I decided to make a whole new list for this after the rest of my trips in 2021. Some repeat from before, many are new, and some were eliminated.
Interstates:
I-25 (US 85) (yeah, this is a technicality more than anything else)
I-35 (I-44/OK 66)
I-49 (I-44/US 71)
I-465 (IN) (I-74 and friends)
I-271 (OH) (US 422)
I-294 (IL) (I-80)
Interstate Business Loops/Spurs:
I-75 BL (Findlay, OH) (US 224)
US Routes:
US 3 (I-95/MA 128)
US 7 (I-84, US 6, US 202)
US 11E (US 19/US 421)
US 23 (GA 13, US 119, US 460, KY 80, KY 1426, OH 199, OH 18, OH 12)
US 25W (I-75, I-640, I-40)
US 31E (US 60)
US 31W (US 60, US 150)
US 35 (US 50, US 24)
US 36 (I-465 and friends)
US 44 (NY 55, US 9W, I-84, US 6)
US 45 (US 52)
US 51 (I-74, I-55)
US 54 (I-110)
US 59 (I-30)
US 61 (I-40, I-55, US 64, US 79, I-64, US 40, I-280, US 6, I-80)
US 65 (I-30, US 67, US 70, US 167)
US 71 (I-44/I-49)
US 76 (US 17, US 74, NC 133, US 421)
US 79 (I-40, I-55, US 61, US 64)
US 82 (US 380, US 62, US 385, US 277, US 281, US 287, TX 79)
US 83 (US 380)
US 84 (US 380, I-20)
US 85 (I-10/US 180, I-25)
US 90 (I-95, US 1) (still not sure it counts because it is on C/D roads)
US 92 (FL 687)
US 127 (US 42, KY 338, US 25, KY 371, KY 1072, US 27, US 52, US 22, OH 3)
US 150 (US 24, IL 29, IL 116, I-64, IN 62, US 31W, US 60)
US 167 (I-30, US 65, US 67, US 70, I-40)
US 180 (AZ 64, I-40 BL (Flagstaff, AZ), I-40, US 60, US 191, I-10, US 70, US 85)
US 191 (I-10, US 60/US 180)
US 264 (I-87, US 64, I-795)
US 270 (I-30)
US 277 (US 82, I-44, US 281, US 287, US 62)
US 278 (I-20)
US 287 (US 82, TX 79, US 281, I-44, US 277)
US 377 (I-30)
US 385 (US 62, US 82, US 380)
US 412 (I-44, OK 66, I-40)
US 441 (US 301)
US 601 (I-85)
US 701 (US 501)
US Auxiliary Routes:
US 1 ALT (Wake Forest, NC) (NC 98 BUS (Wake Forest))
US 1 BUS (Henderson, NC) (US 158)
US 19 ALT (St. Petersburg, FL) (FL 595)
US 33 BUS (Elkton, VA) (US 340)
US 58 BUS (Hillsville, VA) (US 221)
US 64 ALT (Tarboro, NC) (US 64, US 258, NC 111, NC 222)
US 220 ALT (Milesburg, PA) (PA 504, PA 144, PA 150)
US 460 BUS (Bedford, VA) (US 221 BUS (Bedford, VA), US 221, VA 122)
State Routes:
AZ 260 (US 60/AZ 77)
AZ 287 (AZ 79 BUS (Florence)
CT 72 (I-84)
DE 5 ALT (Milton) (DE 30)
DE 6 (DE 15, US 13)
DE 20 (US 13, US 113, DE 26)
DE 23 (DE 1D, US 9, DE 404)
DE 24 (DE 30, DE 1D)
DE 42 (DE 15)
DE 300 (DE 15)
FL 84 (Fort Lauderdale) (I-595)
FL 228 (US 301, I-10, US 17, I-95)
FL 686 (FL 694)
GA 5 (I-75)
GA 13 (US 23)
IL 3 (I-55, I-64, US 40)
IL 8 (US 24/IL 29/IL 116)
IN 1 (IN 8)
IN 3 (Kendallville) (IN 8)
IN 18 (US 52/IN 55)
IN 25 (Logansport) (US 24/US 35)
IN 37 (I-465, I-74, and friends)
IN 55 (US 52, IN 18)
IN 62 (I-64, US 150, I-265, IN 265)
IN 67 (I-465, I-74, and friends)
IN 101 (Woodburn) (US 224)
IN 105 (US 224)
IN 331 (US 20)
KY 36 (US 42)
KY 338 (US 42/US 127)
KY 1072 (US 25/US 42/US 127)
KY 1230 (KY 1934)
KY 1426 (US 23/US 119/US 460/KY 80)
MA 128 (I-95)
MD 12 (US 113 BUS (Snow Hill))
MD 290 (MD 313)
MD 662 (US 50)
MO 43 (I-44)
MO 94 (MO 364)
MO 174 (MO 39 BUS (Mt Vernon))
NC 4 (NC 48)
NC 8 (US 52)
NC 11 (US 258)
NC 24 (I-40)
NC 33 (US 301)
NC 35 (US 258)
NC 37 (US 158 BUS (Gatesville))
NC 39 (NC 98, US 401, NC 56)
NC 43 (US 64, NC 48)
NC 43 BUS (Rocky Mount) (NC 48)
NC 57 (US 501, US 158, NC 49)
NC 86 (US 70 BUS (Hillsborough), NC 49)
NC 87 (US 17, NC 49/NC 54, NC 100)
NC 111 (US 64, US 64 ALT (Tarboro), US 258, NC 122)
NC 122 (US 64, US 64 ALT (Tarboro), US 258, NC 111)
NC 125 (US 258, NC 903, NC 125, US 301, NC 561)
NC 132 (US 117)
NC 133 (US 17, US 74, US 76, US 421)
NC 231 (US 64 ALT (Spring Hope))
NC 343 (US 17 BUS (South Mills))
NC 403 (US 117 CONN (Calypso))
NC 561 (US 301, NC 125, NC 903, US 258)
NC 903 (US 258, NC 125, US 301, NC 561, US 158)
NJ 34 (NJ 33)
NJ 47 (US 40, US 322)
NJ 50 (US 40)
NY 9N (US 9)
NY 17B (NY 55)
NY 19 (NY 417)
NY 23B (NY 9G, US 9)
NY 26 (US 20, NY 12B, NY 49, NY 69, NY 46)
NY 29 (US 9, NY 50, NY 40)
NY 35 (US 6, US 202)
NY 36 (NY 417)
NY 41 (NY 206, NY 12)
NY 50 (US 9, NY 29)
NY 52 (NY 55, I-84)
NY 67 (US 9, NY 40)
NY 142 (NY 40)
NY 149 (US 9, NY 40)
NY 213 (US 209)
NY 220 (NY 12) (still posted along and east of NY 12)
NY 305 (NY 417)
OH 11 (I-80)
OH 12 (US 224, US 23, OH 18, OH 199)
OH 14 (US 422, OH 8, OH 14, OH 43, OH 87, OH 10)
OH 21 (I-77)
OH 32 (US 50, US 33, OH 7, OH 618, US 50 BUS (Belpre, OH))
OH 37 (US 22, OH 188)
OH 41 (US 50, US 22, US 62, OH 3)
OH 43 (OH 8, US 422, OH 10, OH 14, OH 87)
OH 49 (US 224, OH 2, OH 18)
OH 56 (US 22)
OH 57 (OH 18)
OH 59 (OH 8)
OH 60 (US 22, US 40, OH 93, OH 146, OH 18)
OH 65 (OH 18)
OH 67 (OH 18)
OH 73 (US 50, OH 124)
OH 93 (US 22, US 40, OH 60, OH 146)
OH 101 (OH 18)
OH 104 (US 23 BUS (Chillicothe), US 150)
OH 109 (OH 18)
OH 113 (US 20, OH 18)
OH 114 (US 224)
OH 115 (US 224)
OH 124 (US 50, OH 73)
OH 126 (US 22/OH 3)
OH 132 (US 50)
OH 146 (US 22, US 40, OH 93, OH 60)
OH 151 (US 22)
OH 158 (US 22/OH 188)
OH 175 (OH 87)
OH 183 (US 224)
OH 188 (US 22, OH 158, OH 37)
OH 189 (US 224)
OH 199 (US 23, OH 18, OH 12)
OH 209 (US 22/US 40)
OH 225 (US 224)
OH 235 (OH 18)
OH 327 (US 50)
OH 561 (US 22/OH 3)
OH 613 (OH 18)
OH 668 (US 22)
OH 753 (US 50)
OH 800 (US 22)
OK 3 (I-44)
OK 66 (I-44, I-35, US 412)
PA 8 (PA 228)
PA 38 (PA 208)
PA 88 (PA 136, PA 837)
PA 108 (PA 18, PA 168)
PA 152 (US 202 BUS (Montgomeryville))
PA 167 (PA 29, PA 706)
PA 171 (PA 92)
PA 173 (PA 58)
PA 196 (PA 191)
PA 208 (PA 38)
PA 210 (PA 85, PA 954)
PA 212 (PA 412)
PA 231 (US 40)
PA 239 (US 11)
PA 255 (PA 120)
PA 258 (PA 58)
PA 287 (PA 973)
PA 307 (US 11)
PA 358 (PA 18/PA 58)
PA 381 (PA 31)
PA 405 (PA 54)
PA 445 (PA 192)
PA 551 (US 224)
PA 588 (PA 18)
PA 642 (PA 54)
PA 663 (PA 73)
PA 706 (PA 29, PA 167)
PA 711 (PA 31)
PA 729 (PA 969)
PA 770 (US 219)
PA 819 (US 119)
PA 837 (PA 88, PA 136)
PA 954 (PA 286, PA 85/PA 210)
PA 981 (PA 31, PA 286)
SC 171 (SC 700)
TX 70 (I-20, US 84, US 380)
TX 108 (I-20)
TX 158 (TX Loop 250, I-20, TX 349)
TX 208 (I-20, US 380)
TX 349 (I-20, TX 158)
VA 32 (US 13, US 13 BUS (Suffolk), VA 10, US 460 BUS (Suffolk), US 258, US 17)
VA 42 (South) (US 52)
VA 43 (VA 24, US 221 BUS (Bedford), US 11)
VA 67 (US 460)
VA 96 (VA 49)
VA 122 (US 460, US 221, US 460 BUS (Bedford))
VA 122 BUS (Bedford) (US 460 BUS (Bedford), US 221 BUS (Bedford), VA 43)
VA 200 (VA 3)
VA 237 (US 50, US 29)
VA 360 (US 501)
WV 2 (I-77, US 22)
WV 20 (US 19)
WV 29 (US 50)
WV 31 (US 50)
WV 32 (US 48)
WV 42 (US 50)
WV 61 (US 19/WV 16)
WV 72 (US 48, US 219, US 50)
WV 92 (US 33, US 48, US 250, US 50)
WV 97 (WV 16)