State Routes signed like 3di

[robbones]

I know there is a thread similar to this topic on fictional highways, but this topic is to see what SR is signed as a 3di. For example, TN 840 is signed like I 840 and IL 394 is signed like I 394. What other SR follow this pattern?

[NE2]

What's the difference in signage between a 3DI and a state highway? Or do you mean they use the wrong shield?

[agentsteel53]

Nevada has Clark County 215.  California has former/future/who knows I-905, which is currently signed as CA-905.

[SSOWorld]

Some are in anticipation of a future Interstate, others - are probably failed efforts.

[JustDrive]

California also has SR 110 and SR 238/I-238

[empirestate]

I'm still not sure I'm clear on the question, but I can offer the reverse: I-878 is signed like a state route, NY 878.

We've certainly covered the topic of state routes whose numbering is derived from the 3di system, but I can't think of any cases where one is signed as such.

[NE2]

We've certainly covered the topic of state routes whose numbering is derived from the 3di system, but I can't think of any cases where one is signed as such.

MD 695 between I-97 and I-95 (northeast junction) is signed as I-695.

[briantroutman]

If we're talking about freeways signed as state routes, but with three-digit numbers that would fit into the grid as Interstates, Pennsylvania has PA 581 west of Harrisburg and PA 576 west of Pittsburgh.

PA 378 in Bethlehem was at one time I-378 but was downgraded to state route status when I-78 was rerouted from the Lehigh Valley Throughway (US 22) to a new alignment south of the city.

[robbones]

That is what I'm talking about briantroutman.

[The High Plains Traveler]

MN-610 is a mostly completed freeway around the northwest side of the Twin Cities. Only the westernmost link to I-94 has yet to be constructed (and it's about to begin). The east end is U.S. 10, hence the 610 number. It mirrors I-694.

This what you're after?

[Alex]

I think he is referring to numbered state route freeways with 3di implications, sort of like the state route extensions of Interstates such NY 390, NY 590, NY 481, IL 255, etc.

There are not a lot of candidates for this overall.
The Pennsylvania examples are already covered.
Vermont has two:

VT 191, though its not a full freeway but acts like a spur.
VT 289, meant to be I-289

[empirestate]

We've certainly covered the topic of state routes whose numbering is derived from the 3di system, but I can't think of any cases where one is signed as such.

MD 695 between I-97 and I-95 (northeast junction) is signed as I-695.

Ah! Well, there you go.

If we're talking about freeways signed as state routes, but with three-digit numbers that would fit into the grid as Interstates, Pennsylvania has PA 581 west of Harrisburg and PA 576 west of Pittsburgh.

That is what I'm talking about briantroutman.

Oh, well in that case, we surely must have covered that before in this forum...no?

[adventurernumber1]

I agree with Alex in that there are surely a lot of candidates for this indeed.

Idk if proposed roads like this could count, but: Of my years of digging through the Internet searching up proposals for an outer Atlanta Beltway, IIRC, one of the numbering possibilities for the possible road was GA SR 485, which could also fit into the grid as I-485.

[Pink Jazz]

Virginia has SR 164 in the Hampton Roads area, and SR 895 in the Richmond area.  SR 895 was supposed to get an Interstate designation, but some screw up by the state prevented that from happening.  In addition, the numbering of SR 895 violates Virginia's state route numbering convention, as normally primary routes have numbers below 600.

[rickmastfan67]

There's SC-277 in Columbia, SC that's a spur off of I-77.  Should be posted as an Interstate between I-77 & I-20 IMO.

[robbones]

AR has SR 440, 530, and 549. 440 is an extension of I 440, 530 is the future extension of I 530 (if I 69 ever gets built), and 549 is future I 49.

[vtk]

I don't think Ohio has any examples, though there are and have been several state routes that follow the 3dI pattern but with a US route as the parent.

[adventurernumber1]

I just noticed two possible candidates in the St. Louis area (SR 364 & SR 370):

http://prntscr.com/5aodp5

[US71]

There's an AR 164 which branches off US 64 near Clarksville.

Carrroll County has AR 221 which crosses AR 21.

[froggie]

VT 289, meant to be I-289

Roadgeek legend.  Did some research on this after I retired up here and concluded that VT 289 was never intended to be an Interstate (the "ultimate design" in the Circ Draft EIS made this abundantly clear).  The initial idea of an "I-289" came from an MTR regular contributing to Kurumi's site.

Virginia has SR 164 in the Hampton Roads area, and SR 895 in the Richmond area.  SR 895 was supposed to get an Interstate designation, but some screw up by the state prevented that from happening.  In addition, the numbering of SR 895 violates Virginia's state route numbering convention, as normally primary routes have numbers below 600.

164 would theoretically fit, but its numbering in this particular case is coincidental.  The Hampton Roads area is where the VA 16x routes are concentrated, and there's been a VA 164 in the area dating back to the mid-1930s.

As for 895, yes it technically violates the state route numbering system, but the number was approved by the Commonwealth Transportation Board, in part since Chesterfield nor Henrico Counties had a SR 895.  Thus far, CTB has decided not to change it.

[dgolub]

NY 495 is signed as I-495.  It's the Lincoln Tunnel and it turns into NJ 495, both in terms of its official designation and what it's sign as, when it crosses the state line.

[robbones]

Joplin, Missouri has MO 249

[jp the roadgeek]

CT had CT 291 from I-91 in Windsor to US 5 in South Windsor in anticipation of I-291 being finished (which it was from Windsor to Manchester).  CT 184 and 195 have no relations to the 2DI, but one wonders if there is an unintentional connection between I-91 and CT 191.  CT 244 is an old routing of US 44, and CT 302 is an old routing of US 202, so there are connections there.

[briantroutman]

It's not a freeway by any stretch of the imagination, but I've wondered whether PennDOT selected the PA 290 designation for Erie's Bayfront Connector because it serves much the same function an Interstate 290 would. It's both a loop into the city from I-90 and a connector to I-79.

[kurumi]

... CT 244 is an old routing of US 44 ...

Sorry, have to refute that one. US 44 has taken the same route through Ashford and Pomfret since its designation in 1935. Future CT 244 is the unimproved road passing by Ragged Hill:


Even in the 1920s, SH 101 followed today's US 44 alignment, and future CT 244 didn't appear on the map [1927 here]: