Old Alignments of 1 or 2 digit routes with 3di style numbering

[NWI_Irish96]

IN 930 is an old alignment of US 30 through Fort Wayne
IN 931 are old alignments of US 31 through Lakeville and Kokomo
IN 933 is an old alignment of US 33 through South Bend and Mishawaka

[hotdogPi]

MA 203 (former MA 3)

[ilpt4u]

Pretty sure at least parts of IL 250 are old alignments of US 50. Don't think the whole route is, tho

[US71]

Pretty sure at least parts of IL 250 are old alignments of US 50. Don't think the whole route is, tho

IL 251 is old US 51

Mattoon, IL used to have IL 316 that was old IL 16, but it's been decommissioned.

[wanderer2575]

Most of M-227 in Michigan used to be part of US-27.  (The weird westward jog at the northern end is inexplicable.)

[jmd41280]

PA 760: When the freeway/tollway portion of PA 60 got taken over by the I-376 extension, there were 2 non-highway segments of PA 60 remaining. The southern segment near Pittsburgh remained PA 60 and the northern segment near Sharon was renumbered as PA 760.

[ilpt4u]

Pretty sure at least parts of IL 250 are old alignments of US 50. Don't think the whole route is, tho

IL 251 is old US 51

Only reason I didn't mention IL 251 and IL 351 in relation to US 51 is because it was mentioned earlier, back when this thread was originally alive in 2011

[Dirt Roads]

A twist on this theme:  WV-817 was formerly US-35, but is numbered such after originally being WV-17.  After the Silver Bridge Disaster, the DOH got approval to swap US-35 to the south side of the Kanawha River to meet up with the new Silver Bridge (sometime late 1969 or early 1970).  The number WV-17 was reused after US-119 was relocated onto Corridor G north and east of Logan about 1976.

[Great Lakes Roads]

IN 930 is an old alignment of US 30 through Fort Wayne
IN 931 are old alignments of US 31 through Lakeville and Kokomo
IN 933 is an old alignment of US 33 through South Bend and Mishawaka

A couple more from Indiana:

IN 106: old alignment of US 6 through Bremen
IN 263: old alignment of SR 63 before the four-lane realignment around West Lebanon
IN 340: old alignment of US 40 before the four-lane realignment around Billtown and Clovertown

[Route66Fan]

In Missouri, there is MO 224 from East of Lexington, MO to West of Napoleon, MO, which was originally US 24 from 1927 to 1959.

[hbelkins]

Kentucky has been doing this of late, but using four-digit routes.

KY 2227 -- old alignment of US 27 north of Somerset (which is actually on its third alignment, the original being KY 1247).
KY 3630 -- old alignment of KY 30 in Jackson and Laurel counties.
KY 2750 -- old alignment of US 150 between Stanford and Mt. Vernon.

The location of KY 162 makes me wonder if perhaps it's not an old alignment of US 62 between Bardstown and Bloomfield.

[ilpt4u]

The location of KY 162 makes me wonder if perhaps it's not an old alignment of US 62 between Bardstown and Bloomfield.

I had that thought about IL 145 in relation to US 45 in Southern Illinois between Harrisburg and Metropolis, but when I looked it up, that doesn't appear to be the case.

I'm not even sure that the 145 number was given as a relation to US 45, as that part of Southern IL is where the 140s are anyway. 145 intersects 146 and 147, for example

[Dirt Roads]

NC routes:

US 25 -> NC 225
NC 26 -> NC 226
NC 26A -> NC 226A
NC 42 -> NC 142
NC 57 -> NC 157
NC 77 -> NC 177
US 17-1 -> US 117
US 321 -> US 421

Mapmikey

Previously in North Carolina the former NC-681 was a renumbering of NC-68.  The route was renumbered again in the early 1940s and is now part of multi-state WV/VA/NC-16.

[wanderer2575]

Two more for Michigan:

M-247 once was part of M-47 before the latter was redesignated over a different corridor.

Most recently, M-343 northeast of Kalamazoo was once part of M-43.

[ozarkman417]

Another MO example- Much of the old Route 13 south of Springfield is now Route 413.

[PHLBOS]

MA 225 was the original MA 25.
MA 124 was the original MA 24.

[Big John]

When WI 13 was separated into 3 segments, The longest segment remained as WI 13, but the other 2 segments became WI 113 and WI 213.

[BrianP]

This doesn't happen often in MD since many of the 3 digit numbers are taken.  So former alignments typically have an unassociated 3 digit number.

But there are some:
The most visible one is MD 924 and MD 24.  MD 924 even shows up on the I-95 exit for MD 24.
MD 80 / MD 880.
MD 949 is an unsigned severed piece of MD 49. 
MD 936 / 36
MD 832 is a severed former piece of 32
MD 750 / US 50
Here's an interesting one.   An old alignment of MD 2/MD 4 is MD 524.

[US71]

3 more in Arkansas:

AR 365 is old US 65 (Conway to Pine Bluff)

AR 367 is old US 67 (Cabot to Walnut Ridge)

AR 329 from Lockesburg to DeQueen was an original alignment for US 71

[sbeaver44]

Other than the PA 760 example someone mentioned earlier, I don't think PA generally does this unless we get into comparing the Quadrant Routes to their newer parallel State Routes.

In NY, US 15's old alignment is Steuben County 115.

[Dirt Roads]

Forgot about these in my old backyard.  WV-114 is a renumbering of WV-14 along the Greenbrier Street cutoff from the town of Big Chimney down to the State Capitol.  Yes, there really was a big chimney right up against Elk River Road.  At the same time, WV-14 south of Charleston got renumbered as WV-214.  The portion of WV-214 running up Oakwood Road along Ferry Branch a few hundred yards to the new exit got renumbered as US-119 running backwards when the new I-64 Fort Hill Bridge opened in the mid-1970s.  When the remainder of Corridor G opened, the section of WV-214 from the exit to Davis Creek got renumbered as US-119 and the Ferry Branch portion became unsigned US-119 Connector (posted as TO US-119).

Simplified:  After I-64 was completed, US-119 southbound out of Charleston ran across the Fort Hill Bridge and took Exit 58A and then turned left (north) onto Oakwood a short piece to mulitplex with WV-61 southbound all the way down to the Marmet exit of the Turnpike.  WV-214 turned right onto Oakwood.  After Corridor G was completed, US-119 still took Exit 58A but then turned right onto Oakwood (replacing WV-214 down to Davis Creek).