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Wiki Largest gaps between Superchargers on US Interstates

ItsNotAboutTheMoney

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Jul 12, 2012
11,630
9,720
Maine
  • | This is a WikiPost. Members with appropriate permissions may edit.
On the Socorro, NM thread @PLUS EV asked if I had a list of gaps 140 miles or greater.

Of course I do!

I posted there, but I figured I'd create a separate thread for it.

Note that:
- I've included some gaps that are future Interstate-ish routes like I-69. Those Interstate routes may never be built, but since they're identified it makes sense they have traffic and need Superchargers, right?
- I don't tolerate much diversion, so for example I-35 from Ardmore to Perry, OK is listed because Oklahoma City, OK is over 10 miles diversion and I-55 is listed because of the relic of Tesla's location desperation, Memphis, TN.
- I ignore urban Superchargers.
- Only a few of gaps listed have even identified splitter locations. Haubstadt, IN and Nevada, MO are under construction. Socorro, NM is identified.
- Watertown, SD to Fargo, ND is listed, and Watertown, SD fairly recently split a larger gap on I-29 from Sioux Falls, SD to Fargo, ND.
-Meridian, MS to Birmingham, AL is on an I-20/I-59 concurrency so listed twice

SeqHwyFromStateToStateGapSplitterStateToFrom
1I-69BrinkleyARKuttawaKY280.1
2I-44Start (US-277/281/287 Wichita Falls)TXCatoosaOK255
3*I-26AshevilleNCNorth CharlestonSC253.8Asheville - Thetford StNC5.7248.5
3I-49TexarkanaTXLowellAR250.3
4*I-26Asheville - Thetford StNCNorth CharlestonSC248.5OrangeburgSC180.469
4I-55GrenadaMSMinerMO239.4
6*I-69KuttawaKYBloomingtonIN212HaubstadtIN108.9103.5
7*I-64Mount VernonILLouisvilleKY195.1HaubstadtIN81.4112.6
7I-40Oklahoma CityOKVan BurenAR194.3
8I-69WLaredo at MexicoTXVictoriaTX184
9I-40OzarkARBrinkleyAR181.6
10I-26Asheville - Thetford StNCOrangeburgSC180.4
11I-35LaredoTXSchertzTX173.1
12I-69RichmondTXNacogdochesTX170
13I-74West CincinnatiOHHuntingtonWV158.7
14I-35ArdmoreOKPerryOK155
15I-25Truth or ConsequencesNMAlbuquerqueNM150.2SocorroNM72.879.1
16I-69CStart(PharrTX)End (George WestTX)149AliceTX10941.4
17*I-49JoplinMOEnd (I-435 near Kansas CityMO)148.3NevadaMO67.482.2
18I-40KingmanAZFlagstaffAZ147
19I-69NacogdochesTXTexarkanaAR145.9
20*I-59MeridianMSBirminghamAL144.8CottondaleAL49.249.2
20*I-20MeridianMSBirminghamAL144.8CottondaleAL96.649.2
21I-40GallupNMAlbuquerqueNM144
23I-29WatertownSDFargoND143.1
24I-40Start(BarstowCA)NeedlesCA141
25*I-5Grants PassORSpringfieldOR138.4Myrtle CreekOR46.992.4

Aside: this is from a worksheet I have that goes down to 100 miles. That list has a total of 122 unsplit gaps. 9 gaps from my original list have been split (including some splits still greater than 100 miles), 8 are under construction and 3 have an identified ("permit") location.

Updated: Asheville - Thetford St, NC is a pathetic splitter, so closes an entry but adds another one.

Updated: Striking through the open ones. Also added the important Myrtle Creek splitter which was just below the 140 in the original table.

Updated (3): Orangeburg, SC splits Asheville - Thetford St, NC and North Charleston. It's only a partial splitter, and was a large gap, resulting in Asheville - Thetford St, NC to Orangeburg, SC (180.4 miles) being added to the list.

Updated: Tuscaloosa, AL open under construction and called Cottondale, to reflect the postal town.

Updated: Alice, TX splits (Future) I-69C from the start at Pharr, TX to the end at George West, TX
 
Last edited:

TomServo

Active Member
Apr 10, 2014
2,012
1,403
Belleville IL
I have driven Mt Vernon to Louisville and return on two trips and the plug to plug mileage the car reports is 199.3 miles. Here’s trip info from Louisville to Mt Vernon from my trip in July.
TjBGyyG.jpg

I wouldn't want to do this in the winter.
 
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ItsNotAboutTheMoney

Well-Known Member
Jul 12, 2012
11,630
9,720
Maine
I have driven Mt Vernon to Louisville and return on two trips and the plug to plug mileage the car reports is 199.3 miles. Here’s trip info from Louisville to Mt Vernon from my trip in July.
TjBGyyG.jpg

I wouldn't want to do this in the winter.
I should have added a couple more notes: the distances are in the standard Interstate directions: even west to east and odd south to north.
Also, it's according to Supercharge.info which uses Mapbox, using OSM.
 

ItsNotAboutTheMoney

Well-Known Member
Jul 12, 2012
11,630
9,720
Maine
>=100120140150160180200Extra
I-6996433221
I-1083000000
I-4085522200
I-2072100000
I-9064000000
I-2553110000
I-6452111101
I-8051000000

The Extra refers to an extra count in my list for at minimum the >= 100 column, but usually more. This is where an unopened splitter of a large gap still leaves gaps over 100 and I've added entries for the new gaps.
Right now it's just the effect of Haubstadt, IN under construction.
 

PLUS EV

Running on Empty
Sep 16, 2016
7,251
12,257
Seattle
On the Socorro, NM thread @PLUS EV asked if I had a list of gaps 140 miles or greater.

Of course I do!

I posted there, but I figured I'd create a separate thread for it.

Note that:
- I've included some gaps that are future Interstate-ish routes like I-69. Those Interstate routes may never be built, but since they're identified it makes sense they have traffic and need Superchargers, right?
- I don't tolerate much diversion, so for example I-35 from Ardmore to Perry, OK is listed because Oklahoma City, OK is over 10 miles diversion and I-55 is listed because of the relic of Tesla's location desperation, Memphis, TN.
- I ignore urban Superchargers.
- Only a few of gaps listed have even identified splitter locations. Haubstadt, IN and Nevada, MO are under construction. Socorro, NM is identified.
- Watertown, SD to Fargo, ND is listed, and Watertown, SD fairly recently split a larger gap on I-29 from Sioux Falls, SD to Fargo, ND.
-Meridian, MS to Birmingham, AL is on an I-20/I-59 concurrency so listed twice

SeqHwyFromStateToStateGapSplitterStateToFrom
1I-69BrinkleyARKuttawaKY280.1
2I-44Start (US-277/281/287 Wichita Falls)TXCatoosaOK255
3I-26AshevilleNCNorth CharlestonSC253.8
4I-49TexarkanaTXLowellAR250.3
5I-55GrenadaMSMinerMO239.4
6I-69KuttawaKYBloomingtonIN212HaubstadtIN108.9103.5
7I-64Mount VernonILLouisvilleKY195.1HaubstadtIN81.4112.6
8I-40Oklahoma CityOKVan BurenAR194.3
9I-69WLaredo at MexicoTXVictoriaTX184
10I-40OzarkARBrinkleyAR181.6
11I-35LaredoTXSchertzTX173.1
12I-69RichmondTXNacogdochesTX170
13I-74West CincinnatiOHHuntingtonWV158.7
14I-35ArdmoreOKPerryOK155
15I-25Truth or ConsequencesNMAlbuquerqueNM150.2SocorroNM72.879.1
16I-69CPharrTXGeorge WestTX149
17I-49JoplinMOEnd (I-435 near Kansas CityMO)148.3NevadaMO67.482.2
18I-40KingmanAZFlagstaffAZ147
19I-69NacogdochesTXTexarkanaAR145.9
20I-59MeridianMSBirminghamAL144.8
20I-20MeridianMSBirminghamAL144.8
21I-40GallupNMAlbuquerqueNM144
23I-29WatertownSDFargoND143.1
24I-40Start(BarstowCA)NeedlesCA141

Aside: this is from a worksheet I have that goes down to 100 miles. That list has a total of 122 unsplit gaps. 9 gaps from my original list have been split (including some splits still greater than 100 miles), 8 are under construction and 3 have an identified ("permit") location.
My methodology would be quite a bit more "loose" than yours. I wouldn't count all these "future interstates" and I wouldn't worry so much about the diversions. They are inconvenient, but when you are worrying about ending up on the side of the road vs. diverting 15-20 minutes to an inconveniently located supercharger, the choice is obvious.

So my list would be something like:

1) OKC-Van Buren 194mi
2) Laredo-San Antonio 164mi
3) Sheridan-Evansville* 154mi
4) ABQ-Truth or Consequences 150mi
5) Watertown-Fargo 147mi
6) Kingman-Flagstaff 147mi
7) Gallup-ABQ 145mi
8) Meridian-Birmingham 145mi

Honorable mention goes to Shelby-Fort MacLeod at 215 miles, although obviously a lot of that is in another country.

Sheridan-Evansville is two different interstates, but it's obviously going to be a common route for people in that area.

I didn't bother including Mount Vernon-Louisville because Haubstadt is about to open. I also didn't include Barstow-Needles (which is actually 147 miles) because Yermo is an easy bailout in the uphill direction (which is the only direction that matters) and it cuts the gap to <140 miles.

#2 and #8 are not much of a concern since the climate is favorable and there's no significant elevation change.

#1, #5, and #6 are probably the biggest issues to address.

#1 is really the only one that could be tough to make under certain conditions assuming one is aware of the large gap and actually trying to charge to near full and extend range to the extent possible.
 

ItsNotAboutTheMoney

Well-Known Member
Jul 12, 2012
11,630
9,720
Maine
My methodology would be quite a bit more "loose" than yours. I wouldn't count all these "future interstates" and I wouldn't worry so much about the diversions. They are inconvenient, but when you are worrying about ending up on the side of the road vs. diverting 15-20 minutes to an inconveniently located supercharger, the choice is obvious.

So my list would be something like:

1) OKC-Van Buren 194mi
2) Laredo-San Antonio 164mi
3) Sheridan-Evansville* 154mi
4) ABQ-Truth or Consequences 150mi
5) Watertown-Fargo 147mi
6) Kingman-Flagstaff 147mi
7) Gallup-ABQ 145mi
8) Meridian-Birmingham 145mi

Honorable mention goes to Shelby-Fort MacLeod at 215 miles, although obviously a lot of that is in another country.

Sheridan-Evansville is two different interstates, but it's obviously going to be a common route for people in that area.

I didn't bother including Mount Vernon-Louisville because Haubstadt is about to open. I also didn't include Barstow-Needles (which is actually 147 miles) because Yermo is an easy bailout in the uphill direction (which is the only direction that matters) and it cuts the gap to <140 miles.

#2 and #8 are not much of a concern since the climate is favorable and there's no significant elevation change.

#1, #5, and #6 are probably the biggest issues to address.

#1 is really the only one that could be tough to make under certain conditions assuming one is aware of the large gap and actually trying to charge to near full and extend range to the extent possible.

While you and other EV drivers might tolerate some large diversions, I'm looking at it more from a sense of completion.

I don't have elevations, so obviously some are a bigger issue than others. But even in favorable conditions the practical problem with some of these larger gaps, especially where 2 larger gaps are connected, is that the stops, can become mandatory, and it becomes a stress point. Really for removing stress you want more some splitting of consecutive 100-mile gaps. Consecutive 100+ gaps is something else to look at.,

.On the Sheridan-Evansville issue, I have gaps for travel between different Interstates on a separate list that I need to update. Not surprising to note that I-26 has some of the larger numbers. :p
 
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My methodology would be quite a bit more "loose" than yours. I wouldn't count all these "future interstates" and I wouldn't worry so much about the diversions. They are inconvenient, but when you are worrying about ending up on the side of the road vs. diverting 15-20 minutes to an inconveniently located supercharger, the choice is obvious.

So my list would be something like:

1) OKC-Van Buren 194mi
2) Laredo-San Antonio 164mi
3) Sheridan-Evansville* 154mi
4) ABQ-Truth or Consequences 150mi
5) Watertown-Fargo 147mi
6) Kingman-Flagstaff 147mi
7) Gallup-ABQ 145mi
8) Meridian-Birmingham 145mi

Honorable mention goes to Shelby-Fort MacLeod at 215 miles, although obviously a lot of that is in another country.

Sheridan-Evansville is two different interstates, but it's obviously going to be a common route for people in that area.

I didn't bother including Mount Vernon-Louisville because Haubstadt is about to open. I also didn't include Barstow-Needles (which is actually 147 miles) because Yermo is an easy bailout in the uphill direction (which is the only direction that matters) and it cuts the gap to <140 miles.

#2 and #8 are not much of a concern since the climate is favorable and there's no significant elevation change.

#1, #5, and #6 are probably the biggest issues to address.

#1 is really the only one that could be tough to make under certain conditions assuming one is aware of the large gap and actually trying to charge to near full and extend range to the extent possible.

Don't forget Billings to Miles City, MT. That's 152 miles between superchargers. Technically I-90 to I-94, but that's semantic if you're driving it. :)

Custer, MT, which would split that gap, is now listed as "target Q2 2022" - we'll hope!
 

Rocky_H

Well-Known Member
Feb 19, 2015
7,830
9,851
Boise, ID
I'm curious:
1. Is there a reason why this is limited to only Interstates? Maybe that's just because this is very manually calculated, so easier to work with the smaller number of routes.

2. Would it be possible to include the U.S. federal highways, which are still major routes in a lot of places where there are no Interstates?

I ask this because Monday and Tuesday, I drove back from Los Angeles to Boise. That path northward, through California, Nevada, and Oregon is almost all U.S. highways, (395 and 95) where there are no Interstates--about 750 miles of it. Most of that had Supercharger coverage, but the Winnemucca to Boise section still doesn't, which is over 250 miles.
 
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I'm curious:
1. Is there a reason why this is limited to only Interstates? Maybe that's just because this is very manually calculated, so easier to work with the smaller number of routes.

2. Would it be possible to include the U.S. federal highways, which are still major routes in a lot of places where there are no Interstates?

I ask this because Monday and Tuesday, I drove back from Los Angeles to Boise. That path northward, through California, Nevada, and Oregon is almost all U.S. highways, (395 and 95) where there are no Interstates--about 750 miles of it. Most of that had Supercharger coverage, but the Winnemucca to Boise section still doesn't, which is over 250 miles.

I think the list of gaps on US highways would be long. But what the heck, I'll start:

US-2, Spokane, WA to Grand Forks, ND: 1,150 miles.

Can anyone beat that one? :)
 

ItsNotAboutTheMoney

Well-Known Member
Jul 12, 2012
11,630
9,720
Maine
I think the list of gaps on US highways would be long. But what the heck, I'll start:

US-2, Spokane, WA to Grand Forks, ND: 1,150 miles.

Can anyone beat that one? :)

Hmm ...

I got 1159.3 miles following US-2 for that.
If Shelby, MT actually gets built it'll split the gaps to 417.5 miles and 741.9 miles.
US-60 Wickenburg, AZ to Miner, MO is 1583.5 miles. Plenty of places in between, but not actually close to that highway. Even once Socorro, NM is open, Socorro, NM to Miner, MO will be 1152.8 miles.
 

ItsNotAboutTheMoney

Well-Known Member
Jul 12, 2012
11,630
9,720
Maine
I'm curious:
1. Is there a reason why this is limited to only Interstates? Maybe that's just because this is very manually calculated, so easier to work with the smaller number of routes.

2. Would it be possible to include the U.S. federal highways, which are still major routes in a lot of places where there are no Interstates?

I ask this because Monday and Tuesday, I drove back from Los Angeles to Boise. That path northward, through California, Nevada, and Oregon is almost all U.S. highways, (395 and 95) where there are no Interstates--about 750 miles of it. Most of that had Supercharger coverage, but the Winnemucca to Boise section still doesn't, which is over 250 miles.
I have a separate list of spacing along US Numbered Highways and some of those gaps are very long if you're following the highway and don't want significant diversion.

The thing is that in contrast to Interstates, an individual US Numbered Highways is often not the fastest route, so a _faster_ diversion can get you to a Supercharger by an Interstate or other highway.

A useful list of gaps on US Numbered Highways would likely need to be more selective.

Still, my sense of completion means I am tracking along US highways, and it's clear that Tesla is filling in holes along many of those in as well. It's nerd-exciting to me when the largest gap drops below 250 miles, then 200, then 150 and then, sometimes, 100.

And yes, I have a lot of manual processes, and yes I should work more on automating it, but I'm a procrastinator.
 

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