Lowest-numbered route you haven't been on

[oscar]

This weekend, I increased my lowest untraveled number to 643. While traveling new I-66 express lanes, I saw signs for SR 621 and SR 622 in Prince William County, the next untraveled numbers on my list. I went back out there to do some shopping and snag those routes. Some more shopping took me into southeastern Fairfax County, where I spotted a cluster of several more untraveled routes. There's also an SR 643 in a different part of the county, maybe later.

[Rothman]

Just can't catch up to an old Virginian...

oscar	643
formulanone	577
Rothman	451
74/171FAN	432
Mapmikey	429
HTM Duke	386
jayhawkco	379
Konza	378
Duke87	353
Hot Rod Hootenanny	339
cl94	338
hbelkins	334
corco	333
froggie	248
deathtopumpkins	245
dlsterner	232
paulthemapguy	207
US 89	192
Jim	184
plain	174
csw	174
NWI_Irish96	174
rel4	170
hockeyjohn	154
dfilpus	149
A.J. Bertin	148
Thing 342	127
Scott5114	113
Buck87	112
SGwithADD	112
Bitmapped	111
bassoon1986	109
adwerkema	108
SEWIGuy	108
amroad17	107
Great Lakes Roads	107
tq-07fan	107
SD Mapman	107
sparker	102
TheHighwayMan394	102
DandyDan	102
sbeaver44	102
skluth	102
Flint1979	97
hobsini	97
jlam	97
1995hoo	96
clong	89
SkyPesos	89
7/8	88
Bickendan	88
I-55	86
Caps81943	86
chesapeake256	84
webny99	68
Eth	63
flan	54
BrianP	53
mgk920	48
BlueOutback7	48
milbfan	47
noelbotevera	47
Big John	46
ozarkman417	46
texaskdog	42
TBKS1	39
ketchup99	38
averageroadgeek	37
ipeters61	35
Evan_Th	33
FrCorySticha	33
ran4sh	32
Thunderbyrd316	31
doorknob60	29
Ben114	29
Bruce	29
stevashe	29
CNGL-Leudimin	27
ftballfan	26
kphoger	26
mapman1071	24
KEK Inc.	21
jp the roadgeek	19
sharkyfour	19
kurumi	18
Takumi	18
dvferyance	17
1	14
Roadgeekteen	14
RyanB06	14
CoreySamson	14
cwf1701	13
SoDakInterstateEnthusiast	13
kirbykart	13
apeman33	12
JMoses24	12
ClassicHasClass	11
KEVIN_224	11
wxfree	9
computerfan0	9
jeffandnicole	8
PHLBOS	8
TheGrassGuy	8
WillWeaverRVA	8
Tarkus	7
TheStranger	7
Quillz	7
Pink Jazz	6
DeaconG	6
Skye	5
Roadsguy	5
Super Mateo	4
SoCal Kid	3
thspfc	3
LilianaUwU	3
Occidental Tourist	3
Truvelo	2
bzaharin	2
Zeffy	2
Finrod	2
Kulerage	2
Aaron Camp	2
skquinn	2
MCRoads	2
snowc	2
RoadRebel	2
CoolAngrybirdsrio4	2
Hurricane Rex	1
idk	1

[Hot Rod Hootenanny]

Drove on Ohio 339 yesterday, so I'm now up to 346.
Won't affect the standings (for the time being), but gives me a little breathing room in case Josh, H.B, & Corco decide to get back into the game.

[algorerhythms]

My first thought on reading the thread title was, "well, I haven't been on the M-1 in England, so I guess 1?", but that would be much tougher if you had to be on every route 1 for it to count...

So... the first route I can think of having been on for each number...
1: US 1 (in NJ, PA, and who knows where else)
2: MD 2
3: OK 3
4: MD 4
5: NY 5
6: US 6 (in PA)
7: ON 7
8: ON 8
9: US 9 (in NJ)
10: US 10 (in WI)
11: US 11 (in PA)
12: US 12 (in IL, WI)
13: US 13 (in MD, VA)
14: US 14 (in IL, WI)
15: US 15 (in PA)
16: IL 16 (this one took me a while to remember... I was on it briefly while returning from seeing the solar eclipse in 2017)
17: US 17 (in VA)
18: PA 18
19: US 19 (in PA, WV)
20: US 20 (in IL)
21: ON 21
22: US 22 (in PA)
23: US 23 (in OH)
24: I-24 (in TN)
25: US 25 (in KY)
26: IL 26
27: US 27 (in KY)
28: IN 28
29: US 29 (in MD)
30: US 30 (in PA)
31: PA 31
32: WI 32, if being a pedestrian counts
33: US 33 (in OH)
34: US 34 (in IL)
35: US 35 (in OH)
36: MD 36
37: I got bored at this point

[Scott5114]

37: I got bored at this point

S. 4th Street in Moore, or I-44 between Newcastle and OKC? Either would get you a piece of OK-37.

[J N Winkler]

Giving this a whirl:

1:  US 1 (many states)
2:  K-2
3:  US 3 (New Hampshire)
4:  K-4
5:  I-5
6:  US 6 (many states)
7:  K-7
8:  US 8 (Minnesota, Wisconsin)
9:  K-9
10:  K-10
11:  US 11 (New York, Virginia)
12:  US 12 (Washington, Minnesota)
13:  US 13 (Virginia, Maryland)
14:  K-14
15:  K-15
16:  K-16
17:  I-17
18:  K-18
19:  I-19
20:  US 20 (many states)
21:  Colorado SH 21
22:  Alberta Hwy. 22
23:  TH 23 (Minnesota)
24:  US 24 (many states)
25:  I-25
26:  US 26 (many states)
27:  K-27
28:  STH 28 (Wisconsin)
29:  I-29
30:  I-30
31:  US 31W (Kentucky)
32:  K-32
33:  SR 33 (California)
34:  US 34 (Nebraska, Colorado)
35:  I-35
36:  US 36 (Kansas, Missouri)
37:  I-37
38:  NM 38
39:  SR 39 (Oregon)
40:  US 40 (many states)
41:  I-41
42:  K-42
43:  I-43
44:  I-44
45:  I-45
46:  US 46 (New Jersey) (only if the segment over the George Washington Bridge counts)
47:  K-47
48:  SR 48 (Virginia)
49:  I-49
50:  US 50
51:  US 51 (Illinois)
52:  US 52 (Minnesota)
53:  K-53
54:  US 54 (many states)
55:  I-55
56:  US 56 (many states)
57:  K-57
58:  US 58
59:  US 59
60:  US 60 (many states)
61:  K-61
62:  US 62 (many states)
63:  US 63 (Missouri)
64:  US 64 (many states)
65:  US 65 (Minnesota)
66:  SR 66 (former US 66) (many states)
67:  US 67 (many states)
68:  I-68
69:  US 69 (many states)
70:  I-70
71:  I-71
72:  I-72
73:  US 73
74:  I-74
75:  I-75
76:  I-76
77:  I-77
78:  SR 78 (Oregon)
79:  I-79
80:  I-80
81:  I-81
82:  I-82
83:  US 83
84:  I-84
85:  I-85
86:  SR 86 (Arizona)
87:  US 87 (New Mexico)
88:  I-88
89:  US 89 (Utah)
90:  US 90 (Texas)
91:  I-91
92:  SR 92 (Nebraska)
93:  US 93 (Nevada, Idaho)
94:  I-94
95:  US 95 (Idaho)
96:  K-96
97:  US 97 (Oregon, California)
98:  US 98 (Alabama)
99:  I-99
100:  TH 100 (Minnesota)
101:  US 101 (California, Oregon, Washington)

The lowest therefore appears to be 102.

[algorerhythms]

Ah, I had forgotten about OK-37...
So...
37: OK-37
38: MD-38
39: MD-39
40: US 40
41: US 41 (in IL)
42: MD 42
43: I-43
44: I-44
45: I-45
46: WV-46
47: MD-47
48: If former routes that were numbered as such at least one of the times you were on them count, then US-48 (MD)
49: MD-49
50: US-50 (WV)
51: MD-51
52: US-52 (IL)
53: MD-53
54: MD-54
55: MD-55
56: MD-56
57: I-57
58: OK-58
59: US-59 (OK)
60: US-60 (OK)
61: MD-61
62: ON-62
63: MD-63
64: I-64
65: I-65
66: OK-66
67: US-67 (IL)
68: I-68
69: ON-69
70: I-70
71: US-71 (AR) (checking Google Maps... when did they finish the Bella Vista bypass? That wasn't done when I was there, and I wasn't there that long ago.)
72: I-72
73: ??? This might be the winner. In any event, I just realized I started this list at 1:45 and now it's 1:25, so I think it's time to go to bed...

[therocket]

1: CA-1
2: CA-2
3: DR (Dominican Republic)-3
4: I-4
5: I-5
6: National Freeway 6 (Taiwan)
7: MO-7 (via concurrency with I-49)
8: I-8
9: CA-9
10: I-10
11: I-11
12: UT-12
13: MO-13 (via concurrency with US-60)
14: Provincial Highway 14 (Taiwan)
15: I-15
16: Provincial Highway 16 (Taiwan)
17: CA-17
18: CA-18
19: CA-19
20: Québec Autoroute 20
21: California County Route S21
22: CA-22
23: CA-23
24: none
That would make the lowest numbered route I haven't been on 24.

[oscar]

A major Travel Mapping team member, in Europe, claims a lowest untraveled route number of 767. Another one, in the U.S., is one western Kentucky route from leapfrogging me.

[US 89]

48: If former routes that were numbered as such at least one of the times you were on them count, then US-48 (MD)

Rothman will call you a sissy, but I used to do that to count NM 47 and UT 181. A valid play but it felt like enough of an asterisk that I made more effort to find and travel existing examples of those routes than normal.

[Scott5114]

48: If former routes that were numbered as such at least one of the times you were on them count, then US-48 (MD)

Rothman will call you a sissy, but

Rothman will call you a sissy if you eat pancakes with the fork in the wrong hand. It's just the price of admission.

[algorerhythms]

Yeah, I'm not worried about what Rothman thinks.

After retracing my routes from when I completed the counties of Illinois, it does seem I used IL-73 while getting Carroll and Whiteside, so...

73: IL-73
74: I-74
75: I-75
76: Peace, Love, and the Pennsylvania Turnpike
77: I-77
78: I-78
79: I-79
80: I-80
81: I-81
82: US-82 (TX)
83: I-83
84: I-84 (PA)
85: ON-85 (which is a terrible road to drive on and I hate it, for the record. Okay, I don't hate it as much as the 401, but nonetheless)
86: I-86
87: I-87
88: I-88 (IL)
89: ON-89
90: I-90
91: ???

[kphoger]

46:  US 46 (New Jersey) (only if the segment over the George Washington Bridge counts)

It is still unknown if Rothman will call you a sissy for counting this.

Did you eat at the Olive Garden at 47th & 7th?

[Rothman]

46:  US 46 (New Jersey) (only if the segment over the George Washington Bridge counts)

It is still unknown if Rothman will call you a sissy for counting this.

Did you eat at the Olive Garden at 47th & 7th?

US 46 ends on the GWB, so that is non-sissy work.

Olive Garden is for people who lack taste buds and refinement.

Counting routes that no longer exist I could go either way on.

I'll be updating everything when I get back home from this weekend visit to family.

[algorerhythms]

I keep finding routes from when I completed Illinois' counties that are keeping me going here...

91: IL-91
92: PA-92
93: IL-93
94: I-94
95: I-95
96: I-96
97: IL-97
98: NY-98
99: I-99
100: IL-100
101: ON-101
102: ON-102
103: IL-103
104: NY-104
105: IN-105
106: IL-106
107: IL-107
108: MD-108
109: ???

[NWI_Irish96]

I drove on a bit of OH 174 today, so my lowest is now all the way up to . . . 175.

Trip to Milwaukee is in order.

[kphoger]

I still can't believe I don't have 26.

[Rothman]

I keep finding routes from when I completed Illinois' counties that are keeping me going here...

91: IL-91
92: PA-92
93: IL-93
94: I-94
95: I-95
96: I-96
97: IL-97
98: NY-98
99: I-99
100: IL-100
101: ON-101
102: ON-102
103: IL-103
104: NY-104
105: IN-105
106: IL-106
107: IL-107
108: MD-108
109: ???

Make up your mind.

[Rothman]

We'll wait on algorerhythms to finalize his list.  I believe I captured the other updates.

oscar	643
formulanone	577
Rothman	451
74/171FAN	432
Mapmikey	429
HTM Duke	386
jayhawkco	379
Konza	378
Duke87	353
Hot Rod Hootenanny	346
cl94	338
hbelkins	334
corco	333
froggie	248
deathtopumpkins	245
dlsterner	232
paulthemapguy	207
US 89	192
Jim	184
NWI_Irish96	175
plain	174
csw	174
rel4	170
hockeyjohn	154
dfilpus	149
A.J. Bertin	148
Thing 342	127
Scott5114	113
Buck87	112
SGwithADD	112
Bitmapped	111
bassoon1986	109
adwerkema	108
SEWIGuy	108
amroad17	107
Great Lakes Roads	107
tq-07fan	107
SD Mapman	107
sparker	102
TheHighwayMan394	102
DandyDan	102
sbeaver44	102
skluth	102
J N Winkler	102
Flint1979	97
hobsini	97
jlam	97
1995hoo	96
clong	89
SkyPesos	89
7/8	88
Bickendan	88
I-55	86
Caps81943	86
chesapeake256	84
webny99	68
Eth	63
flan	54
BrianP	53
mgk920	48
BlueOutback7	48
milbfan	47
noelbotevera	47
Big John	46
ozarkman417	46
texaskdog	42
TBKS1	39
ketchup99	38
averageroadgeek	37
ipeters61	35
Evan_Th	33
FrCorySticha	33
ran4sh	32
Thunderbyrd316	31
doorknob60	29
Ben114	29
Bruce	29
stevashe	29
CNGL-Leudimin	27
ftballfan	26
kphoger	26
mapman1071	24
therocket	24
KEK Inc.	21
jp the roadgeek	19
sharkyfour	19
kurumi	18
Takumi	18
dvferyance	17
1	14
Roadgeekteen	14
RyanB06	14
CoreySamson	14
cwf1701	13
SoDakInterstateEnthusiast	13
kirbykart	13
apeman33	12
JMoses24	12
ClassicHasClass	11
KEVIN_224	11
wxfree	9
computerfan0	9
jeffandnicole	8
PHLBOS	8
TheGrassGuy	8
WillWeaverRVA	8
Tarkus	7
TheStranger	7
Quillz	7
Pink Jazz	6
DeaconG	6
Skye	5
Roadsguy	5
Super Mateo	4
SoCal Kid	3
thspfc	3
LilianaUwU	3
Occidental Tourist	3
Truvelo	2
bzaharin	2
Zeffy	2
Finrod	2
Kulerage	2
Aaron Camp	2
skquinn	2
MCRoads	2
snowc	2
RoadRebel	2
CoolAngrybirdsrio4	2
Hurricane Rex	1
idk	1

[Bickendan]

Careful scrutiny of my travels in Arkansas and Colorado shows small overlaps with AR and CO 88, putting me at 109.

[Hot Rod Hootenanny]

I drove on a bit of OH 174 today, so my lowest is now all the way up to . . . 175.

Trip to Milwaukee is in order.

How could you pick up 174, but not 175, while on the eastside of Cleveland?!

[74/171FAN]

I drove on a bit of OH 174 today, so my lowest is now all the way up to . . . 175.

Trip to Milwaukee is in order.

How could you pick up 174, but not 175, while on the eastside of Cleveland?!

Great catch.  You could use it even as an excuse to view the rail line in the middle of OH 87.

[NWI_Irish96]

I drove on a bit of OH 174 today, so my lowest is now all the way up to . . . 175.

Trip to Milwaukee is in order.

How could you pick up 174, but not 175, while on the eastside of Cleveland?!

So I had my family with me and there are limits to how much I can add to the fastest route. Plus I knew that I had 175 in Milwaukee which isn't too far away.

[cl94]

I drove NV 338 today, so my lowest is now 348. That will be a hard one to get from my current location and I'm kicking myself for not driving PA 348 when I lived out that way.

[Rothman]

What happened to algorerhythms?

oscar	643
formulanone	577
Rothman	451
74/171FAN	432
Mapmikey	429
HTM Duke	386
jayhawkco	379
Konza	378
Duke87	353
cl94	348
Hot Rod Hootenanny	346
hbelkins	334
corco	333
froggie	248
deathtopumpkins	245
dlsterner	232
paulthemapguy	207
US 89	192
Jim	184
NWI_Irish96	175
plain	174
csw	174
rel4	170
hockeyjohn	154
dfilpus	149
A.J. Bertin	148
Thing 342	127
Scott5114	113
Buck87	112
SGwithADD	112
Bitmapped	111
bassoon1986	109
Bickendan	109
adwerkema	108
SEWIGuy	108
amroad17	107
Great Lakes Roads	107
tq-07fan	107
SD Mapman	107
sparker	102
TheHighwayMan394	102
DandyDan	102
sbeaver44	102
skluth	102
J N Winkler	102
Flint1979	97
hobsini	97
jlam	97
1995hoo	96
clong	89
SkyPesos	89
7/8	88
I-55	86
Caps81943	86
chesapeake256	84
webny99	68
Eth	63
flan	54
BrianP	53
mgk920	48
BlueOutback7	48
milbfan	47
noelbotevera	47
Big John	46
ozarkman417	46
texaskdog	42
TBKS1	39
ketchup99	38
averageroadgeek	37
ipeters61	35
Evan_Th	33
FrCorySticha	33
ran4sh	32
Thunderbyrd316	31
doorknob60	29
Ben114	29
Bruce	29
stevashe	29
CNGL-Leudimin	27
ftballfan	26
kphoger	26
mapman1071	24
therocket	24
KEK Inc.	21
jp the roadgeek	19
sharkyfour	19
kurumi	18
Takumi	18
dvferyance	17
1	14
Roadgeekteen	14
RyanB06	14
CoreySamson	14
cwf1701	13
SoDakInterstateEnthusiast	13
kirbykart	13
apeman33	12
JMoses24	12
ClassicHasClass	11
KEVIN_224	11
wxfree	9
computerfan0	9
jeffandnicole	8
PHLBOS	8
TheGrassGuy	8
WillWeaverRVA	8
Tarkus	7
TheStranger	7
Quillz	7
Pink Jazz	6
DeaconG	6
Skye	5
Roadsguy	5
Super Mateo	4
SoCal Kid	3
thspfc	3
LilianaUwU	3
Occidental Tourist	3
Truvelo	2
bzaharin	2
Zeffy	2
Finrod	2
Kulerage	2
Aaron Camp	2
skquinn	2
MCRoads	2
snowc	2
RoadRebel	2
CoolAngrybirdsrio4	2
Hurricane Rex	1
idk	1