Longest Stretches of Interstates You've Still Not Traveled

[SkyPesos]

Of all the "real" x0 and x5 interstates for me:

I-80: 2124 miles (West of I-294)
I-90: 1905 miles (I-405 to US 12 at Wis Dells)
I-40: 1550 miles (West of I-30)
I-15: 1434 miles (Entire route)
I-10: 1362 miles (West of I-410)
I-5: 1259 miles (South of WA 518)
I-20: 1252 miles (West of Ted Turner/Windsor at Atlanta)
I-95: 1115 miles (South of I-895)
I-70: 1110 miles (West of I-670/US 71)
I-25: 1063 miles (Entire route)
I-35: 592 miles (North of I-670)
I-65: 448 miles (South of I-40)
I-55: 362 miles (South of I-240)
I-75: 342 miles (North of I-94)

Updates
- I-10: 1339 mi. Covered a bit of I-10 in the San Gabriel Valley area of LA.
- I-95: 1077 mi. Got a short section between I-495 split and US 1 in MD
- I-75: 328 mi. Got most of it between I-94 and Mackinaw City, which moves my longest section of I-75 not covered to south of the Florida Turnpike split

[Great Lakes Roads]

Top three:

1. I-5 between Santa Clarita, CA and Eugene, OR (819 miles)
2. I-80 between San Fransico, CA and Lake Point, UT (713 miles)
3. I-94 between Billings, MT and Belfield, ND (293 miles)

[dlsterner]

Distances estimated.

1.  I-80 - 2550 miles, Toledo OH to western terminus.
2.  I-10 - 1920 miles, Slidell LA to western terminus.
3.  I-40 - 1890 miles, Nashville TN to western terminus.
4.  I-70 - 1700 miles, Dayton OH to western terminus.

Among N/S interstates, I-5 - 1400 miles, entire length.

As you can tell, the bulk of my cumulative mileage is east of the Mississippi.

[Rothman]

Forgot that I split up my I-49 segment earlier this year on a trip around KS/MO/CO/etc as well as on a former trip down I-44 which got the concurrency in MO.  Remaining segments are too short to report (under 100 miles).

I-10, east side of downtown rectangle in Phoenix to I-25: 388 miles
I-25, I-90 to CO 7: 370 miles
I-25, US 50 to I-40, 334 miles
I-90, US 93 to WA 17, 288 miles
I-10, TX 17 to TX 41, 278 miles
I-5, OR 99 to Grimes Arbuckle Road: 271 miles
I-49, I-435 to I-40, 268 miles
I-15, I-90 to Canadian Border, 267 miles
I-8, Exit 89, Ocotillo to I-10, 265 miles
I-44, OK 4 to US 287, 111 miles
I-5: I-405, northern interchange to CA-76, 104 miles

[interstatefan990]

A significant one of mine is I-75 from Atlanta to the Canadian border, as I do most of my north-south travels on I-95.