What Interstates have you traveled?

[Duke87]

In entirety, for 2dis: 16, 19, 41, 45, 66, 68, 76(E), 77, 78, 79, 81, 83, 84(E), 86(W), 86(E), 87, 88(E), 89, 91, 93, 95, 97, 99

I-44 mocks me, I am missing only two miles of it near Tulsa. Pretty close with I-64 as well, I'm only missing the westernmost 31 miles.

In terms of 3dis... too many to list. I have clinched all interstate mileage in ME, NH, VT, MA, RI, CT, NY, NJ, PA, DE, MD, DC, and WV, so everything in those states, but that's far from all I've done.

[bulldog1979]

I've clinched I-39, I-41, I-43, I-96 and I-97. For 3dIs, I've clinched all of them in Michigan; I-794 and I-894 in Wisconsin; I-190, I-290, I-255, I-270, I-294, and I-355 in Illinois; I-469 in Indiana; I-280 and I-475 in Ohio; and I-395 in Maryland.

I've been on parts of, state sections clinched marked with asterisks: I-5 (CA), I-10 (CA), I-35 (MN), I-44 (MO), I-55 (MO—IL), I-57 (IL), I-64 (MO—IL), I-69 (IN—MI), I-70 (MO, IL, PA, MD*), I-72 (IL), I-74 (IL), I-75 (OH—MI*), I-76 (OH—PA), I-80 (CA, IL, IN*, OH), I-83 (MD), I-88 (IL), I-90 (MN, WI, IL*, IN*, OH), I-94 (MN, WI, IL*, IN*, MI), I-95 (MD), I-280 (CA), I-380 (CA), I-480 (OH), I-494 (MN), I-535 (MN*—WI), I-580 (CA), I-695 (MD), and I-895 (MD)

[Interstate Trav]

Lets see here

I-5 From Palm Ave in San Diego to Castaic CA
I-8 From San Diego to SR 67
I-10 From CA 1 (All of California) and to Prince Road in Tucson AZ
I-15 From I-5 (So CA 15 Technically I guess) to I-8 and from I-8 to Salt Lake City.  Bartendar Road (Can't remember the exit name exactly, but it's a loop.)  (So all of CA-NV-AZ)

I-210 All of it
I-215 From Scott Road to I-15 in Devore (So almost all of it)
I-105 All of it
I-405 All of it
I-605 All of it
I-710 All of it
I-805 From A few exits before the Mexico Border to I-5

Off of the top of my head

[paulthemapguy]

Clinched:  I-88(IL), I-39, I-41, I-57, I-76(CO).
Mostly clinched:  I-72, 74, 43, 88E,
80 from Rock Springs, WY to I-287 in NJ
90 from Bozeman, MT to Utica, NY
Random 3di's: IL-294, 290, 355, 190, 180, 474, 280; IN-469, 465, 865; NY-690; VT-189; OH-271; WI-794, 894; SD-190; WY-180; WA-405; CA-205, 880; NE-480; IA-235; ME-395

Other interstates I've encountered can be discerned from my national collection album https://www.flickr.com/photos/138603251@N02/albums/72157664636004361

[LM117]

Clinched:

I-795 NC
I-440 NC
I-495 NC
I-540 NC
I-295 VA
I-581 VA
I-280 OH
I-275 MI

Partially clinched:

I-95 from Fredericksburg VA to Florence SC

I-20 from Florence SC to Atlanta GA

I-85 from US-460 junction to I-95 in Petersburg VA and from Greensboro NC to I-85/US-70 split in Durham NC

I-40 from Wilmington NC to Knoxville TN

I-77 from Statesville NC to I-80/Ohio Turnpike just south of Cleveland

I-80 from I-77 near Cleveland OH to I-280 in Toledo OH

I-90 from Elyria OH to I-280 in Toledo OH

I-75 from I-275 junction near Monroe MI to I-640 in Knoxville TN

I-94 from Wayne Road exit near Romulus MI to Huron Street exit in Ypsilanti MI

I-81 from I-64 junction in Staunton VA to I-581 in Roanoke VA

I-64 from I-264/I-664 junction in the Hampton Roads area of VA to Charleston WV and (separately) the I-64/I-75 concurreny in Lexington KY

I-70 from Hancock MD to I-70/I-76 split in New Stanton PA

I-76 from Breezewood PA () to I-80 near Youngstown OH and the I-76/I-77 concurrency in Akron OH

I-96 from I-275 junction in Plymouth MI to US-23 in Brighton

I-264 from I-64 interchange near Norfolk/Virginia Beach line to Independence Blvd exit in Virginia Beach

I-640 from I-75 junction on northside of Knoxville TN to I-40 east of Knoxville

[roadman]

Fully clinched:

I-84 (eastern section), I-76, I-78, I-88, I-91, I-93, I-99, I-195 (RI-MA), I-295 (RI-MA), I-476 (PA), I-495 (MA)

Mostly clinched:

I-81 (missing US/Canada border to Binghamton NY and I-81/I-26 junction to I-81/I-40 junction)
I-87 (missing US/Canada border to Pottersville NY)
I-90 (missing Seattle WA to Missoula MT and Livingston MT to Ranchester WY)

Large sections traveled

I-80 (I-80/I-95 junction to I-80/I-57 junction)
I-95 (Augusta, ME to Fayetteville NC)

[ztonyg]

2dis clinched: I-8, I-17

2dis almost clinched:
I-10 (except for Jacksonville - Slidell, and Houston - San Antonio)
I-16 (except for west of GA 358)
I-44 (except for south of I-40)
I-45 (except for Galveston - north interchange with I-610)
I-71 (except for north of I-480 and between I-270 and I-70 in Columbus)

[kkt]

2dis only, clinched:

I-82
I-84 western

Major portions traveled:

I-5 from San Diego to the Canadian border
I-40 west of Oklahoma City
I-64 west of the I-264 junction in Norfolk
I-70 west of St. Louis
I-80 west of Davenport
I-85 from Atlanta to Richmond
I-95 from Rocky Mount to Philadelphia

I-90 west of Spokane

[bzakharin]

No 2-digits for me. As a driver I've only clinched I-195 (NJ), I-280 (NJ), and I-276. As a passenger I can add I-476. I-287 would be my almost with a gap between exits 14A and 14B in New York.

[NWI_Irish96]

100% on 2di
I-19
I-41
I-43
I-65
I-66
I-88(IL)

>90% on 2di
I-30
I-70
I-76(NE/CO)
I-78
I-94
I-96

100% on 3di > 10mi
I-205(CA)
I-225
I-264(KY)
I-265(KY)
I-270(MD)
I-290(IL)
I-294
I-395(DC/VA)
I-465
I-470(OH/WV)
I-475(GA)
I-495(DC/MD/VA)
I-496

[golden eagle]

As far as entire two-digit interstates, only two: 12 and 57. The next one I'm closest to clinching is I-55. I'm missing the segment from Joliet northward. I also need to get I-65 in all of Indiana to clinch. As far as the 3DIs...

110 (FL)
110 (LA)
110 (MS)
220 (MS)
240
285
310
440
459
805
985

[ET21]

3DIs: I-180 (IL), I-190 (IL), I-190 (SD), I-270 (CO), I-290, I-294, I-355
2DIs: I-88 (IL), I-39

[TheHighwayMan3561]

Full clinches:

35, 76 (W), 84 (E), 88 (E), 96, 97

~80% clinched:

94 (Hardin, MT to Ypsilanti, MI)

Over half:

90 (Rapid City-Boston/Buffalo, WY-Hardin, MT)

About 40%:

25 (I-76 to northern terminus)

[KEVIN_224]

The only one I've clinched in its entirety is I-84, from Sturbridge, MA to Dunmore, PA near Scranton. It wasn't in one pass, since I live within 3 miles of it in Connecticut. The longest single passes were from Sturbridge, MA through CT to Exit 20 in Southeast, NY and from it's western terminus in PA to Exit 35 by the Plainville/New Britain, CT city line.

I've done all of I-91 in CT and MA. In VT, I've only got up to Exit 11 in the White River Junction section of Hartford, VT.

I've been on I-95 (combining several trips) from the Bangor, ME area down to Exit 6 of the New Jersey Turnpike in Mansfield, NJ, then from near Trenton, NJ (at the US 1 Exit in Lawrenceville, NJ) to Exit 52 in Baltimore for the Baltimore/Washington Parkway.

[AnchorGuy319]

Just keeping it to 2DIs.

Traveled and clinched where noted:
I-4    Traveled from FL408 (Orlando, FL) to I-95 (Daytona Beach, FL)
I-5   Traveled from Magic Mountain Parkway (Santa Clarita, CA) to U.S.-Mexico Border (San Ysidro, CA)
I-8   Traveled from Western Terminus (Ocean Beach by San Diego, CA) to AZ85 (Gila Bend, AZ)
I-10   Traveled from Western Terminus (Santa Monica, CA) to CA111 (Palm Springs, CA) & from U.S. 49 (Gulfport, MS) to I-5 (Lake City, FL)
I-12   Traveled from Western Terminus (Baton Rouge, LA) to LA3002 (Denham    Springs, LA)
I-15   Traveled from I-80 (Salt Lake City, UT) to I-5 (San Diego, CA)
I-16   
I-17   <Clinched>
I-19   
I-20   Traveled from I-35W (Fort Worth, TX) to U.S, 69 (Tyler, TX) & from I-59    (Meridian, MS) to I-75 (Atlanta, GA)
I-22   <Clinched>
I-24   <Clinched>
I-25   Traveled from I-80 (Cheyenne, WY) to U.S. 50 (Pueblo, CO)
I-26   
I-27   
I-29   <Clinched>
I-30   Traveled from Western Terminus (Fort Worth, TX) to U.S. 71 (Texarkana, AR)
I-35   Traveled from I-30 (Dallas, TX) to Northern Terminus (Duluth, MN)
I-37   
I-39   <Clinched>
I-40   Traveled from U.S. 95 (Kingman, AZ) to U.S. 54 (Tucumcari, NM) & from U.S. 65 (Conway, AR) to I-30 (Little Rock, AR)
I-41   
I-43   
I-44   Traveled from U.S. 69 South (Vinita, OK) to U.S. 59 (Miami, OK)
I-45   
I-49   Traveled from Northern Terminus (Kansas City, MO) to MO90 (Jane, MO) & from AR151 (Texarkana, AR) to U.S. 71 (Alexandria, LA)
I-55   Traveled from Northern Terminus (Chicago, IL) to U.S. 61 (Memphis, TN)
I-57   Traveled from I-64 (Mount Vernon, IL) to I-24 (near Goreville, IL)
I-59   Traveled from Northern Terminus (Meridian, MS) to U.S. 98 (Hattiesburg, MS)
I-64   Traveled from Western Terminus (Wentzville, MO) to I-65 (Louisville, KY)
I-65   Traveled from I-24 (Nashville, TN) to Southern Terminus (Mobile, AL)
I-66   Traveled from VA28 (Centreville, VA) to Eastern Terminus (Washington, DC)
I-68   
I-69   Traveled from I-94 (Marshall, MI) to U.S. 127 (DeWitt, MI)
I-70   <Clinched>
I-71    Traveled from I-76 (Seville, OH) to I-270 North (Columbus, OH)
I-73   
I-74   Traveled from I-80 (Davenport, IA) to I-280 (Moline, IL)
I-75   Traveled from U.S. 10 (Midland, MI) to I-375 (Detroit, MI) & from I-24 (Chattanooga, TN) to FL408 (Orlando, FL)
I-76   Traveled from Western Terminus (Seville, OH) to I-70 (Breezewood, PA)
I-77   Traveled from U.S. 250 North (Strasburg, OH) to U.S. 250 South (New Philadelphia, OH)
I-79   
I-80   From Western Terminus (San Francisco, CA) to IN15 (Bristol, IN)
I-81   
I-82      
I-83   <Clinched>
I-84   
I-85   From GA74 (Fairburn, GA) to Pleasant Hill Road (Duluth, GA)
I-86   From I-390 (Avoca, NY) to U.S. 15 (Corning, NY)
I-87   
I-88   
I-89   
I-90   Traveled from I-29 (Sioux Falls, SD) to IN15 (Bristol, IN)
I-91   
I-93
I-94   Traveled from I-294 (Lansing, IL) to I-69 (Marshall, MI)
I-95   Traveled from U.S. 1 (Middletown Township, PA to VA30 (Doswell, VA)
I-96   Traveled from U.S. 127 (East Lansing, MI) to Eastern Terminus (Detroit, MI)
I-99   

[jp the roadgeek]

I- H1: I-H201 western junction to HI 63 (passenger)
I-4: I-75 to FL 528, FLTP to I-95 (passenger; little hazy on where the western point of the eastern piece is as I was 6 years old)
I-10: New Orleans Airport to I-610 (LA), Esplanade Ave in New Orleans to I-110 near Biloxi (all driving)
I-110 (MS), I-610(LA): All (driving)
I-65: E Washington St to I-70 West in Indianapolis (passenger)
I-70: Indy airport to E Washington St (passenger); I-81 to Park & Ride inside the Baltimore Beltway (driving)
I-76: US 222 to Roosevelt Blvd, South St to I-295 (all driving)
I-176: All
I-276: I-76 to US 1 (driving)
I-476: I-95 to PA 663 (driving)
I-676: Independence Mall to US 30 in Camden (driving)
I-78: US 22 in Allentown to I-287 (driving)
I-278: I-95 to GCP, LIE to US 1 (drove I-87 to GCP, and LIE to end)
I-678: HRP to Cross Island Parkway (driving)
I-80: PA 33 to I-287, NJ 17 to NJTP (all driving)
I-81: US 30 to VA/WV state line (all driving)
I-83: President St to US 30; PA 581 to US 322 (all driving)
I-84 (East): Matamoras, PA to Sturbridge (driving)
I-384: All (driving)
I-684: Merge of RR 984 from HRP to NY 22 (never did the official I-684 to I-287 connection)
(Future) I-86: NY 211 to I-87
I-87: I-278 to I-84, NY 28 to Canada (driving: I-278 to CCP, I-287 (Westchester) to I-84, NY 28 to Northway Exit 20)
I-287: I-78 to I-95 (Rye).  All driving.
I-787: I-90 to NY 7 (driving)
I-88: NY 28 to I-90 (driving)
I-89: I-93 to VT 2A (driving: NH 11 duplex piece, US 4 duplex piece from NH to VT)
I-90: US 219 to I-93 (driving: I-88 to I-93)
I-190 (MA) I-290 to Exit 4 (driving)
I-190 (NY): I-290 to US 62 (passenger)
I-290 (MA): All (driving)
I-290 (NY) All (passenger)
I-91: All (driving: I-95 to MA 2 East)
I-291 (CT) All (driving)
I-291 (MA) All (driving)
I-391 All (driving)
I-691 All (driving)
I-93: MA 3 to NH 104 (driving: I-90 to State St, I-495 to NH 104)
I-293: All (driving)
I-95: I-4 to US 58, US 1 exit on the DC  in MD to I-90, I-495 (MA/NH line) to US 201.  (driving: US 1 Beltway exit to PA Turnpike interchange [have done future I-295 piece to Trenton], north to I-495 in MA; Exit 13 on 128 portion to I-90; I-495 to Kittery; I-195 to I-295 in ME)

I-195 (ME) I-95 to US 1 (driving)
I-195 (NJ): All (driving: I-295 to CR 537 Six Flags exit)
I-195 (MD): All (driving: I-95 to MD 166)
I-295 (ME): I-95 to Maine Mall exit (driving)
I-295 (MA/RI): All (driving)
I-295 (NY): I-695 to CIP (driving)
I-295 (NJ/DE) All, including future piece (driving)
I-395 (CT/MA): All (driving)
I-395 (MD): All (driving)
I-395 (DC/VA) VA 110 to New York Ave (driving)
I-495 (MA): All (driving: MA 140 to northern junction with I-95)
I-595 (MD): US 301 to I-97 (driving)
I-695 (NY): All (driving)
I-695 (MD): All (driving)
I-695 (DC): All (driving)
I-795 (MD): All (driving)
I-895 (MD): All (driving)
I-97: All (driving)

[Rothman]

Yeah, I'm going to go vdeane's route on this one.  Too long to list out like people are doing on here:

My map

And, crap, I just remembered I need to update it to include some minor mileages (I-99 in NY and more of I-86 in NY).

[hotdogPi]

Given that people are posting segments of every Interstate and not just the ones they traveled a lot of, here is what I have, copied directly from my Pages¹ file, listing Interstate routes only and removing the light blue text I use for Interstates:

75: Concurrency with 85
81: NY 17 west to I-88
84: Exit 57 (CT) to east end
85: Exits 72 to 108 ²
87: 90 to Berkshire Connector, south end to Exit 3
88: All (NY)
89: I-93 to Exit 6 ³
90: I-88 to I-87 (NY), Exit B1 (NY) to east end
91: Exits 3 (MA) to 8 (MA), exits 13 (MA) to 14 (MA), exit 29 (CT) to south end
93: Exit 34A (NH) to Exit 7 (MA)
95: Exits 19 (MA) to 5 (NH), 6 (NY) to 47 (CT), gap in NJ to exit 16E (NJ), Exit 27 (PA) to Exit 22 (PA)
278: I-87 to east end
285: Exits 31 to 39
290: All ⁴
291 (MA): All
293: South end to exit 1
393: 3 to 93 (less than 100 feet) ⁵
395 (DC): Exit 9 (DC) to Exit 10 (VA)
495 (MA): Exit 22 to north end
676: 6th St. (PA) to east end of bridge (NJ)


1. Pages is the Mac equivalent of Microsoft Word.
2. Georgia
3. Exit 6 in NH, not VT
4. Massachusetts; I got on/off at the Mass Pike, so I have absolutely none of I-395
5. I'm not even sure if this is part of I-393 or not.

[Charles2]

Clinched routes are bolded:

4, 10, 12, 16, 20, 22, 24, 25, 26, 29, 30, 35, 37, 40, 44, 45, 55, 57, 59, 64, 65, 66, 69, 70, 71, 74, 75, 76E, 76W, 77, 78, 79, 80, 81, 83, 85, 87, 88E, 88W, 90, 91, 94, 95

Junctioned but never traveled:
39, 49, 72, 84E

3-di's:
110 (FL), 110 (MS), 610 (LA), 610 (TX), 220 (MS), 124 (TN), 126 (SC), 526 (SC), 430 (AR), 630 (AR), 135 (KS), 335 (KS), 435 (MO), 140 (TN), 240 (TN), 440 (TN), 640 (TN), 840 (TN), 244 (OK), 155 (MO-TN), 359 (AL), 459 (AL), 759 (AL), 264 (KY), 165 (AL), 265 (KY), former 265 (TN), 465 (IN), 565 (AL), 270 (OH), 470 (WV), 670 (OH), 471 (KY-OH), 275 (FL), 275 (KY-OH, but not in IN), 275 (TN), 475 (GA), 575 (GA), 675 (GA), 278 (NY), former 279 (PA), 280 (IA-IL),, 680 (NE-IA), 381 (VA), 581 (VA), 185 (GA), 185 (SC), 285 (GA), 985 (GA), 190 (NY), 190 (SD), 295 (FL), 295 (DE-NJ), 495 (NY).

[TheStranger]

2dis I've traveled on:

I-H1 from Honolulu International Airport east to Exit 23
Only portions of I-5 I know I have not been traveled on in some form are south of downtown San Diego and the stretch between I-205 and I-580 in the Central Valley
I-8 between the western terminus and El Centro, excepting maybe the segment from Route 125 to Route 67
I-10 from western terminus to Indio
I-15 from southern terminus (whether future one at I-5 or current one at I-8) to Temecula; then from I-10 north to Las Vegas Motor Speedway, and then an isolated segment between U-201 and the northern I-215 junction in the Salt Lake area
I-24 from downtown Nashville southeast to the old Starwood Amphitheatre
I-25 between I-270 north of downtown Denver and I-80 in Wyoming
I-35 between SH 71 and US 183 in Austin
I-40 from US 93 in Kingman, Arizona to Williams, Arizona
I-64 from US 150 west of New Albany, Indiana to KY 151 near Bridgeport, Kentucky
I-65 from the southern I-70 junction in Indianapolis to Wedgewood Avenue/Exit 81 in Nashville
I-69 from State Road 37 in Bloomington, Indiana to State Road 45
I-70 from I-65 in Indianapolis west to State Road 39 in Monrovia; also the portion concurrent with I-71 in Columbus
I think I-71 might be the only 2-digit Interstate I've clinched (as a passenger) from one end to the other, thanks to a 2006 roadtrip from Louisville to Cleveland for the Champcar race in the latter city.
I-75 where concurrent with I-71 (between Newport, Kentucky and Cincinnati)
I-77 from Cleveland south to SR 21 near Pigeon Creek
I-78 from Bloomsbury, New Jersey east to Manhattan
I-80 between San Francisco and Cheyenne, WY (including the portion of US 101 along the Central Freeway that was once I-80 in the early 1960s)
(future) I-86 (eastern) between I-390 and I-87
I-87 near the western I-287 junction
I-88 (eastern) between Colliersville, New York and Schenectady
I-90 from I-71 to Burke Lakefront Airport in Ohio, then from I-290 near Buffalo to Herkimer, New York, then from Schenectady east to I-93 in Boston
I-93 between I-95/Route 128 in Norwood and US 1 (north junction) in Boston
I-95 from Silver Spring, Maryland to Wilmington, Delaware, then from I-676 in Philadelphia to the Betsy Ross Bridge, then from Exit 6 on the New Jersey Turnpike north to Route 128/I-93 in Norwood (excluding former I-95 segment along US 1 in Boston)

3di I have driven on:

California
I-105 (clinched), I-205 (clinched), hidden I-305 (clinched), I-405 (clinched), I-505 (may have clinched as a passenger years ago), I-605 (from I-405 north to Route 60), I-805 (Route 52 north to I-5)
I-110 (clinched), I-210 (I-5 east to Route 2; then Route 134 east to Route 39), I-710 (Route 47 to I-10)
I-280 (clinched), I-380 (clinched), I-580 (clinched), I-680 (clinched), I-780 (clinched), I-880 (clinched), I-980 (clinched), I-238 (clinched), (unsigned former I-480 along US 101/Doyle Drive)

Nevada
I-515 (cllinched), I-580 (I-80 south to NV 431)

Colorado
I-270 (for about 1 mile or so east of I-25)

Kentucky
I-264 (clinched)
I-265 (clinched current portion, excluding under construction East End Bridge)
I-275 (segment from I-71/75 east back towards I-71 northeast of Cincy)

Tennessee
(former I-265)

Ohio
I-270 (west side of beltway)

Pennsylvania
I-676 (one mile west of I-95)

Maryland
I-495 (near Silver Spring)

Delaware
I-295 (entire portion in Delaware)

New Jersey
(former I-495 for one mile east of the Turnpike)
I-287 (short portion from Route 17 north to I-87 in New York)

New York:
I-278 (New Jersey west terminus to the Brooklyn Bridge ramps)
unsigned I-478 (clinched)
I-190 (from Robert Moses State Parkway to I-290)
I-290 (clinched)
I-390 (from I-86 to the Thruway)

[Ian]

Here's my list. A lot of these are recent travels since I went on a cross country trip to California and back this past month.

I-5: Between CA 54 (exit 9) in San Diego to Dana Point (exit 79), between I-710 and the East LA Interchange, and once more on the tiny portion between I-205 and CA 120 near Tracy.
I-8: From the west end in San Diego to CA 67 in El Cajon.
I-10: Between CA 62 (exit 117) and CA 60 (exit 93) and again between the west end and I-405.
I-15: Between I-8 in San Diego to I-215 near Temecula, between exit exit 286 in CA and I-515 in Las Vegas, and again between Provo (US 6) and Salt Lake City (north end of I-80 duplex) in Utah.
I-16: From I-95 to its east end in Savannah.
I-25: In NM between I-40 in Albuquerque and US 550 in Bernalillo, and in CO through Denver between US 36 and downtown as well as north of exit 235 (C-52) up into Wyoming at I-80.
I-35: Only through Oklahoma City between I-44 in the northeast, and where it splits from I-40 in downtown.
I-40: Between Oklahoma City and Albuquerque, and again between Flagstaff and Kingman in Arizona.
I-44: All of it between St. Louis and Oklahoma City.
I-49: The portion where it's duplexed with I-44 near Joplin, MO.
I-55: The portion where it's duplexed with I-70, I-64, and I-44 in East St. Louis and St. Louis.
I-57: The portion where it's duplexed with I-70 in Effingham, IL.
I-64: The portion where it's duplexed with I-55 and I-44 in St. Louis and where it's duplexed with I-95 in Richmond.
I-65: Between the north end of the I-70 duplex and the south junction with I-465 near Indianapolis.
I-66: All of it east of VA 28.
I-70: All of it east of St. Louis save for between Hagerstown and I-695 in Maryland as well as between exit 157 (US 6/191) in Utah and Denver.
I-71: The short portion where it's duplexed with I-70 in Columbus.
I-74: All of the portion where it's duplexed with I-465 in Indianapolis.
I-76 (eastern): All of it east of Youngstown.
I-76 (western): Between its west end at I-70 and I-25 in Denver.
I-77: Between New Philadelphia, OH and I-70.
I-78: Clinched
I-79: The portion duplexed with I-70 through Washington, PA and between I-68 and exit 155 in Morgantown, WV.
I-80: Between I-580/US 395 in Reno and I-15 in Salt Lake City, between I-25 in Cheyenne and I-88 near the Quad Cities, between I-294 near Chicago and I-76 in Youngstown, and between Bloomsburg and I-476 in PA.
I-81: Between Scranton at the north end of I-476 and the Canadian border in the Thousand Islands.
I-83: All of it north of I-76/PA Turnpike.
I-84 (eastern): Clinched
I-87: Clinched
I-88 (eastern): Only the short portion between US 20 in Duanesburg and I-90/NY Thruway.
I-88 (western): Clinched
I-89: Between the south end at I-93 near Concord, NH and US 4 in White River Junction, VT.
I-90: Between I-94 east of Gary to where it splits off the Ohio Turnpike near Cleveland, between NY 400 near Buffalo to I-690 near Syracuse, and all of it east of I-88 near Schenectady.
I-91: All of it between its south end at I-95 in New Haven and Brattleboro, VT.
I-93: All of it except north of Lincoln, NH (for NH 112, exit 32)
I-94: Only the portion that's duplexed with I-80 south of Chicago.
I-95: Clinched
I-97: Clinched

As for 3-digit's, here's a more simpler list with what's clinched in bold...

I-105 (CA), I-110 (CA), I-176, I-180 (WY), I-190 (NY), I-195 (ME), I-195 (RI/MA), I-195 (NJ), I-195 (MD), I-205 (CA), I-210 (CA), I-215 (NV), I-215 (CA), I-244, I-276, I-278, I-280 (CA), I-280 (NJ), I-287, I-290 (NY), I-290 (MA), I-291 (MA), I-293, I-294, I-295 (ME), I-295 (MA/RI), I-295 (NY), I-295 (NJ/DE), I-295 (MD/DC), I-295 (FL), I-376, I-390, I-391, I-393, I-395 (ME), I-395 (MD), I-395 (VA/DC), I-405 (CA), I-444, I-465, I-476, I-478, I-495 (MA), I-495 (NY), I-495 (DE), I-495 (MD/VA/DC), I-515, I-580 (CA), I-580 (NV), I-587, I-595 (MD), I-605, I-676, I-678, I-680 (CA), I-684, I-690, I-691, I-695 (MD), I-695 (DC), I-710, I-787, I-795 (MD), I-805, I-878, I-880, I-890, I-895 (MD)

[Jbte]

Me as Mexican (living in Mexico), I have traveled some interstates mainly in west coast in some of my vacations, all by driving my 2009 SUV from Durango, Mexico plates:

I-35: Between Laredo, TX and north of Dallas, TX
I-10: Between Santa Monica, CA and I-75 in Florida
I-25: Between Las Cruces, NM and Buffalo, WY
I-70: Between Denver, CO and Salina, UT
I-15: Between (near) San Bernardino, CA to Shelby, MT (different periods in certain segments)
I-5: Between Anaheim and US101 in LA area.
I-17: Between Flagstaff and Phoenix in Arizona.
I-40: From I-15 junction to Albuquerque, NM
I-80: small segment in San Francisco (bay bridge) to Oakland, CA, and Salt Lake City, UT to Cheyenne WY.
I-90: between Missoula and Billings in Montana
I-20: in Dallas-Fort Worth area
I-30: in Dallas-Fort Worth area
I-45: Dallas to Galveston in Texas
I-75: from junction I-10 to Kissimmee, FL
I-95: between New York and Boston (using a shuttle not my car  )
I-37: Between San Antonio and Corpus Christi
I-8: small segment from I-10 to AZ 85 (bypass Phoenix)
I-12: New Orleans bypass
I-2 between McAllen and Brownsville

Others in urban areas:
I-210 from Pasadena to I-10 junction in Redlands, CA
I-110 and I-710 in LA area (using Vincent Thomas bridge)
I-410 in San Antonio
I-610 in Houston
I-635 in Dallas
I-280 in San Francisco, CA
I-880 between San Jose and Oakland
I-580 between Oakland and Tracy, CA
I-205 between I-580 and I-5 in CA

And many more state routes and US routes almost all west coast.

[jwolfer]

I am only including 2DIs clinches and significant travels

CLINCHES: 4,12,97,78,59

SIGNIFICANT: 95(from Cross Bronx Expressway to southern terminus in Miami, yes all the incarnations in NJ), 10(from Houston to Jacksonville),66(except for inside Beltway), 81(south of Harrisburg), 75(Dayton Ohio south to FL SR 80 and south of 595),26 (from i40 to i95), I have parts of many more

[cwf1701]

I-20, 22, 24, 40, 44, 55, 64, 65, 70, 71, 74, 75, 76, 80, 90

[AZDude]

40, 20, 17, 25, 8, 12, 70.

515, 215 (NV), 210 (CA), 680 (NE & IA), 640 (TN), 840 (TN), 240 (OK)