Interesting things about states and their roads

[tdindy88]

Indiana also has I-64 which has no 3dis in the state but the interstate has 3dis elsewhere (Kentucky and Virginia.) That would bring us up to six as well.

[Gnutella]

Here's one for all states:

a state's "missing 3di score" is the number of primary interstates that have a 3di in another state but not that one. For example I-24, I-59 and I-95 all enter Georgia, and have 3di's in other states (TN, AL, east coast) but not Georgia. So the Peachtree State's score is 3.

Yeah, it's not fair, because those routes cut through corners of GA (and I-16 takes the place of an x95 spur that would otherwise connect to Savannah), but that's how the score is calculated.

Several states have a score of zero: New Jersey takes care of I-76, 78, 80, and 95; and even New York has a 3di for every interstate that has any at all (I-86 and I-88 do not.)

What state has the highest score? Arizona has 3 (10, 15, 40). Indiana has 5 (70, 74, 80, 90, 94). But the winner has 6 -- and unlike the others, it has plenty of 3di's in-state (and 2 of its primary routes don't have 3di's anywhere else!)

What could this mystery state be?

Pennsylvania. I-70, I-78, I-81, I-84, I-86 and I-90 all enter Pennsylvania, but none have three-digit Interstates there.

The three-digit Interstates in Pennsylvania are:


I-176
I-180
I-276
I-279
I-283
I-295
I-376
I-380
I-476
I-579
I-676

[GaryV]

Also, I have only ever seen the "superstreet" highway concept in NC. This design is based heavily on U-turns. All roads intersecting such a highway can only turn right. Left turns, as well as straight across movements, must turn right and go through a U-turn. I am not a fan of the setup.

Metro Detroit has a lot of them.

I think you're confusing super streets with Michigan lefts.

[CNGL-Leudimin]

Here's one for all states:

a state's "missing 3di score" is the number of primary interstates that have a 3di in another state but not that one. For example I-24, I-59 and I-95 all enter Georgia, and have 3di's in other states (TN, AL, east coast) but not Georgia. So the Peachtree State's score is 3.

Yeah, it's not fair, because those routes cut through corners of GA (and I-16 takes the place of an x95 spur that would otherwise connect to Savannah), but that's how the score is calculated.

Several states have a score of zero: New Jersey takes care of I-76, 78, 80, and 95; and even New York has a 3di for every interstate that has any at all (I-86 and I-88 do not.)

What state has the highest score? Arizona has 3 (10, 15, 40). Indiana has 5 (70, 74, 80, 90, 94). But the winner has 6 -- and unlike the others, it has plenty of 3di's in-state (and 2 of its primary routes don't have 3di's anywhere else!)

What could this mystery state be?

Pennsylvania. I-70, I-78, I-81, I-84, I-86 and I-90 all enter Pennsylvania, but none have three-digit Interstates there.

The three-digit Interstates in Pennsylvania are:


I-176
I-180
I-276
I-279
I-283
I-295
I-376
I-380
I-476
I-579
I-676

I-86 doesn't have any 3dis. Since I-295 was extended into Pennsylvania, its "score" is down to 5. The 6th was I-95.

[NWI_Irish96]

Indiana also has I-64 which has no 3dis in the state but the interstate has 3dis elsewhere (Kentucky and Virginia.) That would bring us up to six as well.

If you expressed this score as a percentage instead of a number, Alaska and New Mexico would be at 100%, and Indiana would be next at 86%.

[index]

Also, I have only ever seen the "superstreet" highway concept in NC. This design is based heavily on U-turns. All roads intersecting such a highway can only turn right. Left turns, as well as straight across movements, must turn right and go through a U-turn. I am not a fan of the setup.

Metro Detroit has a lot of them.

It's definitely found elsewhere, but North Carolina has this particular obsession with them. Every single new divided road here seems to be one and ones that aren't are being changed to them.


As for the secondary road designations, signage for them can vary by division. We do not have county roads, yes, but these secondary roads are numbered at the county level and often reset on county lines. Nearly every single road that isn't a US highway, Interstate, city street, or NC highway has an SR number. Even my high school's student drop-off loop has one, SR 1383. The first digit rarely ever exceeds 2, and when it does, it doesn't go above 3, IIRC. Most divisions (like mine, division 10) sign them on black street blades on the top of stop signs, like this, state highways and US routes are sometimes signed like this as well:


https://www.google.com/maps/@34.9786968,-80.5823739,3a,15y,150.71h,93.41t/data=!3m6!1e1!3m4!1sfFK2dyxynCOkqaUp8Ym87g!2e0!7i16384!8i8192


They also used to be signed like this:


https://www.google.com/maps/@35.0251036,-80.6611511,3a,15y,288.32h,89.81t/data=!3m5!1e1!3m3!1sdvIITerk0qDMmE7Aqg2fXA!2e0!6s%2F%2Fgeo3.ggpht.com%2Fcbk%3Fpanoid%3DdvIITerk0qDMmE7Aqg2fXA%26output%3Dthumbnail%26cb_client%3Dmaps_sv.tactile.gps%26thumb%3D2%26w%3D203%26h%3D100%26yaw%3D101.27884%26pitch%3D0%26thumbfov%3D100


Division 14 typically signs them vertically on stop sign posts, I can't find it on GSV right now and I can't illustrate it in Inkscape but it would look something like this:


1
3
0
8


->


South Carolina uses a similar system to this, and also has no county routes. The main difference is that the roads are  numbered S-XX-XX. Even the street blades look the same.


They also sign them on overpasses like this, whereas NC just posts a small number on a green sign next to it:


https://www.google.com/maps/@34.3628867,-80.997024,3a,17.1y,182.95h,98.7t/data=!3m6!1e1!3m4!1s3leffVG0ku_aCtYPoEFKIw!2e0!7i16384!8i8192


In general, South Carolina is a very unique state when it comes to roads, SCDOT design has a very unique look to it.

[kurumi]

Indiana also has I-64 which has no 3dis in the state but the interstate has 3dis elsewhere (Kentucky and Virginia.) That would bring us up to six as well.

My bad. I sliced and diced the FHWA Route Log, which still included I-164.

[Mapmikey]

As for the secondary road designations, signage for them can vary by division. We do not have county roads, yes, but these secondary roads are numbered at the county level and often reset on county lines. Nearly every single road that isn't a US highway, Interstate, city street, or NC highway has an SR number. Even my high school's student drop-off loop has one, SR 1383. The first digit rarely ever exceeds 2, and when it does, it doesn't go above 3, IIRC. Most divisions (like mine, division 10) sign them on black street blades on the top of stop signs




In general, South Carolina is a very unique state when it comes to roads, SCDOT design has a very unique look to it.

I've only seen the black on-top-of stop sign version of NC Secondary signage in the Charlotte region.

Also, the more populous NC counties have secondary numbers that go as high as the 6000s.

Oconee County, SC has signed county routes like this - https://goo.gl/maps/XKTBsqajhPyDveGn8
Orangeburg County used to also have some but random GMSV suggests they may have deposted these
Greenville County has some sort of county marking grid system they post on the street signs - https://goo.gl/maps/5cLdRqmX1xD8wPTM7

[Scott5114]

Oklahoma has no idea what it's doing.

[Flint1979]

Also, I have only ever seen the "superstreet" highway concept in NC. This design is based heavily on U-turns. All roads intersecting such a highway can only turn right. Left turns, as well as straight across movements, must turn right and go through a U-turn. I am not a fan of the setup.

Metro Detroit has a lot of them.

A Michigan left turn doesn't prohibit the straight movement though.

[ftballfan]

Also, I have only ever seen the "superstreet" highway concept in NC. This design is based heavily on U-turns. All roads intersecting such a highway can only turn right. Left turns, as well as straight across movements, must turn right and go through a U-turn. I am not a fan of the setup.

Metro Detroit has a lot of them.

A Michigan left turn doesn't prohibit the straight movement though.

Most of the Michigan Lefts on US-31 between New Holland St and Fillmore St force traffic going straight through to turn right and then U-turn (the only exception is at Port Sheldon St).
There are also several no-straight-thru Michigan Lefts on M-121 between Zeeland and Hudsonville, M-45 in the Allendale area, and US-12 between Ypsilanti and Wayne

[Max Rockatansky]

Also, I have only ever seen the "superstreet" highway concept in NC. This design is based heavily on U-turns. All roads intersecting such a highway can only turn right. Left turns, as well as straight across movements, must turn right and go through a U-turn. I am not a fan of the setup.

Metro Detroit has a lot of them.

A Michigan left turn doesn't prohibit the straight movement though.

Most of the Michigan Lefts on US-31 between New Holland St and Fillmore St force traffic going straight through to turn right and then U-turn (the only exception is at Port Sheldon St).
There are also several no-straight-thru Michigan Lefts on M-121 between Zeeland and Hudsonville, M-45 in the Allendale area, and US-12 between Ypsilanti and Wayne

M-5 on Grand River Avenue had some prohibited lefts when I lived in the area.  It still looks one at M-102/Eight Mile Road is still present.

[paulthemapguy]

Illinois has more 2di's than any other state.

[cwf1701]

In Michigan, Every interstate with the exception of I-194, I-275, I-296, I-475,and I-675 have a Interstate Business route (I-69, I-75, I-94, I-96, I-196, I-375, I-496, and I-696.)

[Flint1979]

In Michigan, Every interstate with the exception of I-194, I-275, I-296, I-475,and I-675 have a Interstate Business route (I-69, I-75, I-94, I-96, I-196, I-375, I-496, and I-696.)

What's so special about that? Out of 13 interstates 5 of them don't have business routes.

[KEVIN_224]

I'm guessing states which don't duplicate US and interstate route numbers counts in this thread? Connecticut has the following:

US Route 1
US Route 5
US Route 6
US Route 7
US Route 44
US Route 202

I-84
I-91
I-95
I-291
I-384
I-395
I-684 (clips the northwest corner of Greenwich)
I-691

Connecticut's highest numbered route in the field is 372 (from the Plainville/Bristol town line to Cromwell).

Connecticut also doesn't have any county routes. Interstate mileage is from state line to state line (about 97 and change for I-84, 58 for I-91 and about 110-ish for I-95).

[D-Dey65]

North Carolina, as far as I can tell, has no county routes. Secondary roads have a four digit SR code; signed on green street blades as SR 1101, as an example.

South Carolina has something similar. They have state designations like "S-27-172" for Gregorie Neck Road in Jasper County, and I've seen things like "S-25-2112" or something like that on similar local roads.

On the other side of North Carolina, Virginia seems to have two classes of State Secondary Routes. The most notable, are your black and white circles, which I remember an old crusade to have banned for other states back in the days when the internet first encountered roadgeeking, and routes of a lower class which only have street name signs.

[Scott5114]

On the other side of North Carolina, Virginia seems to have two classes of State Secondary Routes. The most notable, are your black and white circles, which I remember an old crusade to have banned for other states back in the days when the internet first encountered roadgeeking, and routes of a lower class which only have street name signs.

Black and white circles are spelled out as the default route marker by the MUTCD. They were never in danger of getting "banned"–roadgeeks just don't like states using them because they're bland and uncreative. Notably, Oklahoma shifted away from them around the time roadgeeking started to pick up steam on the internet, but that had nothing to do with any sort of crusade against them–it was due to Oklahoma's centennial.

In addition to Virginia, MS, IA, KY, NJ, DE, and VT still use the circles in some capacity.

[sprjus4]

Here's one for all states:

a state's "missing 3di score" is the number of primary interstates that have a 3di in another state but not that one. For example I-24, I-59 and I-95 all enter Georgia, and have 3di's in other states (TN, AL, east coast) but not Georgia. So the Peachtree State's score is 3.

Yeah, it's not fair, because those routes cut through corners of GA (and I-16 takes the place of an x95 spur that would otherwise connect to Savannah), but that's how the score is calculated.

Several states have a score of zero: New Jersey takes care of I-76, 78, 80, and 95; and even New York has a 3di for every interstate that has any at all (I-86 and I-88 do not.)

What state has the highest score? Arizona has 3 (10, 15, 40). Indiana has 5 (70, 74, 80, 90, 94). But the winner has 6 -- and unlike the others, it has plenty of 3di's in-state (and 2 of its primary routes don't have 3di's anywhere else!)

What could this mystery state be?

I-64 traverses 6 states between Wentzville, MO and Chesapeake, VA over a 953 mile course, and with I-264 in Kentucky being the one exception, all of the 3d's for that route exist in Hampton Roads, Virginia - I-264, I-464, I-564, and I-664.

I-164 also used to exist in Indiana, but was replaced with I-69.

[Mapmikey]

On the other side of North Carolina, Virginia seems to have two classes of State Secondary Routes. The most notable, are your black and white circles, which I remember an old crusade to have banned for other states back in the days when the internet first encountered roadgeeking, and routes of a lower class which only have street name signs.

Virginia definitely has just one system of secondary state route.  Not sure exactly what is meant by street name sign posting for secondary routes, but to my knowledge nowhere in Virginia are secondary routes routinely posted solely by references on green street blade signs.

[hbelkins]

On the other side of North Carolina, Virginia seems to have two classes of State Secondary Routes. The most notable, are your black and white circles, which I remember an old crusade to have banned for other states back in the days when the internet first encountered roadgeeking, and routes of a lower class which only have street name signs.

There's no difference in the routes. A number of them are signed with both circular markers and the rectangular ones.

On the other side of North Carolina, Virginia seems to have two classes of State Secondary Routes. The most notable, are your black and white circles, which I remember an old crusade to have banned for other states back in the days when the internet first encountered roadgeeking, and routes of a lower class which only have street name signs.

Virginia definitely has just one system of secondary state route.  Not sure exactly what is meant by street name sign posting for secondary routes, but to my knowledge nowhere in Virginia are secondary routes routinely posted solely by references on green street blade signs.

Probably the rectangular markers such as the one you can see here.

[sprjus4]

On the other side of North Carolina, Virginia seems to have two classes of State Secondary Routes. The most notable, are your black and white circles, which I remember an old crusade to have banned for other states back in the days when the internet first encountered roadgeeking, and routes of a lower class which only have street name signs.

Virginia definitely has just one system of secondary state route.  Not sure exactly what is meant by street name sign posting for secondary routes, but to my knowledge nowhere in Virginia are secondary routes routinely posted solely by references on green street blade signs.

I've seen "F"  routes, presumably Frontage Roads, but they're marked on the traditional circle route shield with F-XXX

[hbelkins]

On the other side of North Carolina, Virginia seems to have two classes of State Secondary Routes. The most notable, are your black and white circles, which I remember an old crusade to have banned for other states back in the days when the internet first encountered roadgeeking, and routes of a lower class which only have street name signs.

Virginia definitely has just one system of secondary state route.  Not sure exactly what is meant by street name sign posting for secondary routes, but to my knowledge nowhere in Virginia are secondary routes routinely posted solely by references on green street blade signs.

I've seen "F"  routes, presumably Frontage Roads, but they're marked on the traditional circle route shield with F-XXX

I've seen them in the rectangles as well, along with "T" routes.

[Flint1979]

Here's one for all states:

a state's "missing 3di score" is the number of primary interstates that have a 3di in another state but not that one. For example I-24, I-59 and I-95 all enter Georgia, and have 3di's in other states (TN, AL, east coast) but not Georgia. So the Peachtree State's score is 3.

Yeah, it's not fair, because those routes cut through corners of GA (and I-16 takes the place of an x95 spur that would otherwise connect to Savannah), but that's how the score is calculated.

Several states have a score of zero: New Jersey takes care of I-76, 78, 80, and 95; and even New York has a 3di for every interstate that has any at all (I-86 and I-88 do not.)

What state has the highest score? Arizona has 3 (10, 15, 40). Indiana has 5 (70, 74, 80, 90, 94). But the winner has 6 -- and unlike the others, it has plenty of 3di's in-state (and 2 of its primary routes don't have 3di's anywhere else!)

What could this mystery state be?

Is it Texas?

[Flint1979]

Here's one for all states:

a state's "missing 3di score" is the number of primary interstates that have a 3di in another state but not that one. For example I-24, I-59 and I-95 all enter Georgia, and have 3di's in other states (TN, AL, east coast) but not Georgia. So the Peachtree State's score is 3.

Yeah, it's not fair, because those routes cut through corners of GA (and I-16 takes the place of an x95 spur that would otherwise connect to Savannah), but that's how the score is calculated.

Several states have a score of zero: New Jersey takes care of I-76, 78, 80, and 95; and even New York has a 3di for every interstate that has any at all (I-86 and I-88 do not.)

What state has the highest score? Arizona has 3 (10, 15, 40). Indiana has 5 (70, 74, 80, 90, 94). But the winner has 6 -- and unlike the others, it has plenty of 3di's in-state (and 2 of its primary routes don't have 3di's anywhere else!)

What could this mystery state be?

And the answer is: Texas!

Good thing it only took me about a minute to figure that out. I didn't scroll down this far and thought it was a new post lol.