What is your favorite piece of interstate in your state?

[Roadgeekteen]

Mine would be I-90 in the Berkshires.

[CoreySamson]

The double decker portion of I-35 in San Antonio is really interesting to me.

But I really like 610 through Bellaire and the Galleria.

[Max Rockatansky]

Regarding states I lived in, I-5 through Grapevine Canyon by far for California.  I really dig the old segments of the Ridge Route that can be found if you know where to look.  For Arizona it was I-17 north of Anthem to Flagstaff, talk about a terrain change!  The highlight in Michigan was always I-75 over the Mackinaw Bridge.  I find the Interstate system in Florida loathsome and really could never establish a favorite when I live there...probably the Skyway Bridge on I-275.  Connecticut didn't really have much special with it's Interstate segments.  I always like the a Chicago Skyway on I-90 when I lived in Illinois due to the lack of traffic. 

Some states I worked in enough to have might as well have lived are New Mexico and Nevada.  I really liked how I-15 looked in downtown Las Vegas but I have a feeling I-11 would change my mind now that it bypasses Boulder City.  North of Las Cruces I-25 in New Mexico has some really nice scenery following the Rio Grande. 

[TheHighwayMan3561]

I-35 from Exit 245 (Carlton County 61) to Exit 259 (MN 61).

[NWI_Irish96]

I guess it would be I-80/94 at MM 0.1 since that's what I can see out my living room window.

[ibthebigd]

How I-65 and I-75 are both mostly 3 lanes they the state of Kentucky

SM-G950U

[MikieTimT]

I-49 between Fayetteville (Exit 60) and Alma (Exit 20).  Almost all mountains and trees, and only 3 billboard assemblies on the whole stretch!

[Konza]

Gotta go with Max here.  I-17 on the climb up into Flagstaff.

In Kansas, it's the section of I-35 that goes through southern Chase County.  The heart of the Flint Hills.

[dlsterner]

Interesting question, which can be answered for many different reasons.  Whether because of scenery, infrastructure (like a really cool interchange or bridge), lack of traffic, drivability, or any other reason.

Living in Maryland, I would have to say:

I-68 (entire length in state) for its scenery.

Honorable mentions:

I-83 (north of Hunt Valley to the PA state line), also for its scenery.
I-83 (inner city) the way it winds, almost roller-coaster like, towards downtown Baltimore.
I-97, just because I feel it is often unfairly maligned   

[nexus73]

I-405 in PDX has the great city center look in the middle with a beautiful bridge (the Fremont) on the north end while the south end winds up at the most complex interchange in Oregon.  If you like urban freeways, this one is a good 'un for as short as it is!

Rick

[Bruce]

I-90 from Seattle to Ellensburg outside of rush hour / holiday weekends / snowstorms.

An urban engineering marvel with great lake and mountain views, then a slow ascent up to Snoqualmie Pass, and finally seeing the landscape give way to rolling prairie. All in a short 100 miles or so.

[GaryV]

I-75 from Gaylord to St. Ignace.

[hbelkins]

In Kentucky? Honestly? None of them.

[SectorZ]

Mine would be I-90 in the Berkshires.

For once I agree with you.

I actually used to have a favorite in Mass, and it's gone. I used to love the elevated Central Artery of I-93 thru Boston.

[Roadgeekteen]

Mine would be I-90 in the Berkshires.

For once I agree with you.

I actually used to have a favorite in Mass, and it's gone. I used to love the elevated Central Artery of I-93 thru Boston.

The tunnels through downtown Boston are still pretty cool, but I never got to see the original Central Artery.

[sprjus4]

For Virginia, one that stands out to me is I-95 northbound heading into Downtown Richmond, crossing the James River, with a great view of Downtown.

Another one would be the I-464 northbound / I-264 eastbound approaches, heading into Downtown Norfolk, crossing the Elizabeth River, with a great view of Downtown and the Shipyard.

The other obvious ones in Hampton Roads would be the I-664 Monitor Merrimac Memorial Bridge Tunnel and the I-64 Hampton Roads Bridge Tunnel.

For Northern Virginia, the I-95 / I-495 / I-395 Springfield Interchange and the I-95 / I-495 Woodrow Wilson Memorial Bridge.

[ozarkman417]

I'm going to go with I-44 between MO-100 and I-270. Throughout the state, I-44 tends to avoid the most rugged parts of the Missouri Ozarks, though by the St. Louis suburbs the highway (literally) cuts right through them. It is six (later eight) lanes and is known as the Henry Shaw Ozark Corridor. Several state parks, including Route 66 and Castlewood parks are along this corridor.

[Beltway]

Virginia
I-664 bridge-tunnel

I-95 section with HOT Lanes
I-495 section with HOT Lanes
I-395 section with HOT Lanes
Springfield Interchange I-95/I-395/I-495/VA-644

I-77 at Fancy Gap
I-77 at Big Walker Mountain Tunnel and Little Walker Mountain

I-64 over North Mountain

[webny99]

In Kentucky? Honestly? None of them.

I've quite enjoyed I-75 in Kentucky both times I've been down that way. What's not to like about a rural six-lane interstate?

[Max Rockatansky]

In Kentucky? Honestly? None of them.

I've quite enjoyed I-75 in Kentucky both times I've been down that way. What's not to like about a rural six-lane interstate?

Pretty much part of I-95 in Florida and Georgia is six lanes yet throughly detestable. 

[SSOWorld]

Milwaukee's interchanges - though not as good as the ones in Texas.

[Flint1979]

I-75 north of mile marker 330.

[Crown Victoria]

Interstate 76-the original PA Turnpike section between Irwin and Carlisle

[J3ebrules]

For NJ, I'd say Interstate 80 west of the Morristown area. Driving through the NJ Skylands is almost like driving through the Poconos. And I love the rock walls on either side - especially in winter, when icicles form off the layers of rock cut.

[webny99]

In Kentucky? Honestly? None of them.

I've quite enjoyed I-75 in Kentucky both times I've been down that way. What's not to like about a rural six-lane interstate?

Pretty much part of I-95 in Florida and Georgia is six lanes yet throughly detestable.

... but I think it would be even more detestable with four lanes. So the six lanes is still a net positive.