3 consecutive interstate route numbers with middle one far away from the others

[roadman65]

I-24, I-25, and I-26.  The first and last are close together in the SE while I-25 is in the west.
One could also say I-81, I-82, and I-83  with the first and last being more than a thousand miles away from the middle.

I-25, I-26, and I-27 has I-26 and I-27 only at 935 miles along I-40 from Nashville to Amarillo.

I-93, I-94, and I-95.  We both know that I-93 and I-95 are in the Northeast with I-94 serving the central part of the nation. 

I-95, I-96, and I-97 as also the first and last are together in Maryland while the middle one is way up in Michigan.

I do not think any others could be this way in the interstate highway system.

[bassoon1986]

10, 11, and 12. LA to NV

15, 16, 17 NM/AZ to GA




iPhone

[kurumi]

H-1, I-2, H-3 (more than 3,600 miles)

[freebrickproductions]

Going by a technicality due to an eventuality:
I-40, I-41, and I-42. I-41 is located in Wisconsin while both I-40 and I-42 will be in the southeast.

[plain]

I-85, I-86, I-87 smdh 

[Scott5114]

Interstate numbering rules mean that this will occur with most sets of three consecutive numbers, since the middle one will always be EW when the other two are NS and vice versa.

[jp the roadgeek]

82-83-84 assuming you use the western 84.
81-82-83.  82 is almost 3000 miles  from Harrisburg

[Henry]

84-85-86 (NY/ID to VA)
87-88 (west)-89

[cwf1701]

68, 69 and 70. 68 and 70 serves Maryland and W. Va, while 69 serves Michigan, Indiana, and Kentucky.

[Scott5114]

Except 69 is going to intersect 70 in Indianapolis. The two are only a few miles apart as it is.

[hotdogPi]

293 and 295 are close, although in different states, while 294 is much farther away. Same with 393 and 395. (93 and 95 were already mentioned.)

[paulthemapguy]

94, 95, and 96.

Since it's common for numbers that have a difference of 2 to be close to each other, finding trios to satisfy this criterion ought to be easier than finding trios that ARE all close to each other, imo

[GreenLanternCorps]

A trio with none near each other: 14 Texas, 15 California to Montana, and 16 Georgia.

[hbelkins]

94, 95, and 96.

Since it's common for numbers that have a difference of 2 to be close to each other, finding trios to satisfy this criterion ought to be easier than finding trios that ARE all close to each other, imo

Ohio has 74-75-76, and 75-76-77, although Cincinnati and Akron aren't exactly neighbors.

[SSR_317]

Except 69 is going to intersect 70 in Indianapolis. The two are only a few miles apart as it is.

Technically, they're 6.917 miles apart at present, per INDOT's latest route log. They won't officially intersect until Section 6 of I-69's SIU #3 is completed and INDOT signs I-69 SIU #2 along I-465. BTW, back when the Interstate System was new, I-69 was originally supposed to meet I-70, but to the east of Indy. This was later shifted to what is now known as the "North Split" of I-65 & I-70 near downtown Indy, where remnants of the ghost ramps for I-69 can still be seen (for a couple more years until INDOT rebuilds that whole area). But the Freeway Revolt killed Indy's Northeast Freeway, and "Classic" I-69 was stuck with it's Exit 0 (now Exit 200) at I-465 & Binford Blvd (old SR 37) in Castleton.