2 Numbered Highways going between the same 2 points.

[roadman65]

I-610 and I- 10 in NOLA.

[SkyPesos]

A 2di and a child (mainly first digit even) 3di meeting at two points are way too common for this thread. Especially full beltways. I-270 in Columbus goes between the same two points as I-70, I-71, US 23, US 33, US 40, US 62, OH 3 and OH 161.

Speaking of beltways, and regarding the OP with Arizona, how about AZ 101 and AZ 202?

[roadman65]

Then you have US 9W and NY 32 between Newburgh and Kingston. US 4 and NY 32 between Mechanicsville and Schuylerville.

[Dirt Roads]

Did we get this far into this thread and still forget the triplicate I-95/US-29/US-1 between Washington and Baltimore?  Or did I just open up another Baltimore can of worms? 

[Roadgeekteen]

I-95 and I-93 between Canton and Woburn.

Countless other bypasses and beltways.

[MCRoads]

Have I-41 and I-43 already been mentioned? Because if not, I-41 and I-43 between Green Bay and Milwaukee.

[wanderer2575]

Some more in Michigan:

I-69 and I-94 between Marshall and Port Huron.
I-75 and US-23 between Mackinaw City and Standish (in addition to between Standish and Perrysburg, OH as mentioned earlier).
I-94 and M-3 between Chesterfield Township and Detroit.
US-41 and M-35 between Menominee and Escanaba.
US-23 and M-65 between Rogers City and Omer.
M-22 and M-72 between Empire and Traverse City.
M-22 and M-109 between Empire and Glen Arbor.
M-22 and M-204 between Leland and Suttons Bay.
M-25 and M-142 between Bay Port and Harbor Beach.

[roadman65]

US 441 has many already mentioned but at McRae, GA it intersects US 23 and then further north it overlaps into NC.

Then between Perry,GA and Barnesville, GA US 41 and 341, transit between.
Also US 23 and 41 between Macon and Atlanta.
Then US 23 and I-75 between Macon and Toledo.

[US 89]

Before today, the last time somebody posted in this thread, Obama had been president for a little over a year and the iPhone 4 was hot new technology.

[CNGL-Leudimin]

Have I-41 and I-43 already been mentioned? Because if not, I-41 and I-43 between Green Bay and Milwaukee.

At the time this thread was created, it was US 41 and I-43. Technically still is.

[Flint1979]

A 2di and a child (mainly first digit even) 3di meeting at two points are way too common for this thread. Especially full beltways. I-270 in Columbus goes between the same two points as I-70, I-71, US 23, US 33, US 40, US 62, OH 3 and OH 161.

Speaking of beltways, and regarding the OP with Arizona, how about AZ 101 and AZ 202?

LOL I was going to be a smartass and post one but I thought that's too easy.

[Flint1979]

Before today, the last time somebody posted in this thread, Obama had been president for a little over a year and the iPhone 4 was hot new technology.

And the user (SkyPesos) that posted was only about 7 years old at the time considering he's 18 now.

[hbelkins]

US 25 and US 27 in addition to I-75 between Lexington and Cincinnati.

Given the original post mentioned only intrastate routings, I did not mention US 27 and US 127 between Cincy and Chattanooga.

The US 25 example is historical, of course, since the route now ends at the Ohio foot of the Clay Wade Bailey Bridge. I really don't understand why Kentucky just doesn't truncate it back to Florence, where it intersects US 42/127.

Speaking of US 25 and 27, though, I know I have seen at least one map that referred to the two routes between Lexington and Cincinnati as a second version of US 25E and 25W. I don't remember, however, if US 27 was an Ohio-Indiana-Michigan route, or if it ran south from Lexington through Tennessee, Georgia, and Florida.

That may have been a mapmaker jumping the gun, though, the same way US 37 and some other routes have appeared on maps.

[SkyPesos]

US 25 and US 27 in addition to I-75 between Lexington and Cincinnati.

Given the original post mentioned only intrastate routings, I did not mention US 27 and US 127 between Cincy and Chattanooga.

The US 25 example is historical, of course, since the route now ends at the Ohio foot of the Clay Wade Bailey Bridge. I really don't understand why Kentucky just doesn't truncate it back to Florence, where it intersects US 42/127.

Speaking of US 25 and 27, though, I know I have seen at least one map that referred to the two routes between Lexington and Cincinnati as a second version of US 25E and 25W. I don't remember, however, if US 27 was an Ohio-Indiana-Michigan route, or if it ran south from Lexington through Tennessee, Georgia, and Florida.

That may have been a mapmaker jumping the gun, though, the same way US 37 and some other routes have appeared on maps.

US 27 was probably an Ohio-Indiana-Michigan route, as USEnds mentioned that the first southern terminus of US 27 was in Cincinnati.

This is going into fictional, but I would decommission US 42, have US 25 take over the Ohio section to Cleveland, and US 22 take over the Kentucky section to Louisville. Eliminates one of the US routes that ends in the Cincinnati area.

[hbelkins]

US 25 and US 27 in addition to I-75 between Lexington and Cincinnati.

Given the original post mentioned only intrastate routings, I did not mention US 27 and US 127 between Cincy and Chattanooga.

The US 25 example is historical, of course, since the route now ends at the Ohio foot of the Clay Wade Bailey Bridge. I really don't understand why Kentucky just doesn't truncate it back to Florence, where it intersects US 42/127.

Speaking of US 25 and 27, though, I know I have seen at least one map that referred to the two routes between Lexington and Cincinnati as a second version of US 25E and 25W. I don't remember, however, if US 27 was an Ohio-Indiana-Michigan route, or if it ran south from Lexington through Tennessee, Georgia, and Florida.

That may have been a mapmaker jumping the gun, though, the same way US 37 and some other routes have appeared on maps.

US 27 was probably an Ohio-Indiana-Michigan route, as USEnds mentioned that the first southern terminus of US 27 was in Cincinnati.

This is going into fictional, but I would decommission US 42, have US 25 take over the Ohio section to Cleveland, and US 22 take over the Kentucky section to Louisville. Eliminates one of the US routes that ends in the Cincinnati area.

I would kill US 25 at Corbin. Mainline US 25 takes over what is now 25E, Newport to Knoxville becomes just US 70, and Knoxville to Jellico reverts to TN 9. I don't know what Kentucky could or would number 25W between Jellico and Corbin -- KY 3725 perhaps. I would turn all of US 25 between Corbin and Florence into a state route, minus the concurrency with US 421.

[jp the roadgeek]

CT/MA/NH 12 and 32 between Norwich, CT and Keene, NH
MA/RI 122 and MA/RI 146 between Worcester and Providence
US 5 and CT/MA 10 between New Haven and Bernardston (duplexed from Northampton to Bernardston)
US 1 and US 202 from Chadd's Ford, PA to Bangor, ME

[roadman65]

US 6 and 44 between Hartford and Providence.

[ftballfan]

Some more in Michigan:

I-69 and I-94 between Marshall and Port Huron.
I-75 and US-23 between Mackinaw City and Standish (in addition to between Standish and Perrysburg, OH as mentioned earlier).
I-94 and M-3 between Chesterfield Township and Detroit.
US-41 and M-35 between Menominee and Escanaba.
US-23 and M-65 between Rogers City and Omer.
M-22 and M-72 between Empire and Traverse City.
M-22 and M-109 between Empire and Glen Arbor.
M-22 and M-204 between Leland and Suttons Bay.
M-25 and M-142 between Bay Port and Harbor Beach.

M-22 and US-31 between Manistee and Traverse City (maybe). I'm not 100% sure if M-22 continues concurrent with M-72 to hit Division Ave in Traverse City

[FrCorySticha]

Crossing multiple states, there's US 12 and I-94 between Miles City, MT and Minneapolis, MN.

[Occidental Tourist]

Arizona DOT does not allow 2 numbered highways to travel between 2 points.
Example: at one time AZ88 and US60 both roads traveled from Apache Junction to Miami today only US60 travels between these Cities, AZ88 ends at Roosevelt at Jct AZ188.

Other Examples
US60 & AZ260 Show Low To Springerville (260 now ends in Eager)
I-10 & AZ84 Downtown Casa Grande to Jct I-10, AZ 84, AZ87 (AZ84 Ends In Downtown Casa Grande at Jct AZ387 & AZ287)

Are there other states that have this rule?

By two points, do you mean two cities or other points of interest?  Just trying to figure out the confines of the rule so as to discern the difference between permissible duplexes (e.g., US-95 and I-10 between Quartzsite and Ehrenberg) and situations not permissible under the rule.

[SeriesE]

Arizona DOT does not allow 2 numbered highways to travel between 2 points.
Example: at one time AZ88 and US60 both roads traveled from Apache Junction to Miami today only US60 travels between these Cities, AZ88 ends at Roosevelt at Jct AZ188.

Other Examples
US60 & AZ260 Show Low To Springerville (260 now ends in Eager)
I-10 & AZ84 Downtown Casa Grande to Jct I-10, AZ 84, AZ87 (AZ84 Ends In Downtown Casa Grande at Jct AZ387 & AZ287)

Are there other states that have this rule?

Looks like this rule bans all alternative bannered routes and loops/beltways?

[skluth]

Have I-41 and I-43 already been mentioned? Because if not, I-41 and I-43 between Green Bay and Milwaukee.

At the time this thread was created, it was US 41 and I-43. Technically still is.

WI 32 and WI 57 also connect Green Bay and Milwaukee. Maybe we need a new thread of cities connected by four or more highways.

[SkyPesos]

Have I-41 and I-43 already been mentioned? Because if not, I-41 and I-43 between Green Bay and Milwaukee.

At the time this thread was created, it was US 41 and I-43. Technically still is.

WI 32 and WI 57 also connect Green Bay and Milwaukee. Maybe we need a new thread of cities connected by four or more highways.

Chicago to Cleveland: I-80, I-90, US 6, US 20 

[NWI_Irish96]

Have I-41 and I-43 already been mentioned? Because if not, I-41 and I-43 between Green Bay and Milwaukee.

At the time this thread was created, it was US 41 and I-43. Technically still is.

WI 32 and WI 57 also connect Green Bay and Milwaukee. Maybe we need a new thread of cities connected by four or more highways.

Chicago to Cleveland: I-80, I-90, US 6, US 20 

If you're talking metro areas, yes, but I-80 doesn't enter either city and US 6 doesn't enter Chicago. You could substitute Hammond for Chicago though as all four go through Hammond.

[SEWIGuy]

Have I-41 and I-43 already been mentioned? Because if not, I-41 and I-43 between Green Bay and Milwaukee.

At the time this thread was created, it was US 41 and I-43. Technically still is.

WI 32 and WI 57 also connect Green Bay and Milwaukee. Maybe we need a new thread of cities connected by four or more highways.

In the case of Green Bay and Milwaukee, it's five. I-41, I-43, US-41, WI-32 and WI-57.