Counties reachable via a single route from Ohio

[Konza]

The Indiana/Pennsylvania map has been modified one more time.

The map includes US routes 21, 25, and 27, sections of which were decommissioned due to having been made "obsolete" by parallel Interstates.

Looks like the number of counties reachable from Ohio will settle in around 1080.

The standings, including counties within the state served by US/Interstate routes, in the event anyone is keeping track:

IL  1262
TX  1148
IN  1143
OH  1079
PA  879

[mvak36]

Thanks for pointing me to that mobrule site. I already have an account there but I didn't want to mess with it so I used the guest account to do Missouri. If I did it right, I got 986 counties (32 states and DC). EDIT: Missed a few counties for US 63 in Wisconsin (thanks Konza). Total is 993 counties.

[GaryV]

I didn't do a map, but I did the counts for Michigan.  As a "dead end" state (all the routes that go into MI end in MI) it has a surprisingly high county connectivity count - 556 counties in 23 states.

This includes the 72 counties in Michigan on US or Interstate routes.  And it includes 18* counties where the new parts of I-69 are signed, but not yet connected.

I did not include the eastern portion of US-2.  Nor did I include historical routes.  I did include US-10, considering the Badger to be a portion of the route.  Where a US route splits, like US-31 E and W, I counted counties along both branches.

EDIT:

Adding US-2 East adds 12 counties and 4 states.  I've not decided yet if this is fair to include or not.

* Correction on I-69 counties:  8 of the counties in which I-69 south of Indy exists are also on US-41 or US-45; only 18 of the counties are not otherwise connected to MI.

[Konza]

Thanks for pointing me to that mobrule site. I already have an account there but I didn't want to mess with it so I used the guest account to do Missouri. If I did it right, I got 986 counties (32 states and DC).

Thanks.  I was going to tackle Missouri next.  Nit-picking, but doesn't US 63 still enter Wisconsin?  The green county in SW Oklahoma?  And how many counties could you add if you added the stretches of US 40, US 50, US 60, and US 66 west of where they disappeared under their Interstate successors?

Nevertheless, this puts The Show-Me State ahead of the Keystone State in the standings.

I asked mob-rule.com if I could open up a second account for this purpose, and they allowed me to.  Much easier than hoping someone else doesn't come along while you're 30 states into this.

[hotdogPi]

Note for all these maps: I-90 hits Norfolk County, MA (barely).

[Konza]

This includes the 72 counties in Michigan on US or Interstate routes.  And it includes 18* counties where the new parts of I-69 are signed, but not yet connected.

I did not include the eastern portion of US-2.  Nor did I include historical routes.  I did include US-10, considering the Badger to be a portion of the route.  Where a US route splits, like US-31 E and W, I counted counties along both branches.

EDIT:

Adding US-2 East adds 12 counties and 4 states.  I've not decided yet if this is fair to include or not.

* Correction on I-69 counties:  8 of the counties in which I-69 south of Indy exists are also on US-41 or US-45; only 18 of the counties are not otherwise connected to MI.

I think the eastern US 2 and the western US 2 are separate routes.  As you mention, US 10 is linked across Lake Michigan by a ferry.  As was US 16.

I think it's OK to include I-69 as far as Memphis, as well as I-74 as far as Cincinnati.  Since there is some question as to at least the timing of the extension of those routes beyond their current end, I would consider the non-connected segments beyond those points to be separate routes.  As would I I-49 between Texarkana and Fort Smith, which is probably moot because it is expected to parallel US 71.

[mvak36]

Thanks for pointing me to that mobrule site. I already have an account there but I didn't want to mess with it so I used the guest account to do Missouri. If I did it right, I got 986 counties (32 states and DC).

Thanks.  I was going to tackle Missouri next.  Nit-picking, but doesn't US 63 still enter Wisconsin?  The green county in SW Oklahoma?  And how many counties could you add if you added the stretches of US 40, US 50, US 60, and US 66 west of where they disappeared under their Interstate successors?

Nevertheless, this puts The Show-Me State ahead of the Keystone State in the standings.

I asked mob-rule.com if I could open up a second account for this purpose, and they allowed me to.  Much easier than hoping someone else comes along while you're 30 states into this.

I forgot about Wisconsin. Was working on this late last night and missed it. I fixed the county in SW OK. I must have accidentally hit that. I will update my post with a new pic once it updates on mob-rule.

I don't know much about the routing of those old highways so I didn't include that in there. The count in Missouri is now 993 but will be more if the old US routes you mentioned are added.

I just did one state for fun. I won't be doing another one lol. This took up a lot more time than I thought. I am looking forward to seeing your maps for the other states.

[cwf1701]

The Indiana/Pennsylvania map has been modified one more time.

The map includes US routes 21, 25, and 27, sections of which were decommissioned due to having been made "obsolete" by parallel Interstates.

Looks like the number of counties reachable from Ohio will settle in around 1080.

The standings, including counties within the state served by US/Interstate routes, in the event anyone is keeping track:

IL  1262
TX  1148
IN  1143
OH  1079
PA  879

you missed several counties on the map in Michigan where US-25 ran. Before 1974, US-25 ended up in the thumb of Michigan.

[Konza]

you missed several counties on the map in Michigan where US-25 ran. Before 1974, US-25 ended up in the thumb of Michigan.

I stand corrected. Between these three counties in Michigan and four along the former US 30S in Utah (which also apply to IL, IN, and PA), Ohio's count is now 1086.

[Duke87]

I would argue it is bogus to consider the former rather than current extent of US highways. After all, their truncation is generally a direct consequence of the interstate system, and we ARE looking at where the interstates go, so...

The surviving extent of US 25 is fair game though, since it does technically still enter Ohio (ends at the foot of the bridge on the Ohio side of the river).

Also I note a few unshaded counties on the map within Ohio, which are not traversed by a US or interstate highway but which are traversed by Ohio state highways. Are you including these in your total? I would say they should be included.

[Verlanka]

The Indiana/Pennsylvania map has been modified one more time.

The map includes US routes 21, 25, and 27, sections of which were decommissioned due to having been made "obsolete" by parallel Interstates.

Looks like the number of counties reachable from Ohio will settle in around 1080.

The standings, including counties within the state served by US/Interstate routes, in the event anyone is keeping track:

IL  1262
TX  1148
IN  1143
OH  1079
PA  879

you missed several counties on the map in Michigan where US-25 ran. Before 1974, US-25 ended up in the thumb of Michigan.

As well as two counties in Florida where I-75 also runs through: Miami-Dade and DeSoto.

[Konza]

I would argue it is bogus to consider the former rather than current extent of US highways. After all, their truncation is generally a direct consequence of the interstate system, and we ARE looking at where the interstates go, so...

Disagree to some extent.  The fact that I-77 was essentially built over US 21 in Ohio pretty much reinforces that US 21 was an important route.  If I-77 weren't designated, US 21 would most likely have been built over the same route, at least in Ohio.  Maybe the right way to approach this would be to use existing segments of US routes that were truncated in the state in question, once again because they were made redundant by the Interstate system.  That would nix US 66 and US 99, since they no longer exist, but allow consideration of US routes 40, 50, 60, 70, 80, and 90 in California, for example.

The surviving extent of US 25 is fair game though, since it does technically still enter Ohio (ends at the foot of the bridge on the Ohio side of the river).

Also I note a few unshaded counties on the map within Ohio, which are not traversed by a US or interstate highway but which are traversed by Ohio state highways. Are you including these in your total? I would say they should be included.

I would argue that either none of the counties within the state in question should be counted or they all should.  The original poster regarding Illinois said it was OK to count all of the counties in Illinois, so that's probably the way to go.  It is, however, worth counting it the other way, too.  Routes that emanate from Indiana and Ohio reach more counties than those from Texas do, and Missouri and Texas are almost even with each other.

[Some one]

I would argue it is bogus to consider the former rather than current extent of US highways. After all, their truncation is generally a direct consequence of the interstate system, and we ARE looking at where the interstates go, so...

Disagree to some extent.  The fact that I-77 was essentially built over US 21 in Ohio pretty much reinforces that US 21 was an important route.  If I-77 weren't designated, US 21 would most likely have been built over the same route, at least in Ohio.  Maybe the right way to approach this would be to use existing segments of US routes that were truncated in the state in question, once again because they were made redundant by the Interstate system.  That would nix US 66 and US 99, since they no longer exist, but allow consideration of US routes 40, 50, 60, 70, 80, and 90 in California, for example.

US 90 never went anywhere west of Texas.

[Konza]

You are, of course, correct.