USA Toll Transponder Interoperability - 2025 edition

[ElishaGOtis]

As you probably know, TxDOT recently sunsetted the TxTag brand of transponders and transferred operations of the associated TxTag accounts to HCTRA.

Does this move now affect the ability of SunPass Pro to work at facilities in Texas (such as in the Austin area) that were previously TxTag (and not NTTA Tolltag, nor HCTRA E-ZTag) only? 

HCTRA has not yet made arrangements for interoperability between Houston area E-ZTag facilities and Florida SunPass. 

Speaking of which... SunPass is now accepted in HCTRA tolling system

"Texas and Florida toll road customers will be able to travel seamlessly in the two states beginning March 2, 2025.

HCTRA is proud to partner with four major tolling agencies in Florida so that EZ TAGS can be used there, and SunPass transponders will work here.

The tolling agencies are the Florida Turnpike Enterprise (FTE), LeeWay (LCF), Greater Miami Expressway Agency (GMX), and the Tampa Hillsborough Expressway Authority (THEA).

HCTRA has had similar partnerships in place for years making travel easier between Texas, Oklahoma, and Kansas."

And... ExpressToll is also accepted on the HCTRA tolling system

"Texas drivers will be able to use their EZ TAGs in Colorado beginning March 30, 2025.

HCTRA is partnering with E-470, the 47-mile all-electronic tollway on the eastern perimeter of Denver's metropolitan area. It runs through three counties and six municipalities, along with being a major route to Denver International Airport.

EZ TAG drivers will be able to use their transponders on the E-470, while Express Toll users will have access to all HCTRA's toll roads.

Similar HCTRA partnerships already allow seamless travel on toll roads in Texas, Oklahoma, Kansas, and Florida."

It didn't work when I used it on March 16-17... it claimed I had an unpaid toll.

[ran4sh]

Here's the kicker: SunPass mini supposedly doesn't work in the traditional E-ZPass states (SunPass PRO does. The map can be found on the SunPass Wikipedia page or Sunpass.com). However, since this is the 4th toll plaza in a row that it's worked in either WV or IN/KY (I-65), I'd say that needs revisited. There are people on Reddit who've mentioned getting their SunPass mini billed in NJ and ME, so maybe Florida doesn't know the full extent of their interoperability???

Illinois is now only issuing sticker transponders, so it probably works just fine most everywhere now.

One interesting question.. E-ZPass discrimination was legal with "because you can have many and swap them" court decision.
Stickers cannot be removed and reapplied....

But reapplying a sticker transponder is not how they're intended to be used. The intent is that you obtain a new one. They should be free (if an agency charges for a sticker transponder then that is shitty)

[I-55]

Here's the kicker: SunPass mini supposedly doesn't work in the traditional E-ZPass states (SunPass PRO does. The map can be found on the SunPass Wikipedia page or Sunpass.com). However, since this is the 4th toll plaza in a row that it's worked in either WV or IN/KY (I-65), I'd say that needs revisited. There are people on Reddit who've mentioned getting their SunPass mini billed in NJ and ME, so maybe Florida doesn't know the full extent of their interoperability???

Illinois is now only issuing sticker transponders, so it probably works just fine most everywhere now.

One interesting question.. E-ZPass discrimination was legal with "because you can have many and swap them" court decision.
Stickers cannot be removed and reapplied....

But reapplying a sticker transponder is not how they're intended to be used. The intent is that you obtain a new one. They should be free (if an agency charges for a sticker transponder then that is shitty)

I-Pass stickers are indeed free, and I've been able to order 4 stickers despite only having been tolled on one of them (no monthly fees on any of them either makes it stress free to order one for every vehicle). It was just a little annoying having to peel it off when my old vehicle finally croaked.

[Molandfreak]

Here's the kicker: SunPass mini supposedly doesn't work in the traditional E-ZPass states (SunPass PRO does. The map can be found on the SunPass Wikipedia page or Sunpass.com). However, since this is the 4th toll plaza in a row that it's worked in either WV or IN/KY (I-65), I'd say that needs revisited. There are people on Reddit who've mentioned getting their SunPass mini billed in NJ and ME, so maybe Florida doesn't know the full extent of their interoperability???

Illinois is now only issuing sticker transponders, so it probably works just fine most everywhere now.

One interesting question.. E-ZPass discrimination was legal with "because you can have many and swap them" court decision.
Stickers cannot be removed and reapplied....

But reapplying a sticker transponder is not how they're intended to be used. The intent is that you obtain a new one. They should be free (if an agency charges for a sticker transponder then that is shitty)

I-Pass stickers are indeed free, and I've been able to order 4 stickers despite only having been tolled on one of them (no monthly fees on any of them either makes it stress free to order one for every vehicle). It was just a little annoying having to peel it off when my old vehicle finally croaked.

The point is that issuing only stickers without a transponder option violates the principle of the ruling that agencies can offer discounts to motorists using their own transponders, because it's impractical to just order a bunch of stickers and take them off whenever you visit an area offering a discount for a different transponder and apply a new one once you leave.

[SSOWorld]

Chart link in OP has been updated to reflect TX agency tag merge and some housekeeping.

[vdeane]

Wait, am I reading that right?  The Texas tags are accepted in New Jersey?

Are the Bay City tags accepted at other MI toll facilities?  Might be a good idea to add a note about that.

[SSOWorld]

Wait, am I reading that right?  The Texas tags are accepted in New Jersey?

Oops

Are the Bay City tags accepted at other MI toll facilities?  Might be a good idea to add a note about that.

Read between the lines. If there is no Y in the box, they're not compatible with that entry.

[Molandfreak]

SunPass Pro is not compatible in Colorado? Or is that unclear?

[ElishaGOtis]

SunPass Pro is not compatible in Colorado? Or is that unclear?

I believe that's correct, SunPass (regardless of its type) is not officially accepted in CO

[vdeane]

Wait, am I reading that right?  The Texas tags are accepted in New Jersey?

Oops

Are the Bay City tags accepted at other MI toll facilities?  Might be a good idea to add a note about that.

Read between the lines. If there is no Y in the box, they're not compatible with that entry.

Right now there is a big X - the same X that every state has with itself.  There's nothing otherwise saying either way on the chart, so I can see how someone who doesn't know about Michigan's tolling quirks would assume that all the Michigan tags would be compatible across Michigan given that such is how it works in every other state (I see now how there's a quirk with how Colorado is noted as being compatible with itself - but doesn't such imply that Texas and Florida aren't?).

[Great Lakes Roads]

https://thetollroads.com/driving-the-toll-roads/tolling-accounts/out-of-state-travel

As of June 1st, people with an account on The Toll Roads (a tolling agency in Orange County, CA) can now use their transponder in North Texas (DFW and Tyler).

Here's the catch- NTTA Customers are not currently able to use their NTTA TollTag to pay tolls on The Toll Roads, we are working towards two-way compatibility.

[pderocco]

https://thetollroads.com/driving-the-toll-roads/tolling-accounts/out-of-state-travel

As of June 1st, people with an account on The Toll Roads (a tolling agency in Orange County, CA) can now use their transponder in North Texas (DFW and Tyler).

Here's the catch- NTTA Customers are not currently able to use their NTTA TollTag to pay tolls on The Toll Roads, we are working towards two-way compatibility.

Great. That's right on my way to work.

[hwyfan]

https://thetollroads.com/driving-the-toll-roads/tolling-accounts/out-of-state-travel

As of June 1st, people with an account on The Toll Roads (a tolling agency in Orange County, CA) can now use their transponder in North Texas (DFW and Tyler).

Here's the catch- NTTA Customers are not currently able to use their NTTA TollTag to pay tolls on The Toll Roads, we are working towards two-way compatibility.

To achieve full interoperability with California toll roads, Section 27565 of the California Streets and Highway Code has to be amended.  The section, which deals with electronic tolling, presently has a restriction on the sharing of information out of state.

There is currently a bill (AB-334) in the California legislature that is looking to amend Section 27565 to permit such data sharing.  If it should pass the legislature and be signed into law, it is likely that California and Texas toll facility electronic toll interoperability would soon occur thereafter.

[hwyfan]

Why did Central Florida Expressway Authority stop working towards expanding interoperability for their E-Pass Uni transponder beyond the E-ZPass states?  A FAQ on their website posted several years ago had a statement about how they anticipated interoperability with the Central States hub in the near future. 

-------------
Frequently Asked Questions - E-Pass

Will my Texas TollTag, Kansas K-TAG or Oklahoma PIKEPASS work in Florida?
Yes, on a limited basis. On February 27, these passes will be accepted in Florida on Florida Turnpike Enterprise and FDOT-owned expressways.


CFX will soon accept toll payments for vehicles using the Texas TollTag, Kansas K-TAG and Oklahoma PIKEPASS toll passes on CFX expressways, effective date to be announced.

When using these passes, you will be charged the electronic toll rate.
---------

It's now several years later and no such interoperability exists in Central Florida.  CFX declines to offer any update about this on social media.

[ran4sh]

I wonder if anyone with a Georgia Peach Pass has actually tried using it on the Ohio Turnpike or Indiana Toll Road. Georgia says it is interoperable; but recently I used those routes and, in Indiana the gate at the toll booth wouldn't open, suggesting that my Peach Pass wasn't read; and in Ohio the display indicated "invalid E-ZPass". Hopefully I don't miss out on any discounts when I end up paying that toll

[vdeane]

I wonder if anyone with a Georgia Peach Pass has actually tried using it on the Ohio Turnpike or Indiana Toll Road. Georgia says it is interoperable; but recently I used those routes and, in Indiana the gate at the toll booth wouldn't open, suggesting that my Peach Pass wasn't read; and in Ohio the display indicated "invalid E-ZPass". Hopefully I don't miss out on any discounts when I end up paying that toll

Now I'm curious how people in Illinois who get stuck with the new sticker transponders fare on those roads.  If they (especially the ITR) can't read stickers, then Illinois really shouldn't be issuing them.

[Great Lakes Roads]

https://legiscan.com/LA/text/HR220/2025

The state of Louisiana passed a toll bill that includes this:

"A RESOLUTION

To urge and request the Department of Transportation and Development to study the benefits of providing easier access of Geaux Pass toll passes to the public; to study the benefits of creating a Geaux Pass local office in Belle Chasse, potential improvements to Geaux Pass customer service, and causes for the delay in the commencement of Geaux Pass for the Belle Chasse bridge project; to provide recommendations to improve for future projects, similar to the Belle Chasse Bridge project; and to study integrating Geaux Pass with the Lake Pontchartrain Causeway and other states' tolling systems."

...

TLDR- Louisiana might as well join the SE and Central interoperability hubs.

[ElishaGOtis]

https://legiscan.com/LA/text/HR220/2025

The state of Louisiana passed a toll bill that includes this:

"A RESOLUTION

To urge and request the Department of Transportation and Development to study the benefits of providing easier access of Geaux Pass toll passes to the public; to study the benefits of creating a Geaux Pass local office in Belle Chasse, potential improvements to Geaux Pass customer service, and causes for the delay in the commencement of Geaux Pass for the Belle Chasse bridge project; to provide recommendations to improve for future projects, similar to the Belle Chasse Bridge project; and to study integrating Geaux Pass with the Lake Pontchartrain Causeway and other states' tolling systems."

...

TLDR- Louisiana might as well join the SE and Central interoperability hubs.

How to get customers fast: Join both the Central Hub and the E-ZPass IAG.

That may not actually be a good thing if each customer causes the state to lose money but hey it's a thought... it would be extremely useful if they go through with tolling the I-10 bridges.

AlSo ThAt'S a ReSoLuTiOn NoT a BiLl

[I-55]

I wonder if anyone with a Georgia Peach Pass has actually tried using it on the Ohio Turnpike or Indiana Toll Road. Georgia says it is interoperable; but recently I used those routes and, in Indiana the gate at the toll booth wouldn't open, suggesting that my Peach Pass wasn't read; and in Ohio the display indicated "invalid E-ZPass". Hopefully I don't miss out on any discounts when I end up paying that toll

Now I'm curious how people in Illinois who get stuck with the new sticker transponders fare on those roads.  If they (especially the ITR) can't read stickers, then Illinois really shouldn't be issuing them.

I'm going to assume that the ITR has no issue reading I-Pass stickers since they make up 70% of electronic transactions on the ITR, and if there have been issues I'm sure I would've heard about them after a full year of switching to stickers. I've started to see more and more people in NE Indiana with I-Pass sticker transponders. I'll be able to test my sticker in OH/PA in a couple weeks, one of my friends recently made the trip and had no issue with his sticker in either IN, OH, or PA.

Related, I posted a little further upthread on how my old SunPass mini sticker was read at all 3 plazas of the WV Turnpike (despite SunPass mini supposedly not working in traditional E-ZPass territory). This makes me think this could be just a PeachPass problem and not a general sticker problem.

Another thing with using transponders out of state: make sure your balance is high enough to cover your entire trip more than a day in advance. My SunPass read on the WV Turnpike but I was stopped at the toll booth for "low balance" because I updated it after the most recent reciprocity sync. I doubt this was the PeachPass issue but each toll road has its quirks.

[sprjus4]

With Florida joining E-ZPass and Texas just a few states away, along with Louisiana and Alabama getting ready to toll I-10, all of them ought to be on the same network of tolling systems.

Imagine driving from Florida to Texas on I-10, and needing 4 different tolling systems (E-ZPass / SunPass, Alabama and Louisiana's tolling tags, and TxTag). I'm not saying they need to be the same system, but they all at minimum should be interoperable with one another.

Louisiana and Alabama, since this is their first major tolling projects (I know there's smaller toll roads in both states) should realistically just join E-ZPass, but again at minimum should both accept E-ZPass and TxTag systems.

E-ZPass and the TxTag network (Texas, Oklahoma, Kansas?) should seamlessly work with each other.

That simple change would make the vast majority of the United States interoperable with one another, the sole exception being that toll road South Carolina has along I-185 and their own pass, but it's not like anyone actually uses that highway to begin with - it's a failed project.

[vdeane]

Another thing with using transponders out of state: make sure your balance is high enough to cover your entire trip more than a day in advance. My SunPass read on the WV Turnpike but I was stopped at the toll booth for "low balance" because I updated it after the most recent reciprocity sync. I doubt this was the PeachPass issue but each toll road has its quirks.

Odd, I never heard of that.  Are you not on automatic replenishment?  I've had my account even go negative briefly on trips with no issue.

[I-55]

Another thing with using transponders out of state: make sure your balance is high enough to cover your entire trip more than a day in advance. My SunPass read on the WV Turnpike but I was stopped at the toll booth for "low balance" because I updated it after the most recent reciprocity sync. I doubt this was the PeachPass issue but each toll road has its quirks.

Odd, I never heard of that.  Are you not on automatic replenishment?  I've had my account even go negative briefly on trips with no issue.

I have auto replenishment on for my I-Pass account at $20, which isn't an issue in IL where you only pay a few cents to a dollar at a time, but on ticket system turnpikes I need more than that to cover the larger fees. The SunPass account I had forgotten about (since my parents got it 6 years before SunPass/E-ZPass interoperability) and had $4 left on it when I passed through the Ghent Plaza. It wasn't on any sort of auto-replenishment since it we hadn't used it in several years (until we unknowingly were using it on the Louisville bridges once interoperability began, it still had around $15. I forgot all about it until I had $4.25 in my hand sticking out the window at Ghent).

[ran4sh]

With Florida joining E-ZPass and Texas just a few states away, along with Louisiana and Alabama getting ready to toll I-10, all of them ought to be on the same network of tolling systems.

Imagine driving from Florida to Texas on I-10, and needing 4 different tolling systems (E-ZPass / SunPass, Alabama and Louisiana's tolling tags, and TxTag). I'm not saying they need to be the same system, but they all at minimum should be interoperable with one another.

Louisiana and Alabama, since this is their first major tolling projects (I know there's smaller toll roads in both states) should realistically just join E-ZPass, but again at minimum should both accept E-ZPass and TxTag systems.

E-ZPass and the TxTag network (Texas, Oklahoma, Kansas?) should seamlessly work with each other.

That simple change would make the vast majority of the United States interoperable with one another, the sole exception being that toll road South Carolina has along I-185 and their own pass, but it's not like anyone actually uses that highway to begin with - it's a failed project.

SunPass and NTTA TollTag have been interoperable for several years now

[ran4sh]

I wonder if anyone with a Georgia Peach Pass has actually tried using it on the Ohio Turnpike or Indiana Toll Road. Georgia says it is interoperable; but recently I used those routes and, in Indiana the gate at the toll booth wouldn't open, suggesting that my Peach Pass wasn't read; and in Ohio the display indicated "invalid E-ZPass". Hopefully I don't miss out on any discounts when I end up paying that toll

Update to this, the Ohio toll (which, their display claimed "invalid E-ZPass") actually was processed correctly, and now shows up in my Peach Pass account.

I also incurred a PA toll (which hasn't showed up yet) and further along on this trip I will have NJ, NY, NH and maybe MA tolls, so we'll see if those states work

But on my return trip to Illinois I won't have any tolls west of NY. So I won't have to deal with OH or IN tolling.

[I-55]

I wonder if anyone with a Georgia Peach Pass has actually tried using it on the Ohio Turnpike or Indiana Toll Road. Georgia says it is interoperable; but recently I used those routes and, in Indiana the gate at the toll booth wouldn't open, suggesting that my Peach Pass wasn't read; and in Ohio the display indicated "invalid E-ZPass". Hopefully I don't miss out on any discounts when I end up paying that toll

Update to this, the Ohio toll (which, their display claimed "invalid E-ZPass") actually was processed correctly, and now shows up in my Peach Pass account.

I also incurred a PA toll (which hasn't showed up yet) and further along on this trip I will have NJ, NY, NH and maybe MA tolls, so we'll see if those states work

But on my return trip to Illinois I won't have any tolls west of NY. So I won't have to deal with OH or IN tolling.

I know with I-Pass you can see if it scanned your transponder or billed by the license plate associated with your account. I would check and see if your Peach Pass scanned or if it was by license plate. If it doesn't say on your account page I would check your bill against the Ohio Turnpike Toll Schedules to see which category it fell in.