 86
South: US 95, OR 140, US 395, OR 39, US 97, I-5, US 199, and US 101
West: OR 250
PA:
Northern: PA 5 at the PA/NY border in Erie County
Eastern: Interstate 84 while crossing the Delaware river to enter NY in Matamoras, Pike County
Southern: Due to surveying errors, the southernmost point of PA is south of Hanover, York County. There is no state-maintained road that crosses at this point. As PA's southern border is rather long, there could be several candidates for southernmost road, including a few that run directly on the border (including PA 163 and PA 851).
Western: There are several candidates for westernmost state-maintained route in PA. Again, surveying errors could cause slight deviations from true north-south.
Florida:
Northern: Several routes along the FL/AL border, exactly which one depends on surveying errors.
Eastern: FL A1A in Riviera Beach
Southern: Although US 1 is very close to being the winner, it's FL A1A in Key West (unless the roads at the Southenmost Point marker are state-maintained).
Western: FL 292 along the beach at the FL/AL border
KY (looking at Apple Maps on my phone):
Eastern: KY 194
Southern: KY 94
Western: KY 971 (unless there are any state routes in Kentucky Bend–but I don't think there are)
Northern: KY 8
For Indiana:
Northern: the most boring of the four extremes, it's whatever highway crosses from Indiana into Michigan. Several state, U.S. and interstate highways do that.
Eastern: Surprisingly more easy to do, it's SR 156 in rural Switzerland County along the Ohio River. The bend of the river juts it further east than the Indiana-Ohio border
Southern: I had originally guessed it would be in Posey County, but nope. Southernmost state highway is SR 161 in Spencer County at the beginning of the the Glover Cary Bridge into Owensboro, Kentucky
Western:Alright, this one is definitely in Posey County. It's SR 62 at the Wabash Memorial Bridge over the Wabash River.
Massachusetts:
N: MA 150 in Amesbury entering South Hampton, NH
E: MA 28 in Chatham
S: MA 88 southern terminus in Westport
W: MA 23 in Egremont entering Hillsdale, NY
New Hampshire:
N: US 3 in Pittsburg entering Quebec
E: NH 1B in New Castle
S: NH 38 in Pelham entering Dracut, MA (the border there does go ESE from the CT River ever so slightly - confirmed latitude)
W: NH 119 in Hinsdale entering Brattleboro, VT (NH 9 to north almost as close - but longitude confirms 119)
Quote from: US 89 on September 04, 2020, 11:10:17 PM
Quote from: thspfc on September 04, 2020, 10:16:42 PM
Southern is a tie between several if you aren't being picky, but if you factor in the curve of the earth, WI-32 at the Illinois border is the winner.
Quote from: ozarkman417 on September 04, 2020, 11:07:20 PM
North: Tie, because most of the northern border lies on a single latitude. Taking in to account the Earth's curvature, it becomes Atchison County V.
How are these at all related to the curvature of the earth? Theoretically, the state lines are supposed to follow an exact parallel of latitude - the only reason they don't necessarily run perfectly east-west is because 19th century surveyors could only be so accurate.
All I did was click on the location on Maps, and the spot where WI-32 crosses into Illinois was at a lower latitude than the spot where WI-35 crosses into Illinois. So I may have been wrong, but I don't feel like checking every single place it could posibly be.
NJ appears to have 3 easy answers, and 1 vague...
N: NJ 23 in Montague
S: NJ 109 in Cape May.
E: NJ 67 in Fort Lee. Other routes exist though, including 9W and the Palisades. (NJ 36 is close when you factor in Latitude, but still west of NJ 67's eastern-most point.)
W: NJ 49 in Pennsville.
Quote from: WNYroadgeek on September 05, 2020, 12:10:26 AM
New York:
North: 4-way tie (NY 30, NY 189, NY 276, NY 374)
South: NY 440
East: NY 27
West: 4-way tie (NY 5, NY 17, NY 426, NY 430)
As seen graphically with a METAL vertex extremes search result based on TM data in New York:
(https://www.teresco.org/files/ny-bounds.png)
Ohio
Northern - Where Ohio 7 and Ohio 531 end at each other in Conneaut.
East - Several along the PA border.
South - US 52 West of Burlington
West - Several along IN border.
Since Indiana has been done I'll do Mississippi
North - any highway that crosses into Tennessee (US-45, US-61, I-55, I-269, MS-301, MS-309, MS-15 to name a few)
East - US-72 at the Alabama State line east of Iuka
South - US-90 at the Louisiana State line in Pearlington
West - MS-24 western terminus at Fort Adams
Maryland:
West: 4-way tie between US 219, US 50, MD 39 & I-68 at the WV border in Garrett County
North: Any of the countless routes that touch the Mason-Dixon Line
East: MD 528 in Ocean City
South: MD 380 in Somerset County
North Carolina:
Northernmost: Hard to say, but based on surveying errors, my guess is the northern terminus of NC 194
Easternmost: Along NC 12 near Rodanthe
Southernmost: Eastern terminus of NC 904
Westernmost: western end of US 64/74 west of Murphy
Quote from: Jim on September 05, 2020, 10:08:54 AM
Quote from: WNYroadgeek on September 05, 2020, 12:10:26 AM
New York:
North: 4-way tie (NY 30, NY 189, NY 276, NY 374)
South: NY 440
East: NY 27
West: 4-way tie (NY 5, NY 17, NY 426, NY 430)
As seen graphically with a METAL vertex extremes search result based on TM data in New York:
(https://www.teresco.org/files/ny-bounds.png)
Yeah, a combination of surveying errors and an adjustment made to put Fort Blunder on the US side means that the NY/QC crossings are NOT all at the same latitude. Looking at Google Maps, it appears the NY/PA border is better about staying on the same longitude, though I didn't look THAT closely.
Quote from: froggie on September 05, 2020, 12:10:05 AM
The following are approximate for Vermont:
Northern: due to surveying errors and the Canadian border not exactly following an exact straight parallel, it's potentially one of three crossings: I-89, VT 108, or VT 253.
Eastern: VT 253's border crossing to Quebec.
Southern: Same as before...surveying errors put it at VT 142 in Vernon.
Western: The VT 17/NY 185 "Champlain Bridge".
Looking at Google Maps, the northernmost would be VT 108.
Quote from: Jim on September 05, 2020, 10:08:54 AM
Quote from: WNYroadgeek on September 05, 2020, 12:10:26 AM
New York:
North: 4-way tie (NY 30, NY 189, NY 276, NY 374)
South: NY 440
East: NY 27
West: 4-way tie (NY 5, NY 17, NY 426, NY 430)
As seen graphically with a METAL vertex extremes search result based on TM data in New York:
(https://www.teresco.org/files/ny-bounds.png)
Can confirm the northern extreme. As with VT/QC (mentioned upthread), the NY/QC border does not exactly follow a latitude parallel.
Quote from: froggie on September 05, 2020, 12:10:05 AM
Northern: due to surveying errors and the Canadian border not exactly following an exact straight parallel, it's potentially one of three crossings: I-89, VT 108, or VT 253.
Narrowed it down to VT 108.
Quote from: Thing 342 on September 05, 2020, 12:01:24 AM
S: A bunch along the VA/NC border, but I think that due to surveying errors, US-258 may be the furthest south.
I came up with US 29, which just barely beat out US 15.
Quote from: Kulerage on September 05, 2020, 02:55:53 PM
North Carolina:
Northernmost: Hard to say, but based on surveying errors, my guess is the northern terminus of NC 194
Did an analysis and came up with the same thing...NC 194.
Wyoming and Colorado are the easiest. If you hit a state line, you are at a tie for either the northernmost, southernmost, easternmost, or westernmost point on the state's highway system. Kansas is the same except if the highway hits the Missouri River. There is technically a small portion of Kansas east of the main KS/MO state line thanks to a small bend in the Missouri River, but no highways exist in that bend.
Quote from: skluth on September 05, 2020, 07:19:41 PM
Wyoming and Colorado are the easiest. If you hit a state line, you are at a tie for either the northernmost, southernmost, easternmost, or westernmost point on the state's highway system. Kansas is the same except if the highway hits the Missouri River. There is technically a small portion of Kansas east of the main KS/MO state line thanks to a small bend in the Missouri River, but no highways exist in that bend.
I think a thread was posted here about the tiny surveying errors that make Wyoming a less than perfect rectangle if you know where to look, so I'd be interested if any state routes cross those imperfections.
All of Utah's extremes theoretically should be ties. But because 19th century surveying wasn't necessarily an exact science, we have:
North: I-15 - latitude 42.001N (should be 42N)
South: US 163 - latitude 36.998N (should be 37N)
East: US 491 - longitude 109.041W (should be 109.05W)
West: SR 56 - longitude 114.052W (should be 114.05W)
Virginia
Quote from: Thing 342 on September 05, 2020, 12:01:24 AM
W: US-58 at the VA/TN Border.
I'm sure the OP wanted state routes, not US routes. If you do include secondary routes, Lee County SR-872 (North Cumberland Drive) loops up from the new section of US-58 in Tennessee back into Virginia and then back down into Tennessee (at the westernmost point) into the village of Cumberland Gap. Otherwise, you are looking at the VA-70 at the point where it intersects US-58 in Jonesville, Virginia (some 33 miles west of westernmost point of Virginia). Are there any of these northern/southern/eastern/westernmost routes that are further away from the actual geographic extreme?
Quote from: Jim on September 05, 2020, 10:08:54 AM
Quote from: WNYroadgeek on September 05, 2020, 12:10:26 AM
New York:
North: 4-way tie (NY 30, NY 189, NY 276, NY 374)
South: NY 440
East: NY 27
West: 4-way tie (NY 5, NY 17, NY 426, NY 430)
As seen graphically with a METAL vertex extremes search result based on TM data in New York:
You know, it's funny, Fort Niagara feels very much like an extreme, but it's actually not even close because of the shape of the state.
Quote from: Dirt Roads on September 05, 2020, 09:37:43 PM
Virginia
Quote from: Thing 342 on September 05, 2020, 12:01:24 AM
W: US-58 at the VA/TN Border.
<snipped> If you do include secondary routes, Lee County SR-872 (North Cumberland Drive) loops up from the new section of US-58 in Tennessee back into Virginia and then back down into Tennessee (at the westernmost point) into the village of Cumberland Gap. Otherwise, you are looking at the VA-70 at the point where it intersects US-58 in Jonesville, Virginia (some 33 miles west of westernmost point of Virginia). Are there any of these northern/southern/eastern/westernmost routes that are further away from the actual geographic extreme?
Back in the day, the term "hiking the Cumberland Gap" actually meant hiking the length of Ridge Trail from the old US-25E crossing all the way up past White Rocks and down through Ewing Trail to the eastern parking area (mostly along the Virginia/Kentucky border). My memory is fading, but I recall this was about 28 miles when I did the hike. After the tunnel was constructed, the term "hiking the Cumberland Gap" means a much, much shorter hike over the historical gap crossing. All which reminds me, that section of US-25E was formerly the westernmost route in Virginia (oops, didn't I just throw shade on Thing342 for the same mistake? Sorry).
West Virginia:
Northernmost: WV-2 at Old US-30 (with loopback on-ramp to US-30 westbound) in Chester.
Southernmost: WV-16 at the Virginia Border just south of Main Street in Bishop.
Easternmost: WV-230 (Shepherdstown Pike) at US-340 just south of Halltown. (US-340 at the Virginia border and unposted US-340 Alt in downtown Harpers Ferry are further east).
Westernmost: US-37 over the Tug Fork at the Kentucky Border between Fort Gay WV and Louisa KY (US-52 just north of the Tabors Creek bridge is further west).
Quote from: thspfc on September 04, 2020, 10:16:42 PM
Only state maintained highways count. (Yes, I know there some oddities like the Illinois tollways not being state maintained, but please just use good judgement and don't ask questions you know the answer to.)
WI:
Northern is WI-13 at the Sand River in Bayfield County
Eastern is WI-42 at the Washington Island ferry dock
Southern is a tie between several if you aren't being picky, but if you factor in the curve of the earth, WI-32 at the Illinois border is the winner.
Western is the US-10 bridge over the St. Croix River at Prescott.
More so because of a surveying error, WI 32 at the Illinois state line is indeed the southernmost point on the Wisconsin state highway system. The Illinois-Wisconsin state line was supposed to be at 42.5 degrees north. The error drew the actual line about a half mile south of that at the Lake Michigan shore and slightly north of 42.5N at the Mississippi River shoreline.
Mike
Quote from: Dirt Roads on September 05, 2020, 09:37:43 PM
Virginia
Quote from: Thing 342 on September 05, 2020, 12:01:24 AM
W: US-58 at the VA/TN Border.
I'm sure the OP wanted state routes, not US routes. ....
Except the OP used a US route in the original post!
Quote from: 1995hoo on September 06, 2020, 08:19:09 AM
Quote from: Dirt Roads on September 05, 2020, 09:37:43 PM
Virginia
Quote from: Thing 342 on September 05, 2020, 12:01:24 AM
W: US-58 at the VA/TN Border.
I'm sure the OP wanted state routes, not US routes. ....
Except the OP used a US route in the original post!
state's highway system = all routes in state
state highway system = state routes only
For Hawaii:
Northernmost: HI 560 on Kauai, near the intersection with Alealea Rd.
Westernmost: HI 50 on Kauai, where it ends at an entrance to the Pacific Missile Range military facility (the populated island of Niihau is farther west, but it's all under private ownership and has no state-maintained routes)
Easternmost: HI 130 on the Big Island, near its intersection with county route 132 in Pahoa
Southernmost: HI 11 on the Big Island, about 0.8 mile west of the intersection with county-maintained South Point Rd.
Alaska is trickier, since there are a lot of state-maintained roads with no route numbers (other than internal six-digit inventory numbers). They would probably extend the reach of the state highway system well beyond the numbered route system, to Captain Jack Rd. in Unalaska or maybe farther west in the Aleutians, to Utqiagvik (Barrow) in the far north, to the Canadian border in Hyder for the easternmost point, and somewhere on Annette Island south of Ketchikan. But I'll have to prowl through the state road inventory to nail down these down, when I have more time.
Quote from: Dirt Roads on September 05, 2020, 09:37:43 PM
Virginia
Quote from: Thing 342 on September 05, 2020, 12:01:24 AM
W: US-58 at the VA/TN Border.
I'm sure the OP wanted state routes, not US routes. If you do include secondary routes, Lee County SR-872 (North Cumberland Drive) loops up from the new section of US-58 in Tennessee back into Virginia and then back down into Tennessee (at the westernmost point) into the village of Cumberland Gap. Otherwise, you are looking at the VA-70 at the point where it intersects US-58 in Jonesville, Virginia (some 33 miles west of westernmost point of Virginia). Are there any of these northern/southern/eastern/westernmost routes that are further away from the actual geographic extreme?
The OP included a US highway on his list, US-10.
South Carolina:
E - SC 179
S - US 17
W - US 76
N - US 176 (old SC 251 which is now S-23-17 used to hold this distinction)
Quote from: Mapmikey on September 06, 2020, 10:43:22 AM
South Carolina:
E - SC 179
S - US 17
W - US 76
N - US 176 (old SC 251 which is now S-23-17 used to hold this distinction)
If we assume the OP's intent for "state-maintained" to mean ANY route maintained by a state (as opposed to a county, city, township, etc.) regardless of signage, then old SC 251/current S-23-17 beats US 176 as it's still maintained by SCDOT.
Quote from: JoePCool14 on September 04, 2020, 10:39:02 PM
I appreciate you making it easy for me to figure out Illinois' northern most.
The northern most would be IL-137 (Sheridan Road) which becomes WI-32 going into Wisconsin.
The eastern most could possibly be IL-33 or US-50 down by Vincennes, Indiana.
The southern most would have to be US-62 south of Cairo.
The western most looks like it is US-24 through Quincy.
Due to the errors in the state line, it's IL-35 over in East Dubuque for the northernmost point.
CT is easy
Northernmost: Anywhere at the MA border not bordering the Southwick jog
Easternmost: Anywhere along the RI border from where CT 216 crosses north.
Southernmost and Westernmost: I-95 at the NY border. But southernmost state route would be CT 136 in Rowayton and westernmost would be CT 15 at the NY border.
Quote from: jp the roadgeek on September 06, 2020, 12:06:33 PM
CT is easy
Northernmost: Anywhere at the MA border not bordering the Southwick jog
Easternmost: Anywhere along the RI border from where CT 216 crosses north.
Southernmost and Westernmost: I-95 at the NY border. But southernmost state route would be CT 136 in Rowayton and westernmost would be CT 15 at the NY border.
I-95 in CT appears to be the only instance of the same highway being multiple of the most extreme points.
Quote from: thspfc on September 06, 2020, 03:23:49 PM
I-95 in CT appears to be the only instance of the same highway being multiple of the most extreme points.
AR 43 is a legitimate contender. I don't feel like going through the entire Arkansas-Missouri border to see if another crossing is barely further north, but it is definitely the westernmost.
Isn't I-684 the Westernmost highway in Connecticut? Even if it doesn't count, CT 15 still reaches further West than I-95.
I'll try to do both Colorado and Wyoming later, since the surveying errors mean their borders aren't prefectly straight (and even if they were exactly at the intended lines, the Northern and Southern boundaries would still bend sightly due to Earth's shape).
Edit: After a quick search in Google Maps, here is what I've got for the two square states :sombrero:.
Colorado:
N: Where WY 70 dips into Colorado. If that doesn't count, then US 385.
S: US 84
E: CO 116
W: CO 90
Wyoming:
N: US 212 atop the Beartooth
S: US 287
E: US 20 (beating US 26 literally by an inch!)
W: US 191 at the Northwestern corner
And as an extra bonus, here are the extremes for my home region of Aragon, Spain (only national and regional routes are included):
N: A-136 (Surprise, the Portalet pass is sightly more North than the Somport one)
S: A-1514
E: N-230
W: A-2 (almost absolute West)
Quote from: CNGL-Leudimin on September 06, 2020, 05:54:27 PM(and even if they were exactly at the intended lines, the Northern and Southern boundaries would still bend sightly due to Earth's shape).
A line of latitude has no segments that are more north or south than another part of the line, despite the line being curved.
Georgia's are nicely well defined:
North: GA 28 at the NC state line (notice the state line deflects northward at the east end)
East: US 80 about 1.5 miles shy of its end on Tybee Island (it turns slightly west after that)
South: GA 23/121 at the FL state line
West: GA 301's north end at the AL state line
Louisiana:
North: the internet says the northwest-most section is slightly further north despite the northern border of the state being on a parallel. If that's the case, I-49 at the AR state line is the closest highway to the coordinates given.
South: south terminus of LA 3090 in Port Fourchon
West: LA 82 over the Sabine River at the TX border
East: LA 23 before it heads southwest near its terminus in Venice
iPhone
Quote from: US 89 on September 06, 2020, 04:50:33 PM
Quote from: thspfc on September 06, 2020, 03:23:49 PM
I-95 in CT appears to be the only instance of the same highway being multiple of the most extreme points.
AR 43 is a legitimate contender. I don't feel like going through the entire Arkansas-Missouri border to see if another crossing is barely further north, but it is definitely the westernmost.
TM's data uses two different points for AR 43's clipping of the corner, but those two points are its western and northern extremes within the data. It finds nothing further north, and it looks like one could make the case for shifting the AR/MO border north by a fraction based on the OSM map on which it's plotted.
(https://www.teresco.org/files/ar-bounds.png)
(https://www.teresco.org/files/ar-corner.png)
Here are the 10 northernmost and westernmost points in Arkansas among those points plotted in TM data.
By northernmost:
<BestOf: AR43Sil/MO43@AR/MO (36.499462,-94.617683) AR279@AR/MO (36.499434,-94.276161) US71@AR/MO (36.499339,-94.269487) AR23@AR/MO (36.499256,-93.709752) AR143@AR/MO (36.499201,-93.648276) AR43Sil/OK20@OK/AR (36.499167,-94.61782) AR59/MO59@AR/MO (36.499132,-94.480319) US63@AR/MO (36.499063,-91.536777) AR395/MO17@AR/MO (36.499046,-91.806049) AR221/MO39@AR/MO (36.498839,-93.560085) AR21/MO13@AR/MO (36.498822,-93.397479) AR87Eli@AR/MO (36.498795,-92.13887) AR265Pea@AR/MO (36.498727,-94.111556) AR37Gat/MO37@AR/MO (36.498718,-93.931947) AR5/MO5@AR/MO (36.498632,-92.48291) >
By westernmost:
<BestOf: AR43Sil/OK20@OK/AR (36.499167,-94.61782) AR43Sil/MO43@AR/MO (36.499462,-94.617683) AR43Sil@E390&OK20@E0390 (36.452657,-94.610353) AR43_S/OK20_W (36.421998,-94.60546) AR43/AR72 (36.403901,-94.60194) AR43Sil@StaLineRd (36.386032,-94.59937) AR12Gen/OK116@OK/AR (36.278393,-94.582543) AR43/AR102 (36.384663,-94.57917) AR12/AR43 (36.276512,-94.573687) AR72@SchHouRd (36.419256,-94.568347) AR102@JayRd (36.384273,-94.565244) US412@OK/AR (36.176384,-94.565232) AR43Sil@SeqRd (36.212643,-94.562473) AR102@MouRd (36.360982,-94.547577) AR43Sil@MtOliSt_S (36.196078,-94.541045) >
Of course, TM's data is not perfect, and is subject to errors from the map/image sources used and the actual points chosen by the person plotting its routes.
Quote from: bassoon1986 on September 06, 2020, 10:38:44 PM
Louisiana:
North: the internet says the northwest-most section is slightly further north despite the northern border of the state being on a parallel. If that's the case, I-49 at the AR state line is the closest highway to the coordinates given.
South: south terminus of LA 3090 in Port Fourchon
West: LA 82 over the Sabine River at the TX border
East: LA 23 before it heads southwest near its terminus in Venice
TM's data agrees with your north, south, and east, but disagrees on the west.
(https://www.teresco.org/files/la-bounds.png)
Quote from: Jim on September 07, 2020, 08:20:44 AM
Quote from: bassoon1986 on September 06, 2020, 10:38:44 PM
Louisiana:
North: the internet says the northwest-most section is slightly further north despite the northern border of the state being on a parallel. If that's the case, I-49 at the AR state line is the closest highway to the coordinates given.
South: south terminus of LA 3090 in Port Fourchon
West: LA 82 over the Sabine River at the TX border
East: LA 23 before it heads southwest near its terminus in Venice
TM's data agrees with your north, south, and east, but disagrees on the west.
(https://www.teresco.org/files/la-bounds.png)
My eyeball was way off on that one. So it's LA 170 at the TX line. At least until that road is given back to local authorities. I could see it being another candidate.
iPhone
Eyeballing it and assuming the surveys are correct (fat chance) for Oklahoma:
Western - tie between US412 and OK325
Northern - too many to mention
Eastern - OK87 just north of the Red River
Southern - same road as Eastern. Where OK87 turns east, it is a couple of miles south of where US259 crosses the Red River.
Do any other states have one highway that clinches more than one cardinal point?
Quote from: tigerwings on September 05, 2020, 11:13:03 AM
Ohio
Northern - Where Ohio 7 and Ohio 531 end at each other in Conneaut.
East - Several along the PA border.
South - US 52 West of Burlington
West - Several along IN border.
Running METAL:
East - OH 39
West - US 50
South - US 52 across the bridge into West Virginia is the southernmost point in the set, but the curve west of that bridge is in fact the southernmost point in the system.
Quote from: rte66man on September 07, 2020, 11:34:02 AM
Do any other states have one highway that clinches more than one cardinal point?
As mentioned above, Arkansas has AR 43.
A rough Texas guess:
South: FM 1419 in east Brownsville
East: TX 63 at LA border
West: TX 178 at NM border
North: Eyeballing it here, but it looks like US 287 near Kerrick, due to a survey error.
Quote from: Flint1979 on September 05, 2020, 12:03:25 AM
The northern most highway in Michigan is M-26, slightly further north of US-41 between the Brockway Mountain Drive ends.
The southern most highway in Michigan is M-49, slightly south of every state maintained highway east of it.
The eastern most highway in Michigan is a tie with I-69 and I-94 at the Bluewater Bridge.
The western most highway in Michigan is US-2.
I hadn't realized until your post that the MI/OH border isn't due east-west. I thought it was judicially determined to be at a specific longitude.
Quote from: Brandon on September 06, 2020, 11:01:03 AM
Quote from: JoePCool14 on September 04, 2020, 10:39:02 PM
I appreciate you making it easy for me to figure out Illinois' northern most.
The northern most would be IL-137 (Sheridan Road) which becomes WI-32 going into Wisconsin.
The eastern most could possibly be IL-33 or US-50 down by Vincennes, Indiana.
The southern most would have to be US-62 south of Cairo.
The western most looks like it is US-24 through Quincy.
Due to the errors in the state line, it's IL-35 over in East Dubuque for the northernmost point.
You're right. I absolutely didn't do that right.
Quote from: JCinSummerfield on September 08, 2020, 02:04:09 PM
Quote from: Flint1979 on September 05, 2020, 12:03:25 AM
The northern most highway in Michigan is M-26, slightly further north of US-41 between the Brockway Mountain Drive ends.
The southern most highway in Michigan is M-49, slightly south of every state maintained highway east of it.
The eastern most highway in Michigan is a tie with I-69 and I-94 at the Bluewater Bridge.
The western most highway in Michigan is US-2.
I hadn't realized until your post that the MI/OH border isn't due east-west. I thought it was judicially determined to be at a specific longitude.
The boundary isn't due east-west because of several considerations made to OH and IN in exchange for MI being admitted to the Union.
Originally the southern border of MI was defined as being due east from the southernmost point of Lake Michigan. However at the time this definition was created, it was mistakenly believed that the entirety of Lake Michigan was north of the latitude of Lake Erie, and so OH would have all or most of the Lake Erie shoreline. The border was later changed to be on an angle, from the southern point of Lake Michigan to the the Maumee Bay. This gave the so-called "Toledo Strip" to OH (albeit after several more years of debate and eventual saber rattling between the two militias). IN not having a port under this definition, the northern boundary of IN was redefined to be an e-w line 10 miles north of the southern point of Lake Michigan. This resulted in the step between the IN and OH northern borders.
Quote from: JCinSummerfield on September 08, 2020, 02:04:09 PM
Quote from: Flint1979 on September 05, 2020, 12:03:25 AM
The northern most highway in Michigan is M-26, slightly further north of US-41 between the Brockway Mountain Drive ends.
The southern most highway in Michigan is M-49, slightly south of every state maintained highway east of it.
The eastern most highway in Michigan is a tie with I-69 and I-94 at the Bluewater Bridge.
The western most highway in Michigan is US-2.
I hadn't realized until your post that the MI/OH border isn't due east-west. I thought it was judicially determined to be at a specific longitude.
If you were to draw a line from the Michigan/Ohio/Indiana tripoint to where the border turns in Lake Erie most of that line would be running slightly in Michigan and not on the line or in Ohio. It's about 72 miles across and at about the halfway point it's even more into Michigan like around where US-127 is and Morenci. It's weird but if you were to look at it with a glance you'd probably think that it's a straight line.
Quote from: GaryV on September 08, 2020, 04:28:10 PM
Quote from: JCinSummerfield on September 08, 2020, 02:04:09 PM
Quote from: Flint1979 on September 05, 2020, 12:03:25 AM
The northern most highway in Michigan is M-26, slightly further north of US-41 between the Brockway Mountain Drive ends.
The southern most highway in Michigan is M-49, slightly south of every state maintained highway east of it.
The eastern most highway in Michigan is a tie with I-69 and I-94 at the Bluewater Bridge.
The western most highway in Michigan is US-2.
I hadn't realized until your post that the MI/OH border isn't due east-west. I thought it was judicially determined to be at a specific longitude.
The boundary isn't due east-west because of several considerations made to OH and IN in exchange for MI being admitted to the Union.
Originally the southern border of MI was defined as being due east from the southernmost point of Lake Michigan. However at the time this definition was created, it was mistakenly believed that the entirety of Lake Michigan was north of the latitude of Lake Erie, and so OH would have all or most of the Lake Erie shoreline. The border was later changed to be on an angle, from the southern point of Lake Michigan to the the Maumee Bay. This gave the so-called "Toledo Strip" to OH (albeit after several more years of debate and eventual saber rattling between the two militias). IN not having a port under this definition, the northern boundary of IN was redefined to be an e-w line 10 miles north of the southern point of Lake Michigan. This resulted in the step between the IN and OH northern borders.
That kind of line would have given Michigan both South Bend and Toledo.
And now, for something completely different: West Bengal
West: WB 4A, just east of Muri, Jharkhand
South: NH 116B/WB 4, west of Digha and just east of the border with Odisha
East: NH 27, on the east shore of the Sankosh River, to the west of Srirampur, Assam
North: Three possibilities -
NH 10, crossing the Rangpo River to Rangpo, Sikkim
NH 717A, near Rhenock, Sikkim
NH 717B, as it crosses back and forth between Sikkim and West Bengal ala US 212 between Wyoming and Montana.
Eyeballing it leans it toward NH 10.
None of the AH routes qualify.