Will Electric Roads That Charge EVs Become Mainstream?
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- čas přidán 25. 07. 2024
- Electric vehicles are on the rise, capturing a growing market share. A lack of charging infrastructure is a common hurdle but electric road projects, like Detroit's upcoming initiative led by Electreon, offer wireless charging while driving, promising versatile solutions for various vehicles. Will this innovation prove to be necessary as EVs gain popularity especially in rural charging deserts and in high-traffic areas?
Chapters:
00:00 - Introduction
01:54 - How it works
04:43 - Projects around the world
08:11 - Public transit
09:30 - Mass adoption
Produced and edited by: Liam Mays
Animation: Jason Reginato
Supervising Producer: Jeniece Pettitt
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Will Electric Roads That Charge EVs Become Mainstream?
Road maintenance is already financial hell for local municipalities. I can't imagine how adding this would make it any easier or worthwhile
US municipalities should abolish car-centric urban design anyways. This technology could potentially save up a lot of money in fuel.
@@jascrandom9855 NO
It's always a cat and mouse game with technology. Fix one problem and another will arise.
@@saulgoodman2018 no what?
Ul
Why not just build tracks made for vehicles with steel wheels. These vehicles can be attached to each other for higher capacity and then powered by an overhead power line. There are some other countries that have this technology put to good use I think we should explore it more! #BuildTrains
Sounds good for certain use cases, but that's not how the majority of vehicles are used.
every day someone proposes a new way to reinvent something that trains already do😔
@@Ausf bikes? busses? mini cars? it's all possible
@@AusfThe right tool for the right job. Imagine wireless chargers in the cell lot/taxi lot at airports, hotels, etc. If you've ever been to NY, Las Vegas, etc and seen all those idling taxis, you can start to get a grasp on how good of a tool this could be.
@@IrvinDBZFANWe need someone to invent a way for trains to magically appear in the middle of cities without displacing large numbers of minorities.
Cool concept, but I think I would rather have funding put towards better trains and buses in the US.
no i don't wanna smell other people's sweat in public transportation
@@bora--bora wear a mask then lol
@@bora--bora Investing in transit reduces traffic even if you never personally ride transit. A person riding transit is a person not on the road.
no i prefer my car id rather not walk from a bus station to my home
I don't think putting trains and bus stops outside every house is going to be a desirable way of commute. Nothing is walkable. So you have to put it outside literally every groups of houses. And then somehow make walking to a bus stop and waiting at every other stop for passengers faster than just getting in the car of your driveway and driving 10 minutes to the grocery store.
So you rather fund this costly BS than actually building high speed rail.
I agree with this. We need better options for transportation. High speed rail would be so much better.
@@Phostings1 electric, self driving, 150 mph, bring American manufacturing job, bring Americans construction job, help with small business… or we get this BS get people from point A to B ineffectively
@@Phostings1 how many people are needing to travel hundreds of miles away for work every day? i'll give you a hint.. its really really low. most people in their day to day lives probably dont go more than 20 or 30 miles away from home. while long range trips are a bit of a sticky point right now, it would be far better to spend money on electric grid infrastructure and charging stations at places of mass congregation. the parking areas in most cities are already there, and you dont need to tear up roads in cities.
@@time2fly2124 or you can have light rails, trolly buses, regional rails.
@@time2fly2124 We are already tearing up roads, but for good reason, improving bike/bus/ped access. Also, the point of HSR is to largely get people off planes in certain key corridors. As far as commutes go, we need to get people into more denser areas and provide better local transit
wait till the electric roads people find out about the concept of electric rail. "self driving", 100% electric, can easily go 150mph at the same time while you read a book or work on your laptop. TL;DR, WE NEED TRAINS
Who's going to be paying for these electrified roads? Taxpayers already put in $200B to fix the broken highways we have now so why don't automakers contribute more?
Sweden and the Nordics already have trains. You can have cars and trains you know.
We need more efficient transportation options and better urban design. Not more cars regardless how they are powered we are not solving the problem. We need less roads, car parks, and ugly strip malls that litter the landscape of every American city, town, and highway. Bring back walkable areas to urban environments and green paths. If we want to invest in electric we need to invest in inner city trams, trains, and more efficient road ways.
Automated cars will require fewer cars on the road.
no they won't
@@shutinalley
@@shutinalleylitterally how… this would only happen is if we put multiple people in these cars at once
to make them more efficient:
we made them wider to hold more people; set them on pre-set routes so that there’s a consistent and predictable commute; gave these cars their own right of way so they don’t get stuck in traffic; use steel wheels on self guided tracks to simplify operations and maintenance; placed a 3rd rail with electricity so the weight of the battery can be removed.
oh crap i’ve made a train…
@@malachyfernandez6285Guess how many people are in a car most of the day: zero.
Guess how many people are in a taxi during the day? Usually at least two.
@@shutinalley No they won't, if anything it will generate more traffic as companies try to be the first to pick you up.
When there is no fare, they will circle the neighborhood.
Stop buying into the "Tech will save us" pipe dream.
I can see parking spaces with a spot that charges compatible cars being a thing, but roads doing that is just a silly idea - fun only totally not feasible in any way.
That makes way more sense! Park and charge.
You wont park because the car will go to somebody else while you aren't using it. Owning a car and parking it is stupid.
@@shutinalley So are you saying charging roads is a good idea or do you expect cars to run on magic?
Parking spots that charged cars when parked is by far the best solution, no messing with cables and no need to the charging furniture taking up space on the sidewalks.
As for owning a car it depends. A car can be a pretty personal thing, but if you just see it as transport and not a personal space then sharing is fine. Btw. calling owning a car stupid is rather insulting to people that don't share your views, might I suggest a change of tune.
@@bzdtemp Look up solid state batteries. I promise, it's not magic.
@@bzdtemp Of course charging through roadways is a good idea. Especially now that solar is changing the game of local energy storage.
Not gonna happen. Sounds like maintenance nightmare.
Simply expanding the charging infrastructure for EVs (and making sure they actually work) would probably cost far less compared to digging up roads and laying down coils. Plus, induction charging is way less efficient than wired charging.
but still more efficient than ICE vehicles.
You do it during repairs or such.
Our entire roadway infrastructure is outdated anyway. it needs to be completely overhauled.
@@shutinalley overhauled with transit
@@shutinalley Must be the US if you are saying that.
The US can’t even maintain its current roads and bridges. The desperation of the EV pipedream is absolutely comical.
cause there's too much car infrastructure.
Don't call it EV desperation, even EV enthusiasts recognize how stupid this idea is
What a great idea! Now obviously it'd be prohibitively expensive to make EVERY road like this, so you'd have to prioritize it on some major roads and ignore the smaller ones. And since you are building specific routes designed around a specific vehicle, you no longer have the point to point access to justify using it for single-person vehicles, but we could use it for point to point travel for say, buses, or freight. Now of course, those have pretty high energy demands so it may be more efficient to charge them off of a cable or rail. In fact, why even pave the whole road? You could design the vehicle to work specifically with a track that goes between distribution centers carrying large quantities of passengers or freight! wait a second, did we just reinvent trains? ah shoot
Lol you had me at first
I agree, citiies that abandoned their trolleybuses when they are so much better and electric buses should be used only when necessary or available
😂 underrated comment!
You had me in the first half, not gonna lie.
Please cut the.cra@p! If you want 100% renewable and zero emissions at source were the fuel is made with renewable energy, and while driving. Just go hydrogen driven vehicles! Practical, 'tank empty to full in 6 minutes at a gas station or small emergency presure tank, less complex. easy to repair, greater lifespan, miles, cheaper per mile, more reliable, more friendly to resources and 100% recyclable!
The lengths America will go to to avoid building trains 😭😭
Electric roads are fundamentally stupid when cars spend ~90% of their existence parked, where even trickle charging is enough. Let alone maintenance and financial hell it would spawn for anyone convinced that its a good idea
It's just a front to separate gullible investors from their money . Remember solar roadways?
@@Dominik3636THUNDERFOOT COVERED THIS SO WELL ON HIS CHANNEL.
they are trying to convince people EV can work for longer distances... might not be in my lifetime though
Please cut the.cra@p! If you want 100% renewable and zero emissions at source were the fuel is made with renewable energy, and while driving. Just go hydrogen driven vehicles! Practical, 'tank empty to full in 6 minutes at a gas station or small emergency presure tank, less complex. easy to repair, greater lifespan, miles, cheaper per mile, more reliable, more friendly to resources and 100% recyclable!
@@PulledPorkGarage yes but when it blasts ..it will destroy area at least 50-100 meters
wait, did they just explain trains with extra steps and inefficiencies?
The induction charging is basically the equivalent of third rail
So it's a less efficient, more expensive, & technically complex version of overhead lines for trains but of cars. Why not just replace the roads with rails & use trains or use trolly busses which are busses that are powered by overhead lines?
Why not buy a horse?
@@BioniqBob Why would we do that?
@BobbyBear105 The car is the evolution of the horse & and carraige, which has a number of the same problems as the horse & carraige namely where to put when it isn't in use & just like a horse it is major financial drain, although in defense of the horse they only have a financial impact on their owner while cars require government funded roads that everyone pays for not just those who use them. One major difference is that the horse & carriage were generally either a bus, cab, or owned by the well to do whereas, at least in the US, most everything is designed around the expectation that everyone owns a car.
Now while it is great that transit like the car has become more affordable, it is terrible that this lead to the destruct of interurban railroads, bus services, & the decline of passenger rail, which while less time efficient were more affordable, resource efficient, & allowed people to live without owning a horse or car, & consequently not have to pay to store, maintain, & insure a car
@@devnom9143because if we do this, it funds businesses, and it will make the owners of those businesses rich. Duh. That's why we do most things. People are dumb enough to actually believe this is a good idea, so whoever came up with the grift becomes a millionaire
@@nishiljaiswal2216 Not you, devnom9143. "overhead lines" lol.
Imagine the amount of material and metal needed to cover just 10km, how much energy can you get into the vehicle over 10 minutes? Also there is bound to be transmission losses.
Good point
I read somewhere that wireless charging is super inefficient.
Potentially there are quite a few cars on that 10km stretch of road
@@MrZmaniscooldid you have to read it? Common sense?
You take 10 minutes to travel 10 kms? You must drive very slow. Most highways this system is designed for has higher speed limit than 60 kmph. So it's gonna be like 25-25 mins for a 50 km long road. Given how inefficient inductor based charging systems are, I'm pretty sure your battery level will not increase as the vehicles' battery will be drained more than it will be charged.
Also don't forget to factor in the additional weight your vehicle will be carrying due to the induction charger. Effectively you'll be reducing your vehicle's range by adding more weight. This factors in more when you account that not all roads have this induction charging technology. So for majority of the time, you'll be carrying around the extra weight of an induction charger while not using it. So instead of increasing the range, these roads indirectly are reducing the range. Kinda ironic that the outcome is exactly opposite to what they set out to achieve.
Stop funding stupid ideas.
Transportation engineer here. I, too, also love to have infinite money & manpower to pursue vanity projects.
Imagine the traffic when these roads needs maintenance. No thanks
PUBLIC TRANSIT.
Seeing the dislike ratio, i am Glad people are waking up to the fact that such projects are stupid
Luckily it doesn't matter what you think because you're broke 😂
@@user-ct8ee8od6o What a fake user you must be.
@@user-ct8ee8od6owe all are.
Oh... So like a... Rail... Road?
No no no, that would be too fast, too cheap, too quiet, too clean and too efficient. We don’t do that here in America
Almost there, guys. A few more decades and we'll start to appreciate trains again.
We still appreciate trains - those who don't are automakers and airlines who've lobbied against trains for generations. Hopefully people realize that having safe bicycle infrastructure and sustainable public transportation is a more efficient solution than electrifying roads and highways.
Wireless charging is too inefficient
Facts
Even in mobile phone wireless charging efficiency is about 30 % only
Okay, hang on. Every single wireless charger I’ve ever used has had a very clear warning on it saying not to sleep with it near your head or body, don’t sit near it for long periods of time and it’s not safe for people with pace makers. They’ll die if they’re on these roads because the electromagnets will interfere with it.
They're called "Overhead Electrified Trains", hope this helps! 😊
So, this article is either the product of complete incompetence and lack of due dilligence, and/or is just a marketing job by whatever company paid CNBC to publish this. Ignoring all practicalities, inductive charging has massive losses, can't do nothing about the physics. It's the equivalent of saying all gas stations will now have a hole in the refill tubes and at least half the gas you pay for gets spilt on the floor. Mass adoption would be a massive environmental disaster and waste of money.
Instead of electrifying the roads, which would get super expensive, why not just electrify the parking spaces or places vehicles stop?
Good idea. Question is how would the cars charge if no energy is deposited prior?
@@lightingninja1425 good question. I'm not an engineer but neither was Steve Jobs. You put out an idea and let the techs figure it out
In other countries, I don't know. But in the US, definitely not happening. For example, New York can't even keep up with fixing potholes on the roads. How can people expect them to keep up with any new infrastructure?
With rampant presence of potholes and waterlogging issues, this hardly seems as a feasible idea . roads are already in mediocre condition, with no proper maintenance in sight. Idea is cool and futuristic,not sure about efficiency tho.
Workable or not,Only time will tell i guess
EVs are gonna be future..so
It's now seven years, our local public roads still under construction causing heavy traffic.
The definition of insanity.
We need our own bullet trains
As an avid EV enthusiast and someone looking for the electrification of more transportation options, I think this is a step in the wrong direction.
Productive charging creates lots of waste heat (energy). The whole point of electrifying vehicles is to make them use less energy overall. Unless the heat can be salvaged for both the road and the car and used in heat pump systems. I think this is terrible idea. Add on top of the fact that Michigan has the worst roads in the country and is the worst at maintaining them. This is a recipe for disaster
I’m doubting the practicality now but I think it’s a cool concept. Who knows maybe it will work great. Every new innovation is faced with backlash from people who constantly complain about stuff. Criticizing what they currently have is good enough. But once it’s released and realize it’s useful, people hop over.
Just build over head lines for busses please!!
The static chargers at bus stops and loading bays is the way forward because despite cars being a majority, it is the commercial sector which often pollutes the most. A bus that can wirelessly charge when picking passengers up and a truck delivering in specific loading bays will help to reduce the environmental impact. In cities and towns especially here in the UK, they are creating clean air zones for these places so you have to pay of your car or commercial vehicle is not within tolerances. Creating these wireless charging create a cleaner environment than ever before.
Inductive charging is so much less efficient than using a cord. It doubles line losses due to having to be converted twice between AC and DC. It will never be cheaper than simply installing more EV charging stations, which is a much more efficient approach. Even installing regular outlets near parking spots for level 1 charging would be a massive improvement over what we have now, and at 3-5 mi. added per hour is more than enough to cover a daily commute for most people. Now there are only a small fraction of charging spaces compared to the number of EVs.
I'd like to find out what the Environmental Impact Assessment is on this type of project. Does it answer:
1. If the electromagnetic fields will affect electronic devices or other electromagnets?
2. If there is risk of exposure to radiation?
3. What happens when a car is fully charged and still exposed to the energy?
Cars are going to go away as primary transportation. You will see more people adopting PEV’s to get around, as people are getting tired of the high costs of vehicles and dealing with congestion and more. Look how many of the next generation don’t even care to get a driver’s license.
Slot car history goes back to 1912 when the Lionel Train Company introduced the first models as an accessory for model train sets. Their model cars were similar to their trains in that they ran on a pair of elevated platforms with an electrified track in a little trench down the center.
I wish someone would solve the problem of trucks on our highway. They should have their own lane.
at that point just create bullet trains on major highways
We are not there yet. We should invest on improving public transportation. Trains, buses, etc. So that we can be on par with european and asian countries.
Overhead lines for trolley buses are way cheaper and easier to maintain. Also forget cars, it's much more effective to charge them when they're parked because they're not in constant service like buses. Curing "charging deserts" with parking spot charger incentives is much cheaper than this maintenance hell of a pipe dream.
This idea is dumb
I could see roads with inductive charging _possibly_ be successful for city bus routes. Because buses travel the paths over and over again which greatly improves utilization and improve ROI on the project.
But whether personal passenger vehicles can use them will be limited to how expensive it is to install the induction receiver antenna and related control electronics on a personal vehicle. If the charging road network isn't built out enough, the ROI for personal car use will be low so adoption will be low.
Make race track like that, with autopilot. Twisted metal next
Parking lots would be best place to start in my opinion.
Cars are idle more times than not and would reduce need for reserved EV parking spots
Might as well make a train track with wireless charging.
I know it won't happen anytime soon but I could think of a couple of Freeways here in CA with constant traffic that EVs could charge up while sitting in traffic.
I think if our minds can charge our phones and stomachs, that will be mainstream.
I heard this idea a long time ago. It is a good idea, it is just the maintenance and cost to build these kinds of things are too much. But I think, over time it will be done due to advancing technology
If you are a young car enthusiast in the US, chances are you care about two things: how fast your car can go and how much fun you can have inside it. But that doesn’t mean you should ignore the science behind the machines. Cars are more than just engines and wheels; they are complex systems that require constant innovation and improvement. The car industry is changing fast, and so are the customers’ demands. Gone are the days when car makers could mass-produce a few models and sell them to everyone. Now, they have to offer a wide variety of products that cater to different tastes and needs, and be ready to adapt to the changing market conditions. This is the new era of small-batch, high-volume production, where the science of cars is more important than ever.
Couple of things. How is the electricity charged to the user? And what about breaks caused by earthquakes or even frost heaves. A crack in the road can just be sealed currently and road is OK, but if the circuit is broken the road will have to be dug up?
It's a pity that nowhere in the video, it was mentioned about the efficacy of this technology, i.e. How much charge you could actually get while driving and wheter it is actually possible to fully recover the the energy that is consumed while moving.
We’re slowly reinventing the train
why reinvent the bicycle?
trolleybuses have been around for decades
adding batteries to them would reduce the need to build the overhead wires along the entirety of the route
much cheaper that integrating the charging infrastructure into road pavement
power collectors/trolley poles can be added to EVs as well
no need to stop to charge your vehicle
Efficient is not a word I'd associate with wireless charging ( understatement),
Made especially worse by the gap needed.
I mean there are lots of places here in the US without clean running water. (Lead pipes, failed infrastructure that people paid taxes on for decades and the money goes to other projects...) Maybe we should deal with needs before wants.
Maybe try to fix roads first and actually lighting of streets and highways I find myself in certain areas where it’s completely dark you have to get part one right first before you skip to 10
I wonder if they can figure out a way to place it on top of existing roads and ensure they are durable to make it cheaper to install.
Now connect them all together and put them on some metal rails and you will have real transportation.
I am not sure how feasible or practical would be having charging EVs while driving since many technical and non-technical factors involved, but charging in parking spots using similar technology like our smart phones get charged wirelessly is more practical and feasible in near term. Once car pulls up in ev charge available parking spot, the driver get notified, and authorize to charging to start providing car encrypted id into the system for charge cost, also getting back information how much is cost per kW, how long it will take to charge, etc. info sent through car app as well.
Please cut the cra@p! If you want 100% renewable and zero emissions at source were the fuel is made with renewable energy, and while driving. Just go hydrogen driven vehicles! Practical, 'tank empty to full in 6 minutes at a gas station or small emergency presure tank, less complex. easy to repair, greater lifespan, miles, cheaper per mile, more reliable, more friendly to resources and 100% recyclable! No tax money has to be spend on impractical invasive EV crazy expensive infrastructure mega projects .! No geopolitical national security rare metals OPEC type etc kartel and monopoly dependencies!
Soon the headlines will read “Person hit by car while trying to charge their phone in the road.”
What about charging costs? Who pays the bill?
Maybe they going to charge us by the mile we drive
Would like to see more love for trolleybuses. Seattle still uses them. Seems a lot of this got solved decades ago.
Why not make more fuel- efficient engines that give say, 1000 miles per gallon?
Tunnels = protection & avoidance of private boundary issues
4:35 It's funny to hear these numbers, which people seem to simply agree with - or do not oppose - but when we talk about the cost of rail per mile...
Which, in fact, can transport more people and cargo, and with more efficiency.
There is a company that offers something similar now. Charging pads in front of street lights that charge while waiting
I don't even have to watch this video to know that the answer is an unequivocal and resounding NO. We already have vehicles that are powered while running and they're called trains and electric buses.
I could picture an EV Express lane with automated driving. Imagine taking a nap on a long slog of roadway.
This would be too expensive for most places. I could see it working in places like Manhattan where car emissions from taxi, trucks, busses and car shares is a serious problem (private cars should not be on Manhattan streets). You could have electrified roads and have busses and taxis driving all day without the need to charge.
seriously efficient system this dynamic charging system was my seminar topic in 2017 still not much have been here in the field of this plus static charging can be much better than this but still there are much more limitations in implementing as such in general i would say its dumb while it would be more effective in target area provided a separate lane or something is given. It would be suitable to spend more time and efforts in giving a supercharge/fast charging infrastructure that can solve much more wider area than this!! this is my take idk if the company behind this have any unique factor that can reduce the inefficiency in this system if so even if they have this wont be much effective outside the targeted area plus i am not discouraging anyone still from a electrical and electronics engineer view point this is what i can conclude.
I´d guess this will be way too costly for roads, but it makes a lot of sense for city busses. No need to upgrade the road, the bus stops would be enough. Each 30 second stop would charge a few miles of distance. And it would reduce the need for a huge, heavy and expensive battery.
if only there was a fast, efficient vehicle that traveled on its own special roads that gave it power! And since these roads are dedicated, they can have steel wheels and be really big and long. That would be so exciting.
Let’s work on the potholes first 😂
Just have the power attached overhead with wires from lines to supply power. Instead of self driving camera just let the cars follow defined tracks. Steel wheels will last longer than rubber wheels. You can even use opposing magnets to levetate and minimize friction to increase speed. If we attach multiple cars together that would be very efficient and avoid traffic jams. Don't make folks buy individual cars or pay for parking, but allow various pay for use structure when they need it. Run on a strict daily schedule so folks can plan their life and embrace this method of travel. Supply reliable wifi so folks can work while traveling. Keep the cars safe and clean also. I am studying Civil Engineering and have more great ideas like this.
It seems that just putting strong permanent magnets in the road should work reasonably well since the vehicle is moving across them anyway. I guess that may add drag and erase peoples credit cards / hard drives, but it could be shielded.
Huge blocks include the cost of tires, risk of fires, availability (lack of) repair, and low long term reliability
Cool idea in concept, just like tunnel networks underground to connect cities, but I don't see very high real life feasibility if at all.
this would be interesting to have as a parking spots instead of road?
The goal should be getting individual vars off road. Better public transit. This coming from a guy that goes for drives for fun, i love cars but they gotta go.
And the same roads can produce electricity if they use the car weights, the road heat etc, its a Win Win!
It's an interesting concept and sort of a natural progression to the whole "gotta do EV" movement. However, these tests are limited in scope and the rubber will really meet the road when there's a high density of vehicles using the system that are taxing the infrastructure. But it would be a good time to start a maintenance company.
F-Zero X is gonna be a real thing
Totally unnecessary on roads, but yea on parking spots, makes sense. Also it’s a huge amount of costly infrastructure.
Totally not necessary. Level 2 charging placed nearly everywhere, at extremely less expense, means everyone can plug in for even a few minutes running errands and their car will be nearly at full range at all times. Not to mention the added expense of repairs in four season areas like Michigan. The freeze/thaw, snowplows, potholes, etc. just makes this a non-starter. By the time this is done with pilot projects there will be plugs everywhere.
What is the efficiency ? How quickly it charges the car or How many miles it adds for one mile travel on the road? How much it cost to lay a 1 mile of this road?
wow! this could be a really great new concept!
I've always said that if you want adopters then you need to put electrical vehicle charging at where people are at for long periods of time. So Apartment complexes because residents don't have access to install a home charger. Workplace complexes, cars sit there 4-5 days a week perfect time to charge. Destination spots/hotels. Also not just 1 or 2 chargers like 25+ at each location.
Our power grids are not ready yet even for charging EVs with cables, imagine powering these roads, where the charging efficiency can’t even reach like 10%…
Good idea but I would like to hear how efficient these chargers would be. Phone chargers are already not efficient and they’re in contact with each other. I can’t imagine a car with a 6 inch or 1 foot gap being able to charge reasonably.
Ups... dropped my phone... oh... wait a minute... How did I get a 100% charged battery. 😀
As the owner of an electric car the idea of drive in a high magnetic flux does cause the hairs on the back of my neck stand up.
Is there a possibility for the electrified portions of the road will be warm enough to melt falling snow and ice and this won’t require deicing agents?
Anyone know what’s the music played in the end? It’s so good!!
A diesel bus holds 125 gallons of gasoline?🤔
I've been seeing more Tesla Cars in my state Georgia recently.
I don’t think we need this in city’s and towns but I could see this on the highways for people traveling long distances. For people not traveling the 300ish miles a electric car can get is way more then you need in a day so your able to charge it up at home daily.