Highway families where you've been on the 3-digit route but not the 2-digit one?

[TheHighwayMan3561]

I won't count US routes because of how infinitely easier it is to drive a 3DUS without driving on its parent because of how far apart they can end up. But as far as I can remember I have no examples of this with interstates either.

[cl94]

Because it has been mentioned, should we even consider US 220 for the purposes of this thread? While it's a spur, per se, it never had a connection to US 20 either directly or via another spur (although one was planned in the form of US 120). They're effectively unrelated routes.

[froggie]

If you've done any amount of traveling in the northeast, you've probably encountered or used US 202 several times, while US 2 is in the middle of nowhere up by the Canadian border. One of the few cases where a child is more prominent than its parent.

Only if you consider "more prominent" to equal "more mileage" or "closer to population"...

[US 41]

US 421

[Doctor Whom]

US 202, 206, 222, 522, 158, and 192.
I-278.

[iBallasticwolf2]

Now that a post mentioned US 421 I realized I have travelled that but not US 21.

[Duke87]

If you've done any amount of traveling in the northeast, you've probably encountered or used US 202 several times, while US 2 is in the middle of nowhere up by the Canadian border. One of the few cases where a child is more prominent than its parent.

Or even grown up here. I don't remember the first time I was on any of US 202 but I must have been reasonably young. Would have been in Danbury, one of your examples. But I was in college the first time I ever was on any of US 2.

[US 41]

I drove US 412 in New Mexico as well, but I've never drove on US 12.

[Super Mateo]

For me, US 421 in northern Indiana.  I've never been anywhere near US 21.  Also, I took a small chunk of I-279 to get to a Pirates game one day, but never found my way to I-79.

[Rothman]

Yeah, I was on US 202 long before I was on US 2.  US 202 was practically in my backyard growing up, whereas US 2 is way up north.

I'd imagine this is the case for quite a few people given how drastically US 202 strays from US 2.

[dfilpus]

No Interstates.
US 191, in AZ and WY.

[TEG24601]

US 421, but never US 21.
US 395, but never US 95.

[theline]

US 421

Same for me. That's the only one I can think of. It's almost like cheating because the part of the child I've been on is so far from the parent.

[pianocello]

No interstates for me.

I've been on US 421, 321, and 221 but not 21.

I've also been on US 150, and the only sections of 50 I've been on are the atrociously signed segment in DC. Therefore, I could say that it qualifies if I didn't know any better.

[bassoon1986]

I'm pretty sure I have the I-270 example from St. Louis as well. Never hopped on I-70.

US 183 (only from a short concurrency with US 287 near Vernon, TX), never been on US 83

[clong]

Been on I-278 NY, but never I-78 and I-480 OH and I-580 NV, but never I-80

[TEG24601]

US 421

Same for me. That's the only one I can think of. It's almost like cheating because the part of the child I've been on is so far from the parent.

Yep, Carroll County and White County, Indiana, and downtown Michigan City.

[DandyDan]

1. US 211 on the day my friend and I went from the DC area to Shenandoah National Park, but not US 11.
2. US 421 on my trip to Indy, but not US 21, although I did travel on OH 21 in the Cleveland area.
3. Also in Cleveland, US 322 and US 422, but never US 22.
4. Back when I was a kid, I was on US 191 in Bozeman, MT, then in 2009, I was on its overlap with I-10, but never on US 91.
5. That 2009 trip also had me on US 180, but not on a current section of US 80, although I was on AZ 80 to see Tombstone, plus I assume at some point when I was in El Paso, I had to be on an old alignment of US 80.

[cpzilliacus]

I was on parts of U.S. 19 (where it was multiplexed with I-275) near St. Petersburg, Fla. and Tampa, but not otherwise.

But I have driven long sections of U.S.119 and U.S. 219. in Maryland, Pennsylvania, West Virginia and Kentucky.

[english si]

US180 (Grand Canyon), but not US80.

Nothing on Interstates now, but for a couple of weeks, I had I-405, but not I-5, and for a short period of time (the length of time to traverse from I-5 to I-80) I had I-580, but not I-80.

Anyone who has traveled I-238 clearly can count that!

[jdb1234]

For me:

US 220 but not US 20

US 301 but not US 1

[GaryV]

I've been on US-522 (see the lame clinches thread) but I don't believe I've ever been on US-22.  I may have also been on US-322, but don't remember.

[kurumi]

None for me either. But some of the closest "connections" are pretty far away:
* US 202 in Connecticut, but US 2 in Montana
* US 395 in the Eastern Sierras; US 95 in Idaho
* US 441 in Florida; US 41 in Nashville
* US 169 in Minnesota; US 69 in Oklahoma

[hbelkins]

I was on parts of U.S. 19 (where it was multiplexed with I-275) near St. Petersburg, Fla. and Tampa, but not otherwise.

But I have driven long sections of U.S.119 and U.S. 219. in Maryland, Pennsylvania, West Virginia and Kentucky.

What route did you take to get to and from Pikeville a couple of years ago?

[odditude]

throw my hat in the US 202 / US 206 pile.