Unusually numbered routes

[apeman33]

K-383 is the only K-route with a number 300 or higher. On the other hand, it was once U.S. 383, so they just simply changed what kind of highway it was.

I thought I saw a K-368 sign for Pomona State Park...maybe an error sign?

No...you're right. I forgot about K-368 and I've passed by it several times.

[DJ Particle]

About NJ-400+ routes...

The GSP is Route 444 if I recall...

[Some one]

OSR in Texas comes to mind.

There's also Nasa Road 1, Beltway 8, and Loop 1604.

[US 89]

OSR in Texas comes to mind.

There's also Nasa Road 1, Beltway 8, and SH 1604.

Add PA 1502 (Wurzbach Parkway) to that list as well.

[wxfree]

Texas doesn't have a numbering system, so unusual numbers would be those that are well above the consecutive numbers.  The FM system has high numbers, and is the source of some of the high numbers in other systems.  State highways go up to 365, and then there are 495, 550, and 824.  SH 824 was renumbered to 24.  The minute order gives no information as to why that number was selected.  It was not near FM 824.  SH 495 was previously FM 495.  SH 550 is  a weird one.  According to the designation files, it was designated in Minute Order 21014, which is the 1945 minute order that designated the Interstate Highway System.  It didn't designate any highways, it just describes a system to be proposed to the Public Roads Administration.  That's my analysis, but according to the designation files, it designated SH 550 without mentioning it.  It was possibly going to be an Interstate along the US 80 Interstate highway in Fort Worth and Dallas.

There are some high loop and spur numbers.  Spur 1570 is an extension of FM 1570.  Loop 1604 is also a result of FM conversion.  Spur 1966 is unexplained.

[hotdogPi]

Spur 1966 is unexplained.

https://en.wikipedia.org/wiki/Texas_State_Highway_Spur_1966

It's the year 1966.

[kphoger]

SH 1604

This does not exist.  "SH" means "State Highway".
1604 is a "State Highway Loop", which is abbreviated "SL".

As wxfree explained, its number is the result of mileage being transferred from FM 1604.

Highway Designation File

STATE HIGHWAY LOOP NO. 1604

Minute Order 072928, dated 06/30/1977; Adm. Ltr. 008-1977, dated 08/15/1977

San Antonio Loop - From IH 10, east of San Antonio, circumferentially around San Antonio to the point of beginning. (Bexar County)  New designation; mileage transferred from FM 1604.

http://www.dot.state.tx.us/tpp/hwy/sl/sl1604.htm

[Some one]

SH 1604

This does not exist.  "SH" means "State Highway".
1604 is a "State Highway Loop", which is abbreviated "SL".

As wxfree explained, its number is the result of mileage being transferred from FM 1604.

Highway Designation File

STATE HIGHWAY LOOP NO. 1604

Minute Order 072928, dated 06/30/1977; Adm. Ltr. 008-1977, dated 08/15/1977

San Antonio Loop - From IH 10, east of San Antonio, circumferentially around San Antonio to the point of beginning. (Bexar County)  New designation; mileage transferred from FM 1604.

http://www.dot.state.tx.us/tpp/hwy/sl/sl1604.htm

Fixed

[TheGrassGuy]

About NJ-400+ routes...

The GSP is Route 444 if I recall...

PIP = NJ 445
ACE = NJ 446
NJTP = NJ 700

[TheOneKEA]

The state of Maryland has a system for its lowest-numbered state route range, which is 2 through 37. The lowest of these numbers, 2 through 6, are mostly contained within the southern part of the state; more specifically, south of Washington, DC and Annapolis. It goes on through the Eastern Shore, the Baltimore metro area, and central and western Maryland. The Eastern Shore's number range is 12 through 21, and Western Maryland is supposed to contain routes 33 through 37. But several decades ago, routes 17 and 33 were swapped. So, MD-17 is in Frederick and Washington counties in the western part of the state, and MD-33 is in Talbot County on the Eastern Shore. They should conventionally be the other way around.

Maryland had a system for all route numbers all the way up to MD 379, but that system had a few oddities in it right from the beginning, especially for the low-digit numbers.

MD 7 was left unassigned until it was used for the segments of US 40 northeast of Baltimore after Pulaski Highway was built
MD 8 was left unassigned for many years until it was assigned to the Kent Island segment of MD 33
MD 9 was originally assigned to a short segment connecting to WV 9 in Allegany County, and then dropped in 1970 and left unassigned
MD 10 was left unassigned until the construction of its current route in Anne Arundel County in the 1970s

In addition, the Maryland State Roads Commission did not duplicate any of the US highway designations that existed in the state at the time, so there has never been (AFAIK) a highway deliberately marked MD 1, 11, 13, 15, 40, 50, 113, 219, 220, 240, 340, or 522.

[dlsterner]

Maryland had a system for all route numbers all the way up to MD 379, but that system had a few oddities in it right from the beginning, especially for the low-digit numbers.

MD 7 was left unassigned until it was used for the segments of US 40 northeast of Baltimore after Pulaski Highway was built
MD 8 was left unassigned for many years until it was assigned to the Kent Island segment of MD 33
MD 9 was originally assigned to a short segment connecting to WV 9 in Allegany County, and then dropped in 1970 and left unassigned
MD 10 was left unassigned until the construction of its current route in Anne Arundel County in the 1970s

In addition, the Maryland State Roads Commission did not duplicate any of the US highway designations that existed in the state at the time, so there has never been (AFAIK) a highway deliberately marked MD 1, 11, 13, 15, 40, 50, 113, 219, 220, 240, 340, or 522.

There was speculation (not sure if any proof exists?) that MD 9 would be the new designation for US 140 after its decommisioning.  Instead, it became MD 140 and MD 97.

The "no duplication of US and state roads" ended after the portion of US 222 between Conowingo and Perryville was turned back to the state, becoming MD 222.  The portion of US 222 north of Conowingo was unaffected.

[TheGrassGuy]

Maryland had a system for all route numbers all the way up to MD 379, but that system had a few oddities in it right from the beginning, especially for the low-digit numbers.

MD 7 was left unassigned until it was used for the segments of US 40 northeast of Baltimore after Pulaski Highway was built
MD 8 was left unassigned for many years until it was assigned to the Kent Island segment of MD 33
MD 9 was originally assigned to a short segment connecting to WV 9 in Allegany County, and then dropped in 1970 and left unassigned
MD 10 was left unassigned until the construction of its current route in Anne Arundel County in the 1970s

In addition, the Maryland State Roads Commission did not duplicate any of the US highway designations that existed in the state at the time, so there has never been (AFAIK) a highway deliberately marked MD 1, 11, 13, 15, 40, 50, 113, 219, 220, 240, 340, or 522.

There was speculation (not sure if any proof exists?) that MD 9 would be the new designation for US 140 after its decommisioning.  Instead, it became MD 140 and MD 97.

The "no duplication of US and state roads" ended after the portion of US 222 between Conowingo and Perryville was turned back to the state, becoming MD 222.  The portion of US 222 north of Conowingo was unaffected.

Is that the only duplicate in MD, or are there others?

[dlsterner]

Maryland had a system for all route numbers all the way up to MD 379, but that system had a few oddities in it right from the beginning, especially for the low-digit numbers.

MD 7 was left unassigned until it was used for the segments of US 40 northeast of Baltimore after Pulaski Highway was built
MD 8 was left unassigned for many years until it was assigned to the Kent Island segment of MD 33
MD 9 was originally assigned to a short segment connecting to WV 9 in Allegany County, and then dropped in 1970 and left unassigned
MD 10 was left unassigned until the construction of its current route in Anne Arundel County in the 1970s

In addition, the Maryland State Roads Commission did not duplicate any of the US highway designations that existed in the state at the time, so there has never been (AFAIK) a highway deliberately marked MD 1, 11, 13, 15, 40, 50, 113, 219, 220, 240, 340, or 522.

There was speculation (not sure if any proof exists?) that MD 9 would be the new designation for US 140 after its decommisioning.  Instead, it became MD 140 and MD 97.

The "no duplication of US and state roads" ended after the portion of US 222 between Conowingo and Perryville was turned back to the state, becoming MD 222.  The portion of US 222 north of Conowingo was unaffected.

Is that the only duplicate in MD, or are there others?

To the best of my knowledge, as far as US vs MD routes are concerned.  Although the MD Roads website http://www.mdroads.com/routes/200-219.html suggests an unsigned MD 219 near US 219.

Maryland has no qualms about duplicates between state routes and interstates, however.  Most are separated by enough distance and don't cause confusion.  On the other hand, there is a sign on westbound I-70 reminding travelers heading to I-68 to not take MD 68 by mistake.

[Perfxion]

US101, the original 3d, 2dh.

[mrcmc888]

DE-141 and 202.  Three digit routes in Delaware are always ones that connect to a same-numbered route in another state, or used to connect to one.  DE-202 is an old alignment of US 202 and is the only route in Delaware to be numbered like that.  Apparently 141 was numbered that way because it was a former bypass of DE-41, which makes it odder since all other state route bypasses have always been signed Alternate DE-xx.

[Max Rockatansky]

US101, the original 3d, 2dh.

But it's really not all that weird in the context that it was still an X1 Route to denote that it was a major north/south US Route.  Had it been US 99 the whole concept of the X1 Routes would have been mute. 

[Road Hog]

Texas doesn't have a numbering system, so unusual numbers would be those that are well above the consecutive numbers.  The FM system has high numbers, and is the source of some of the high numbers in other systems.  State highways go up to 365, and then there are 495, 550, and 824.  SH 824 was renumbered to 24.  The minute order gives no information as to why that number was selected.  It was not near FM 824.  SH 495 was previously FM 495.  SH 550 is  a weird one.  According to the designation files, it was designated in Minute Order 21014, which is the 1945 minute order that designated the Interstate Highway System.  It didn't designate any highways, it just describes a system to be proposed to the Public Roads Administration.  That's my analysis, but according to the designation files, it designated SH 550 without mentioning it.  It was possibly going to be an Interstate along the US 80 Interstate highway in Fort Worth and Dallas.

There are some high loop and spur numbers.  Spur 1570 is an extension of FM 1570.  Loop 1604 is also a result of FM conversion.  Spur 1966 is unexplained.

I've never understood why TxDOT made the connection between FM 1570 and US 380 a spur. It should all be FM 1570. It's the same road; it even has the same number!

[kphoger]

I've never understood why TxDOT made the connection between FM 1570 and US 380 a spur. It should all be FM 1570. It's the same road; it even has the same number!

Is there a fundamental difference between FM highways and State Spur highways?  Are they funded differently, maintained differently, anything like that?

[webny99]

SH 1604

This does not exist.  "SH" means "State Highway".
1604 is a "State Highway Loop", which is abbreviated "SL".

When I was there locals called it "Loop 1604". I thought that was kind of cool, because you would never get that if it had an interstate shield.

[Max Rockatansky]

The "S"  spur routes came to mind for Arizona.  Normally they aren't signed like AZ 89AS on Fain Road but some like AZ 95S over Parker Dam are (or were, it's been years).  Arizona also has unsigned "X"  routes line US 60X for Highways that haven't been fully relinquished from ADOT inventory. 

[US 89]

Arizona also had SR 89L, which was basically a business loop off US 89 in Page and was the only route to ever get an L suffix. Apparently the loops in Phoenix aren’t officially considered Arizona State Loop Routes.

[Max Rockatansky]

Arizona also had SR 89L, which was basically a business loop off US 89 in Page and was the only route to ever get an L suffix. Apparently the loops in Phoenix aren't officially considered Arizona State Loop Routes.

Fortunately the internet has preserved the field signage:

https://www.arizonaroads.com/arizona/az89L.html