Cities Served by Only One or Two 2di's

[Henry]

Trying not to be too exhaustive, but what major cities (population 100,000 or more) are served by just one or two 2di's?

I'll give you two examples:

I-4 is the only 2di (1di?) that goes through Orlando, FL.

I-35 and I-80 meet in Des Moines, IA.

[NWI_Irish96]

So your thread subject said 3di and your post said 2di.

I'm gonna go by what your post said.

South Bend is served by only I-80/90
Fort Wayne is served by only I-69
Evansville is served by only I-69 and (perhaps) I-64
Aurora and Naperville are served by only I-88
Elgin is served only by I-90
Grand Rapids is served by only I-96
Ann Arbor is served by only I-94
Peoria is served only by I-74

[hotdogPi]

Austin: ranked 11th in the country, only one 2di

[US 89]

This list is going to include almost all big western and central cities...

Salt Lake City, I-15 and I-80
Phoenix, I-10 and I-17
Tucson, I-10 and I-19
Las Vegas, I-15 and I-11 (which I guess doesn't reach Vegas city limits yet but serves the metro)
Reno, I-80
Boise, I-84
Los Angeles, I-5 and I-10
Sacramento, I-5 and I-80
San Francisco/Oakland, I-80
Portland, I-5 and I-84
Seattle, I-5 and I-90
Spokane, I-90
Fargo, I-29 and I-94
Sioux Falls, I-29 and I-90
Omaha, I-29 and I-80
Topeka, I-70
Wichita, I-35
Tulsa, I-44
Albuquerque, I-25 and I-40
Las Cruces, I-10 and I-25
El Paso, I-10
Midland, I-10
Odessa, I-10
Amarillo, I-27 and I-40
Lubbock, I-27
Abilene TX, I-20
Waco, I-35
Austin, I-35
Corpus Christi, I-37
McAllen, I-2 and I-69C
...I could go on...

Seems to me it would be better to approach this from the other way - a better topic might be "cities with more than two 2dis".

[JayhawkCO]

Colorado

No 2dis
Boulder
Greeley

One 2di
Aurora - I-70
Centennial - I-25
Colorado Springs - I-25
Fort Collins - I-25
Lakewood - I-70
Pueblo - I-25
Westminster - I-25

Two 2dis
Arvada - I-70 & I-76
Thornton - I-25 & I-76

Three 2dis
Denver - I-25, I-70, & I-76 (just barely on I-76)

Chris

[JayhawkCO]

This list is going to include almost all big western and central cities...

...

Seems to me it would be better to approach this from the other way - a better topic might be "cities with more than two 2dis".

Even New York City only has two: I-87 and I-95.

Chris

[SkyPesos]

Going by metro areas, Columbus is a notable medium-large city in the Midwest with only two 2di (I-70 and I-71), compared to many metros with a similar size with 4 (I-65/69/70/74 in Indianapolis, I-29/35/49/70 in KC, I-44/55/64/70 in St Louis, etc).

[ilpt4u]

This list is going to include almost all big western and central cities...

...

Seems to me it would be better to approach this from the other way - a better topic might be "cities with more than two 2dis".

Even New York City only has two: I-87 and I-95.

Chris

I-78 is signed thru the Holland Tunnel and barely in Manhattan

I-80 is not signed into NY, but it clearly serves NYC

So NYC would have 4: I-78, I-80, I-87, I-95

[JayhawkCO]

This list is going to include almost all big western and central cities...

...

Seems to me it would be better to approach this from the other way - a better topic might be "cities with more than two 2dis".

Even New York City only has two: I-87 and I-95.

Chris

I-78 is signed thru the Holland Tunnel and barely in Manhattan

I-80 is not signed into NY, but it clearly serves NYC

So NYC would have 4: I-78, I-80, I-87, I-95

I did forget about I-78, and while I don't want to get into a Baltimore type discussion, if we're doing "cities" and not "metro areas", I think we have to define what "serve" means.  Otherwise, most of my Colorado cities above get one or two added to them. 

Chris

[TheHighwayMan3561]

MSP: I-94 and I-35

[SkyPesos]

I did forget about I-78, and while I don't want to get into a Baltimore type discussion, if we're doing "cities" and not "metro areas", I think we have to define what "serve" means.  Otherwise, most of my Colorado cities above get one or two added to them. 

Chris

I'll go with this for "served":
1) Enters the census defined metro area
2) Has the city name as a control city for multiple occurrences.

This will allow some interstates through metro areas to be counted, like I-80 for Chicago, Cleveland and NYC, and not allowing some of the less obvious ones, like I-84 for NYC.

[jmacswimmer]

Washington DC: I-66 & I-95

[SkyPesos]

Washington DC: I-66 & I-95

Is DC the only city that lost a 2di towards their count when I-70S became I-270?

[zachary_amaryllis]

norfolk / hampton roads area is only served by I-64 and about a million x64's. though, from what i've read here, might eventually be hit by 87?

[MinecraftNinja]

Buffalo: I-90
Providence and Bridgeport: I-95
Manchester: I-93

[snowc]

Dunn NC has ONLY 1 2di and that is Interstate 95

[SkyPesos]

Dunn NC has ONLY 1 2di and that is Interstate 95

It also have less than 1/10 the minimum population the op wanted.

[hotdogPi]

How about this:

Pick a point in the mainland US. Create a circle and expand it until reaching the third 2di. What point gives you the most populous (US only) circle?

[jmacswimmer]

Washington DC: I-66 & I-95

Is DC the only city that lost a 2di towards their count when I-70S became I-270?

Pittsburgh as well I think, once I-70 was pulled off the Penn-Lincoln Parkway and put on the Washington-New Stanton route that was, up to that point, another I-70S.

Speaking of Pittsburgh: it also qualifies for this thread with I-76 & I-79.

[SkyPesos]

How about this:

Pick a point in the mainland US. Create a circle and expand it until reaching the third 2di. What point gives you the most populous (US only) circle?

Haven't tried it yet, but if you center a point at Sacramento (I-5/I-80), and go with a radius of 350 miles (roughly where it touches either I-10 in LA or I-15 in Barstow), that would include the entire Bay Area and the Central Valley population.

[TheHighwayMan3561]

Washington DC: I-66 & I-95

Is DC the only city that lost a 2di towards their count when I-70S became I-270?

It depends on your interpretation. Wichita may count if you consider I-35W (now 135) to have been different from mainline 35.

[TheStranger]

Washington DC: I-66 & I-95

Is DC the only city that lost a 2di towards their count when I-70S became I-270?

It depends on your interpretation. Wichita may count if you consider I-35W (now 135) to have been different from mainline 35.

In California, San Bernardino used to be served by 2 2dis (I-15 and barely I-10), then 15 became I-15E in the 1970s then turned into a 3di in 1982 as modern I-215. 

Temp I-15E reached Riverside but not sure how well that was ever signed.

Oakland used to have I-5W along I-580 in the early 1960s.

[GaryV]

Michigan's 10 largest cities:
-- Detroit, 2 2di's
-- Grand Rapids, 1
-- Warren, 0
-- Sterling Heights, 0
-- Lansing, 1 (I-69 misses city limits)
-- Ann Arbor, 1
-- Flint, 2 (barely, only because there is an isthmus of the city limits across I-75 to the airport)
-- Dearborn, 1
-- Livonia, 1
-- Troy, 1

Throw in the charter townships that are at least as populous as Troy:
-- Clinton Twp, 1
-- Canton Twp, 0
-- Macomb Twp, 0

[KEK Inc.]

San Jose, CA, (10th largest population) never has had a 2di.  I suppose if US-101 were to turn into I-3 between San Francisco and LA, it could happen, but highly unlikely.

[DTComposer]

For California, I'm going to use urban areas over 100K (based on 2010 figures, since 2020 hasn't been released for urban areas), as I think that strikes the balance between city proper and MSA (skewed by large county size), and demonstrates the 2di has the "intent" of serving the named city, even if it doesn't enter the city limits.

0
San Jose
Fresno
Concord
Bakersfield
Oxnard-Ventura
Modesto
Lancaster-Palmdale
Santa Rosa
Antioch
Visalia
Thousand Oaks
Santa Barbara
Salinas
Santa Cruz
Hemet
Merced
Santa Maria
Simi Valley
Yuba City
Seaside-Monterey

1
San Francisco-Oakland (I-80)
Mission Viejo (South Orange County) (I-5)
Murrieta-Temecula (I-15)
Stockton (I-5)
Indio (Palm Springs) (I-10)
Victorville-Hesperia (I-15)
Santa Clarita (I-5)
Vallejo (I-80)
Fairfield (I-80)
Redding (I-5)
El Centro (I-8)

2
Los Angeles (I-5, I-10)
Riverside-San Bernardino (I-10, I-15)
Sacramento (I-5, I-80)

3
San Diego (I-5, I-8, I-15)

Of the 20 areas not served by any 2di, 12 of them are on the sections of either CA-99 or US-101 that frequently get talked about as future interstate corridors (at least in groups like these!).

Also of those 20, only 2 are served by at least one 3di.