State routes that are a continuation of same-numbered US routes

[NWI_Irish96]

Indiana does not duplicate numbers between US routes and state routes, so this would only be possible if a US route ended at exactly the state line, which does not happen.

There are three US routes that do continue as state routes with different numbers:
US 27 as IN 3
US 131 as IN 13
US 224 as IN 5

I'm surprised that Indiana duplicates Interstate highways and state roads. The biggest example of being confused with that is IN-64 and I-64 not only running within 20 miles of each other for IN-64's entire length but starting at I-64 on the east end. I mean couldn't they have picked another number for IN-64?

IN 64 already existed when I-64 got built, and I guess they decided that an interstate and state highway are different enough that there wouldn't be a ton of confusion.

65, 69 and 70 are similarly duplicated but don't have the same proximity issues.

[Rothman]

I find it so cool that US 222 at both ends have state designations of the route in two different states.  Considering that those in the Mid Atlantic do not pay attention to detail in designations, its all Route 222 at both ends anyway.

That is why NY and I-481 and NY 481 defaulting into each other without conflict near Syracuse including I-690 and NY 690, or I-787 and NY 787 at Cohoes.

Not I-787.  I-787 follows the Collar City Bridge.

[Flint1979]

Indiana does not duplicate numbers between US routes and state routes, so this would only be possible if a US route ended at exactly the state line, which does not happen.

There are three US routes that do continue as state routes with different numbers:
US 27 as IN 3
US 131 as IN 13
US 224 as IN 5

I'm surprised that Indiana duplicates Interstate highways and state roads. The biggest example of being confused with that is IN-64 and I-64 not only running within 20 miles of each other for IN-64's entire length but starting at I-64 on the east end. I mean couldn't they have picked another number for IN-64?

IN 64 already existed when I-64 got built, and I guess they decided that an interstate and state highway are different enough that there wouldn't be a ton of confusion.

65, 69 and 70 are similarly duplicated but don't have the same proximity issues.

Hmm I guess since the state roads already had their numbers first that makes sense. IN-64 is called Indiana 64 to offset the difference though.

There's also former IN-35 which is now IN-135 since US-35 enters the state.

[Flint1979]

Indiana does not duplicate numbers between US routes and state routes, so this would only be possible if a US route ended at exactly the state line, which does not happen.

There are three US routes that do continue as state routes with different numbers:
US 27 as IN 3
US 131 as IN 13
US 224 as IN 5

I'm surprised that Indiana duplicates Interstate highways and state roads. The biggest example of being confused with that is IN-64 and I-64 not only running within 20 miles of each other for IN-64's entire length but starting at I-64 on the east end. I mean couldn't they have picked another number for IN-64?

IN 64 already existed when I-64 got built, and I guess they decided that an interstate and state highway are different enough that there wouldn't be a ton of confusion.

65, 69 and 70 are similarly duplicated but don't have the same proximity issues.

I'm wondering why I-64 didn't just replace IN-64 since the run in the same area. The towns could have been bypassed and a BL on the old part of the highway through those towns.

[ilpt4u]

65, 69 and 70 are similarly duplicated but don't have the same proximity issues.

IN 69 is decently close to I-69 in SW Indiana

[ilpt4u]

I'm wondering why I-64 didn't just replace IN-64 since the run in the same area. The towns could have been bypassed and a BL on the old part of the highway through those towns.

Too far north. The only reason I-64 is on the alignment it is on is due to intense lobbying by Evansville, IN and Mt Vernon, IL

The original alignment followed US 50 in IL and US 150 in IN

[zzcarp]

Michigan has none

False. M-24 is a northward expansion of US 24.

No it's not, they don't even connect how would that be an extension of US-24? US-24 ends at I-75 and the roadway that it's on (Dixie Highway) continues towards Flint. M-24 starts in Auburn Hills and goes north to Unionville.

US 24 and M24 ended at each other for years south of central Pontiac.

Um ok and they no longer do and haven't in almost 60 years. This post says state routes that ARE a continuation of the same numbered US routes, says nothing about former routes. My original comment was not false.

30 years maybe. They ended at or near each other until US 10 was truncated and US 24 extended in the late 80s. Another former one was US 25 and M-25 back in the day. That ended 50 years ago.

[zzcarp]

One in Colorado-as a technicality-is at Byers. US 36 "ends" at I-70 in Byers and continues as CO 36 (former US 36/40/287) to I-70 west of Watkins. Since Colorado does not sign most overlaps or include them in their route log, it technically fits.

[vdeane]

I find it so cool that US 222 at both ends have state designations of the route in two different states.  Considering that those in the Mid Atlantic do not pay attention to detail in designations, its all Route 222 at both ends anyway.

That is why NY and I-481 and NY 481 defaulting into each other without conflict near Syracuse including I-690 and NY 690, or I-787 and NY 787 at Cohoes.

Not I-787.  I-787 follows the Collar City Bridge.

I-787 is odd in that its signed endpoints and actual endpoints don't match.  With respect to the north end, while it officially follows the Collar City Bridge, the signage mostly does not, and I'm not sure how many people even realize that it does.  Only I-787 south is signed for the official endpoint - NY 787 south and I-787 north are not.

A similar thing happens on the south end; officially it ends at the Thruway, but this is signed as "exit 1" with signage instead heading to US 9W on a reference route.

[dvferyance]

65, 69 and 70 are similarly duplicated but don't have the same proximity issues.

IN 69 is decently close to I-69 in SW Indiana

I would make that IN-79. If Indiana had a 79 that is where it should be the western most point in the state.

[Max Rockatansky]

AZ 93 was a continuation of US 93.  AZ 95 functionally was an extension of US 95 and actually became part of it south of Quartzsite.  US 89 and AZ 89A kind of function that way now but are separated by a couple blocks in Flagstaff.  In the case of 89A that was from truncation of US 89 and lazy state highway numbering. 

[Flint1979]

Michigan has none

False. M-24 is a northward expansion of US 24.

No it's not, they don't even connect how would that be an extension of US-24? US-24 ends at I-75 and the roadway that it's on (Dixie Highway) continues towards Flint. M-24 starts in Auburn Hills and goes north to Unionville.

US 24 and M24 ended at each other for years south of central Pontiac.

Um ok and they no longer do and haven't in almost 60 years. This post says state routes that ARE a continuation of the same numbered US routes, says nothing about former routes. My original comment was not false.

30 years maybe. They ended at or near each other until US 10 was truncated and US 24 extended in the late 80s. Another former one was US 25 and M-25 back in the day. That ended 50 years ago.

M-24 was scaled back to end where it does now when I-75 was built.

[idk]

OR 99(and OR 99E/W) was once part of US 99(and E/W)

[Rover_0]

Near the other end of US-24: while UT-24 never directly connected to US-24, it seemed to be an unofficial continuation, given that the eastern portions of UT-24 were built not long after the planned 1955 US-24 extension into Utah.