That sounds like a great plan, but would the person be required to bring in the Placard in order to rent one

( if you park in handicapped parking your placard or tag must be displayed) I supposed they could just use their ID card issued with the placard ( at least then new ones here in SC comes with a card for your wallet that shows your info and what type of placard you have been issued).
Does anyone know if WDW would be mandated to make room for Segways on the buses if they are the vehicle of choice for the guest using them

?
I did not read the entire Federsl Register this time, but did read it previously and read the blog. My understanding is that the proof of disability can include verbal assurances (i.e. The person could be asked "are you disabled. Are you using the Segway because of your disability?").
If the answer is "yes", that is the credible verbal assurance. That is the way it is with dogs and we have just been debating how messy that situation is.
As far as Handicapped Parking permits, I don't know about all states, but Minnesota does not also give a wallet card along with the placard, so if needed to use a permit to show our DD was disabled, we would need to bring our placard with us and not park in the handicapped parking.
And, yes, that would include buses and all the other means of transportation.
Honestly, I would think Segways would be safer than ECVs (for those that they would work for), they have a smaller foot print, are more maneuverable and generally the people riding them would be better at using them than ECVs, because they wouldn't be rented, they would be used by experienced riders. Don't get me wrong, I have nothing against ECVs, but I am just saying that I don't see the safety issues. CMs (Disneyland Resort) use Segways even when the parks are extremely crowded and their walkways are a lot smaller than WDW and there hasn't been an accident yet. I do think they should have to pass a safety course (but I also think that those using ECVs and Wheelchairs should too). This could be done once and a card issued for AP holders, so that they wouldn't have to do so every time they come into the park.
I agree that there should be more instruction for guests using ECVs. When my FIL rented one in the parks, the rental CM did do a quick rundown of rules and operation.
Only one of the offside companies does this with ECVs that I am aware of - Randy's requires a personal delivery so their staff can go thru those things in person with the renter. The majority of offside rental ECVs ate just left at Bell Services or the front desk for the guest to pick up.
If we had $1 for every guest that my DH had showed the speed control on rental ECVs, we would not be rich, but could buy lunch. That's pretty basic, just to know it exists and that "the turtle is your friend".
People have mentioned many times "the CMs ride Segways" as proof of safety for guests to use them, but there are several important differences that Cheshire Figment brought up:
1) The CMs using them are all familiar with the parks, so they are not on the Segways sightseeing in an unfamiliar location.
2) The CMs using them have gone thru training and passes proficiency before going out in the parks.
3) The CMs are riding them in open spaces, not in lines or buildings.
3) The CMs are staying on them, not repeatedly mounting and dismounting.
The open space part is important. If Segways are allowed in any areas open to pedestrians, that means anywhere. In all buildings, in restaurants and shops. In lines and attractions. I know there are some lines that are wheelchair accessible, but not
ECV accessible. I think the argument will be made that since a Segway has a smaller footprint and is more manouverable than an ECV, Segways should be allowed where ever wheelchairs are.
I can personally see it might work out well for people using Segways in shopping malls, zoos and museums because, in general, there are well established traffic patterns ( most people operate in shopping mall walkways like they do on roads) and also the activity is moving from place to place to see the zoo animals, store windows, etc not getting on and off rides like at WDW.
Doorways into shops are mostly wide and tall, so no stooping would be required to clear the doorway. This would not be the case in all places at WDW, where things are themed to look like old buildings or more 'human scaled'. I've been shopping at Mall of America during very busy Christmas season, and even then, someone using a Segway could probably operate safely at Mall of American because of the traffic flow and space - I, at least, have never seen a 'can't reach your arm out away from your body' crowds at the malls like are commonly encountered at Disney parks ( and not necessarily even at busy times).
The last point is mounting and dismounting. When this subject first came up several years ago, there were quite a few videos on
YouTube showing people with disabilities mounting and dismounting Segways. Many involved devices like a bar on the wall or another person to hold the Segway steady while the user mounted it. Interestingly, I can only find a few videos on youtube now and most involve a seat placed on the Segway so the user can sit. (This brings up another point, since the Segways with sears operate by placing something on the standing platform, which falsely tells the Segway that someone is standing with both feet on the Segway. This sensor is a safety device, which normally shuts down the Segway if the user does not have 2 feet on the platform, so the seats allow one of the safety devices built into the Segway to be circumvented.
In the event of an emergency shutdown, users need to be able to safely get off the Segway and have 10 seconds to do it, according to the Segway manual and the Segway tour classes I've taken. For people who are using other things (another person, a wall, a bar) to get off their Segway, how would that be available and where, just moving around, but also for attractions where a transfer to a ride seat is needed?
Even if a person can get off completely unaided, the Segways still need to be stored while the person is one the ride ( space is already a consideration at most attractions) and it has to be where it can't be knocked over ( unlike wheelchairs and ECVs which are on more than 2 wheels.
As I mentioned, I can see that there are certain places where a Segway might be safe to use, I just don't agree that a theme park is one of them. And it basically has much more to do with the device itself, rather than how they are used. Having been on the Epcot Segway tour 3 times, I can certainly understand the feeling of freedom that gliding along can give. The freedom just needs to be used with common sense.