I copied the list in the first post, and then followed the bolding style. Strikethru= no travel. (I have quite a few "first exit past end only, to say I've been on it.") No AK, HI, or PR for me. * = traveled all or part before signed as interstate
2: TX
4: FL
5: CA, OR, WA
8: CA, AZ
10: CA, AZ, NM, TX, LA, MS, AL, FL
11: NV*
12: LA
14: TX*
15: CA, NV, AZ, UT, ID, MT
16: GA
17: AZ
19: AZ
20: TX, LA, MS, AL, GA, SC
22: MS*, AL*
24: IL, KY, TN, GA
25: NM, CO, WY
26: TN, NC, SC
27: TX (still four miles short on this, sigh)
29: MO, IA, SD, ND
30: TX, AR
35: TX, OK, KS, MO, IA, MN (and E/W splits)
37: TX
39: IL, WI
40: CA, AZ, NM, TX, OK, AR, TN, NC
41: WI
43: WI
44: TX, OK, MO
45: TX
49: LA, AR, MO (AR as I-549, MO/AR before Bella Vista bypass)
55: LA, MS, TN, AR, MO, IL
57: MO, IL
59: LA, MS, AL, GA
64: MO, IL, IN, KY, WV, VA
65: AL, TN, KY, IN
66: VA, DC
68: WV, MD
69: TX, MS, KY, IN, MI
70: UT, CO, KS, MO, IL, IN, OH, WV, PA, MD
71: KY, OH
72: MO, IL
73: NC
74: IA, IL, IN, OH, NC
75: FL, GA, TN, KY, OH, MI
76: CO, NE | OH, PA, NJ (note: Added NJ from original list)
77: SC, NC, VA, WV, OH
78: PA, NJ, NY
79: WV, PA
80: CA, NV, UT, WY, NE, IA, IL, IN, OH, PA, NJ
81: TN, VA, WV, MD, PA, NY
82: WA, OR
83: MD, PA
84: OR, ID, UT | PA, NY, CT, MA
85: AL, GA, SC, NC, VA
86: ID | PA, NY
87: NC | NY
88: IL | NY
89: NH, VT
90: WA, ID, MT, WY, SD, MN, WI, IL, IN, OH, PA, NY, MA
91: CT, MA, VT
93: MA, NH, VT
94: MT, ND, MN, WI, IL, IN, MI
95: FL, GA, SC, NC, VA, DC, MD, DE, PA, NJ, NY, CT, RI, MA, NH, ME
96: MI
97: MD
99: PA, NY