If we are counting one state's portion of a multi-state route as a clinch, then this is my list, with * indicating that the entire route is clinched across all states.
*I-19: AZ
I-25: CO
I-30: AR
I-39: WI
I-40: CA, AZ, NM, TX
*I-43: WI
I-44: MO
I-64: IL, IN, KY, WV
*I-65: IN, KY, TN, AL
*I-66: VA, DC
I-69: IN
I-70: CO, KS, MO, IL, IN, OH, WV, PA
I-71: KY
I-74: IN, OH
I-75: OH, KY
I-78: PA, NJ
I-80: NE, IA, IL, IN, OH, PA, NJ
*I-88(E): IL
I-90: WY, SD, MN, WI, IL, IN
I-94: MT, ND, MN, WI, IL, IN
*I-205 (CA)
*I-110 (MS)
*I-164 (IN), *I-264 (KY)
*I-265 (IN), *I-265 (KY)
I-275 (IN), *I-375 (MI)
*I-465 (IN), *I-865 (IN)
*I-270 (MD)
*I-280 (IL/MO)
*I-190 (IL), *I-290 (IL)
*I-294 (IL), *I-194 (MI), *I-794 (WI), *I-894 (WI)
*I-695 (DC), *I-295 (MD/DC), *I-495 (MD/DC/VA), *I-395 (DC/VA)
*I-196 (MI), *I-296 (MI), *I-496 (MI)
US 6: IN
US 12: IL, IN, MI
US 14: IL
US 30: IN
US 31: IN (had MI but lost it when the new Constantine bypass opened until I make it back there)
US 33: IN
US 41: IL
US 131: IN
US 421: IN
Indiana State Highways:
2, 4(C), 4(W), 5, 8(W), 10, 11(N), 11(S), 13, 17, 19, 22(W), 23, 25(N), 29, 39(S), 43(N), 43(S), 49, 51, 53, 63(N), 70(E), 75(N)
104, 106, 109(N), 110(E), 110(W), 111, 114(C), 115, 117, 119(N), 119(S), 120, 121(S), 130, 134, 135, 143, 144(E), 144(W), 145, 149, 152, 156, 160, 166
203, 211, 212, 213, 225, 237(N), 237(S), 250(W), 256, 265, 267(N), 312, 329, 331, 332, 335(N), 335(S), 337(S), 356(E), 362, 462, 520, 545(S), 750, 827
912(E), 912 (W), 930, 931(N), 931(S), 933
Illinois State Highways:
21, 43, 394
Michigan State Highways:
14, 22, 37, 51, 78, 96, 100, 109, 113, 201, 204, 217, 239, 294
Kentucky State Highways:
146, 660, 841, 864, 907, 913, 913C, 1065, 1116, 1142, 1230, 1447, 1631, 1703, 1727, 1747, 1793, 1817, 1819, 1849, 1861, 1865, 1932, 1934, 2049, 2050, 2051, 2052, 2053, 2054, 2055, 2056, 2672, 2845, 3084, 3222,