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Published on January 5th, 2009 | by Andrew Williams

71

Piezoelectric Road Produces Electricity From Traffic

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Engineers have created a new type of road capable of turning the vibration caused by cars into electricity.

The revolutionary new surface, created by engineers at the Technion-Israel Institute of Technology, uses piezoelectric crystals embedded in the asphalt to generate up to 400 kilowatts of energy from a 1 kilometer stretch, enough to run eight electric cars.

Commenting on the innovation, a spokesman from the UK Environmental Transport Association said, “Many predict a massive shift to electric cars, and it may be the roads themselves that help provide some of the power needed.”

The new surface is scheduled to be tested in Northern Israel later this month and, if successful, may be rolled out on a larger scale in the UK and Ireland.

If the system was rolled out on a large enough scale, and accompanied by a mass adoption of electric cars, it is possible that a virtuous energy loop could be created, capable of drastically reducing carbon emissions from transport. Even if electric cars fail to become as popular as anticipated by many in the industry, it is still possible that the new system could contribute to a significant reduction in overall economy-wide emissions, providing a much needed silver lining to the problem of heavy traffic.

Image Credit – kla4067 via flickr.com on a Creative Commons license


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About the Author

is a writer and freelance journalist specialising in sustainability and green issues. He lives in Cardiff, Wales.



  • Doug

    This type of technology has interested me for awhile now. The thought of using traffic to generate clean electricity is awesome. This would allow for an electric grid for autos that would eliminate the need to recharge.

  • Doug

    This type of technology has interested me for awhile now. The thought of using traffic to generate clean electricity is awesome. This would allow for an electric grid for autos that would eliminate the need to recharge.

  • Doug

    This type of technology has interested me for awhile now. The thought of using traffic to generate clean electricity is awesome. This would allow for an electric grid for autos that would eliminate the need to recharge.

  • Dave

    Something for nothing? Not likely. However, it might provide energy useful in powering traffic lights and RF road guides*.

    *RF road guides could broadcast specific info (highway name and mile marker, distance to next exit and city/town, services available, etc.) about a given location using a low powered transmitter on a fixed radio frequency to cars currently passing over that stretch of roadway. They could even be incorporated into a “hands-free” cruise control that would guide your vehicle to a pre-selected exit. No traffic? No broadcast.

  • Dave

    Something for nothing? Not likely. However, it might provide energy useful in powering traffic lights and RF road guides*.

    *RF road guides could broadcast specific info (highway name and mile marker, distance to next exit and city/town, services available, etc.) about a given location using a low powered transmitter on a fixed radio frequency to cars currently passing over that stretch of roadway. They could even be incorporated into a “hands-free” cruise control that would guide your vehicle to a pre-selected exit. No traffic? No broadcast.

  • http://freesand.com/ Matt

    Some of the stats written in this post seem to imply that it’s possible to recover all of the energy used to drive an electric car down a stretch of road. That is impossible.

  • http://freesand.com/ Matt

    Some of the stats written in this post seem to imply that it’s possible to recover all of the energy used to drive an electric car down a stretch of road. That is impossible.

  • http://freesand.com/ Matt

    Some of the stats written in this post seem to imply that it’s possible to recover all of the energy used to drive an electric car down a stretch of road. That is impossible.

  • http://freesand.com/ Matt

    Some of the stats written in this post seem to imply that it’s possible to recover all of the energy used to drive an electric car down a stretch of road. That is impossible.

  • Mark

    It would actually be reducing everyone’s mileage a tiny bit, and converting that to a public use. Sort of a tax.

  • Mark

    It would actually be reducing everyone’s mileage a tiny bit, and converting that to a public use. Sort of a tax.

  • Mark

    It would actually be reducing everyone’s mileage a tiny bit, and converting that to a public use. Sort of a tax.

  • Mark

    It would actually be reducing everyone’s mileage a tiny bit, and converting that to a public use. Sort of a tax.

  • Mark

    It would actually be reducing everyone’s mileage a tiny bit, and converting that to a public use. Sort of a tax.

  • Adam

    Mark, that’s not necessarily the case. When a car drives on a surface, it pushes down on that surface (you can see the result, via Newton’s 3rd Law, in the deformation of tires). This happens no matter what. Putting piezoelectric crystals in the road surface is simply an attempt to extract useful energy from what would otherwise be wasted.

    As Matt and Dave have noted, the amount of energy recovered will be small. I also wonder about the practicality of actually extracting energy from this material (as I don’t know much about piezoelectricity). That all said, if it’s practical, I say go for it, as every little bit will help wean us from oil.

  • Adam

    Mark, that’s not necessarily the case. When a car drives on a surface, it pushes down on that surface (you can see the result, via Newton’s 3rd Law, in the deformation of tires). This happens no matter what. Putting piezoelectric crystals in the road surface is simply an attempt to extract useful energy from what would otherwise be wasted.

    As Matt and Dave have noted, the amount of energy recovered will be small. I also wonder about the practicality of actually extracting energy from this material (as I don’t know much about piezoelectricity). That all said, if it’s practical, I say go for it, as every little bit will help wean us from oil.

  • http://www.andersbekekenblog.nl Erik van Erne, Milieunet Found

    Here is some more interesting news on a sustainable highway

    http://www.stichtingmilieunet.nl/andersbekekenblog/?p=613

    • malleshwari.p

      this is an interesting topic but we need more information about this topis,can you send me that to my mail.

  • http://www.andersbekekenblog.nl Erik van Erne, Milieunet Foundation

    Here is some more interesting news on a sustainable highway

    http://www.stichtingmilieunet.nl/andersbekekenblog/?p=613

  • jpm100

    If they make the road more deformable in order yield more energy, then this would be added energy lost. Only if the road maintained exactly the same properties wrt to its deformation and interaction with the tires would it not steal energy.

    We may lose energy to the tires, but I’ve never heard anyone claim we lose significant energy to the road itself. Otherwise there would be movements to switch to hardened concrete.

  • jpm100

    If they make the road more deformable in order yield more energy, then this would be added energy lost. Only if the road maintained exactly the same properties wrt to its deformation and interaction with the tires would it not steal energy.

    We may lose energy to the tires, but I’ve never heard anyone claim we lose significant energy to the road itself. Otherwise there would be movements to switch to hardened concrete.

  • B. B.Bunting

    The idea of using the car to generate electricity means that the car is using more gas. A better way to get there is by following this system :

    Not only do present cars release greenhouse gases that cause some solar gains, but the dust from tires/roads, typically hydrocarbon and silica pollutants, remain in the lower atmosphere for indefinite periods. This gain of heat is unnecessary. The other health-related problems, of carcinogens and agricultural losses are also improved by Amcars. This system eliminates them as it is a WHEEL-LESS vehicle.

    Although the characters and the places described in the book are fictitious, Amcars is a serious engineering system, developed by an engineer and based on a number of successful patents, including those mentioned above.

    Taking the Linear Motor from its common use on the factory floor, Amcars offer a different practical use for it, as the ‘Guideway.’ A second patent from the 1920s, described as the ‘Merger,’ allows the wheel-less vehicles to glide smoothly from their course on one Guideway to another. An air cushion allows friction-free motion of the Amcars along their Guideways, after the manner of the Ford Motor Company’s research project of the 1950s. Their vehicle used a 15 horsepower fan but did not make use of electromagnetism to speed their vehicle on. Neither, more seriously, did Ford offer riders the ability to choose their path and destination, as Amcars does.

    Finally, with the developments in major solar power, of up to 6kWh/square meter/hour, from Photovoltaics of the end of the 20th Century, the whole system can be powered by renewable energy. Amcars requires no roads, very little carbon fuels and works best when the vehicles are not quickly obsolescent.

    * a long-time activist with an MS degree in Environmental Engineering, the author worked in the Aircraft Industry, the EPA, as an Engineering magazine editor and as a Consultant. has spent years noting the problems associated with cars, greenhouse effects and pollution world-wide. The manuscript published as The Power Play to end the car offers a mostly fictional, yet practical, solution to the most notable of those problems.

  • B. B.Bunting

    The idea of using the car to generate electricity means that the car is using more gas. A better way to get there is by following this system :

    Not only do present cars release greenhouse gases that cause some solar gains, but the dust from tires/roads, typically hydrocarbon and silica pollutants, remain in the lower atmosphere for indefinite periods. This gain of heat is unnecessary. The other health-related problems, of carcinogens and agricultural losses are also improved by Amcars. This system eliminates them as it is a WHEEL-LESS vehicle.

    Although the characters and the places described in the book are fictitious, Amcars is a serious engineering system, developed by an engineer and based on a number of successful patents, including those mentioned above.

    Taking the Linear Motor from its common use on the factory floor, Amcars offer a different practical use for it, as the ‘Guideway.’ A second patent from the 1920s, described as the ‘Merger,’ allows the wheel-less vehicles to glide smoothly from their course on one Guideway to another. An air cushion allows friction-free motion of the Amcars along their Guideways, after the manner of the Ford Motor Company’s research project of the 1950s. Their vehicle used a 15 horsepower fan but did not make use of electromagnetism to speed their vehicle on. Neither, more seriously, did Ford offer riders the ability to choose their path and destination, as Amcars does.

    Finally, with the developments in major solar power, of up to 6kWh/square meter/hour, from Photovoltaics of the end of the 20th Century, the whole system can be powered by renewable energy. Amcars requires no roads, very little carbon fuels and works best when the vehicles are not quickly obsolescent.

    * a long-time activist with an MS degree in Environmental Engineering, the author worked in the Aircraft Industry, the EPA, as an Engineering magazine editor and as a Consultant. has spent years noting the problems associated with cars, greenhouse effects and pollution world-wide. The manuscript published as The Power Play to end the car offers a mostly fictional, yet practical, solution to the most notable of those problems.

  • B. B.Bunting

    The idea of using the car to generate electricity means that the car is using more gas. A better way to get there is by following this system :

    Not only do present cars release greenhouse gases that cause some solar gains, but the dust from tires/roads, typically hydrocarbon and silica pollutants, remain in the lower atmosphere for indefinite periods. This gain of heat is unnecessary. The other health-related problems, of carcinogens and agricultural losses are also improved by Amcars. This system eliminates them as it is a WHEEL-LESS vehicle.

    Although the characters and the places described in the book are fictitious, Amcars is a serious engineering system, developed by an engineer and based on a number of successful patents, including those mentioned above.

    Taking the Linear Motor from its common use on the factory floor, Amcars offer a different practical use for it, as the ‘Guideway.’ A second patent from the 1920s, described as the ‘Merger,’ allows the wheel-less vehicles to glide smoothly from their course on one Guideway to another. An air cushion allows friction-free motion of the Amcars along their Guideways, after the manner of the Ford Motor Company’s research project of the 1950s. Their vehicle used a 15 horsepower fan but did not make use of electromagnetism to speed their vehicle on. Neither, more seriously, did Ford offer riders the ability to choose their path and destination, as Amcars does.

    Finally, with the developments in major solar power, of up to 6kWh/square meter/hour, from Photovoltaics of the end of the 20th Century, the whole system can be powered by renewable energy. Amcars requires no roads, very little carbon fuels and works best when the vehicles are not quickly obsolescent.

    * a long-time activist with an MS degree in Environmental Engineering, the author worked in the Aircraft Industry, the EPA, as an Engineering magazine editor and as a Consultant. has spent years noting the problems associated with cars, greenhouse effects and pollution world-wide. The manuscript published as The Power Play to end the car offers a mostly fictional, yet practical, solution to the most notable of those problems.

  • ChuckL

    An example of a piezo-electric generator is a cartridge for a phonograph which uses a non magnetic cartridge. These are essentially a crystal mounted so that it can be distorted in predictable ways. the distortion generates a small electric current. Compared to magnetic pickups, these are very high powered devices. some outputs exceed 1.0 volts.

    Because the deflection of the piezo-electric crystal to generate a current is considerable less than the deflection of the tire, I have severe doubts that there will be a measurable effect on the range of the electric car using this roadway. In effect this would be found free energy. The big question is the cost of building and maintaining the roadway to get this “FREE” energy.

  • ChuckL

    An example of a piezo-electric generator is a cartridge for a phonograph which uses a non magnetic cartridge. These are essentially a crystal mounted so that it can be distorted in predictable ways. the distortion generates a small electric current. Compared to magnetic pickups, these are very high powered devices. some outputs exceed 1.0 volts.

    Because the deflection of the piezo-electric crystal to generate a current is considerable less than the deflection of the tire, I have severe doubts that there will be a measurable effect on the range of the electric car using this roadway. In effect this would be found free energy. The big question is the cost of building and maintaining the roadway to get this “FREE” energy.

  • greendoughnuts

    @ Adam,

    You just fail freshman level physics. If you have a degree, it should be revoked.

    “There is much more free energy if you were to put a windmill on the back of your car. You could charge your car while you drive down the road.”

    This idea of harvesting energy from roads is just a moronic as the above logic. There is no such thing a free energy. It must come from some where. In this case your car will be slower after going over this stretch of road as compared to a normal surface. Because the road deforms, the car must lift itself out of these deformations as it rolls along. This energy will either slow the car down if it were just rolling along or consume more fuel to maintain its speed. There is no getting around the laws of thermodynamics.

  • greendoughnuts

    @ Adam,

    You just fail freshman level physics. If you have a degree, it should be revoked.

    “There is much more free energy if you were to put a windmill on the back of your car. You could charge your car while you drive down the road.”

    This idea of harvesting energy from roads is just a moronic as the above logic. There is no such thing a free energy. It must come from some where. In this case your car will be slower after going over this stretch of road as compared to a normal surface. Because the road deforms, the car must lift itself out of these deformations as it rolls along. This energy will either slow the car down if it were just rolling along or consume more fuel to maintain its speed. There is no getting around the laws of thermodynamics.

  • greendoughnuts

    @ Adam,

    You just fail freshman level physics. If you have a degree, it should be revoked.

    “There is much more free energy if you were to put a windmill on the back of your car. You could charge your car while you drive down the road.”

    This idea of harvesting energy from roads is just a moronic as the above logic. There is no such thing a free energy. It must come from some where. In this case your car will be slower after going over this stretch of road as compared to a normal surface. Because the road deforms, the car must lift itself out of these deformations as it rolls along. This energy will either slow the car down if it were just rolling along or consume more fuel to maintain its speed. There is no getting around the laws of thermodynamics.

  • greendoughnuts

    @ Adam,

    You just fail freshman level physics. If you have a degree, it should be revoked.

    “There is much more free energy if you were to put a windmill on the back of your car. You could charge your car while you drive down the road.”

    This idea of harvesting energy from roads is just a moronic as the above logic. There is no such thing a free energy. It must come from some where. In this case your car will be slower after going over this stretch of road as compared to a normal surface. Because the road deforms, the car must lift itself out of these deformations as it rolls along. This energy will either slow the car down if it were just rolling along or consume more fuel to maintain its speed. There is no getting around the laws of thermodynamics.

  • George Presley

    Mr. Greendoughnuts knows where true ground is.

    Simply put, walk on sand and then on hard ground. Do you feel the difference?

    From front-end to rear-end, even without the car in between doing push-up, you are talking about a gas driven piezo-electric generator. Try to market that item with efficiency as it’s main feature.

    Why do people think that adding extra conversions from input to output somehow reduces losses or creates gains? You gota be kid’n me.

    I went to “Hill Billy High School” and they learned me that much.

  • George Presley

    Mr. Greendoughnuts knows where true ground is.

    Simply put, walk on sand and then on hard ground. Do you feel the difference?

    From front-end to rear-end, even without the car in between doing push-up, you are talking about a gas driven piezo-electric generator. Try to market that item with efficiency as it’s main feature.

    Why do people think that adding extra conversions from input to output somehow reduces losses or creates gains? You gota be kid’n me.

    I went to “Hill Billy High School” and they learned me that much.

  • kamal gurgar

    it’s the starting of electriaffic(electric+traffic)generation.here the use of ultracapacitors may store high energy and will result in more efficient energy storage.

  • kamal gurgar

    it’s the starting of electriaffic(electric+traffic)generation.here the use of ultracapacitors may store high energy and will result in more efficient energy storage.

  • kamal gurgar

    it’s the starting of electriaffic(electric+traffic)generation.here the use of ultracapacitors may store high energy and will result in more efficient energy storage.

  • kamal gurgar

    it’s the starting of electriaffic(electric+traffic)generation.here the use of ultracapacitors may store high energy and will result in more efficient energy storage.

  • kamal gurgar

    it’s the starting of electriaffic(electric+traffic)generation.here the use of ultracapacitors may store high energy and will result in more efficient energy storage.

  • kamal gurgar

    installation of wind mill will not result in efficient generation and it will also increase the weight of car.

  • kamal gurgar

    installation of wind mill will not result in efficient generation and it will also increase the weight of car.

  • kamal gurgar

    here one interesting thing is that we can use solar energy instead of using wind energy becoz 2-3 solar panels will result in remarkable energy.

    mathematically speaking,a 38 watt solar panel can charge a 12 volt battery(40amp) within 2-3 hours.

  • kamal gurgar

    here one interesting thing is that we can use solar energy instead of using wind energy becoz 2-3 solar panels will result in remarkable energy.

    mathematically speaking,a 38 watt solar panel can charge a 12 volt battery(40amp) within 2-3 hours.

  • BrianT

    I always get tickled when I read about this subject.

    There is always someone that claims you have to Rob Peter to Pay Paul. I quote from above “This idea of harvesting energy from roads is just a moronic as the above logic. There is no such thing a free energy. It must come from some where.” Lets explore this. Yes this is a completely true statement. But, think about it in a simpler way. What goes up must come down. Call this “Parasitic Energy Harvesting” Taking advantage of something that is going to occur not matter what. Ok there is a hill in the hiway. Sure this hill is there it will always be there. So why not harvest the lost energy on the way down the hill. So the claim that the vehicle will use more energy to travel a road with piezoelectric generator in not true in the technical sense. We are harvesting the energy from gravity and or even inertia. Think of an elevator going to the top floor of the empire state building. We know it is going do this for the next 100 years. So why not capture the energy made on its way down.

    So to conclude yes under typical conditions the above person is correct in its rawest form. But did not take into consideration gravity, kinetics or inertia, and is missing the value of the project.

  • BrianT

    I always get tickled when I read about this subject.

    There is always someone that claims you have to Rob Peter to Pay Paul. I quote from above “This idea of harvesting energy from roads is just a moronic as the above logic. There is no such thing a free energy. It must come from some where.” Lets explore this. Yes this is a completely true statement. But, think about it in a simpler way. What goes up must come down. Call this “Parasitic Energy Harvesting” Taking advantage of something that is going to occur not matter what. Ok there is a hill in the hiway. Sure this hill is there it will always be there. So why not harvest the lost energy on the way down the hill. So the claim that the vehicle will use more energy to travel a road with piezoelectric generator in not true in the technical sense. We are harvesting the energy from gravity and or even inertia. Think of an elevator going to the top floor of the empire state building. We know it is going do this for the next 100 years. So why not capture the energy made on its way down.

    So to conclude yes under typical conditions the above person is correct in its rawest form. But did not take into consideration gravity, kinetics or inertia, and is missing the value of the project.

  • BrianT

    I always get tickled when I read about this subject.

    There is always someone that claims you have to Rob Peter to Pay Paul. I quote from above “This idea of harvesting energy from roads is just a moronic as the above logic. There is no such thing a free energy. It must come from some where.” Lets explore this. Yes this is a completely true statement. But, think about it in a simpler way. What goes up must come down. Call this “Parasitic Energy Harvesting” Taking advantage of something that is going to occur not matter what. Ok there is a hill in the hiway. Sure this hill is there it will always be there. So why not harvest the lost energy on the way down the hill. So the claim that the vehicle will use more energy to travel a road with piezoelectric generator in not true in the technical sense. We are harvesting the energy from gravity and or even inertia. Think of an elevator going to the top floor of the empire state building. We know it is going do this for the next 100 years. So why not capture the energy made on its way down.

    So to conclude yes under typical conditions the above person is correct in its rawest form. But did not take into consideration gravity, kinetics or inertia, and is missing the value of the project.

  • BrianT

    I always get tickled when I read about this subject.

    There is always someone that claims you have to Rob Peter to Pay Paul. I quote from above “This idea of harvesting energy from roads is just a moronic as the above logic. There is no such thing a free energy. It must come from some where.” Lets explore this. Yes this is a completely true statement. But, think about it in a simpler way. What goes up must come down. Call this “Parasitic Energy Harvesting” Taking advantage of something that is going to occur not matter what. Ok there is a hill in the hiway. Sure this hill is there it will always be there. So why not harvest the lost energy on the way down the hill. So the claim that the vehicle will use more energy to travel a road with piezoelectric generator in not true in the technical sense. We are harvesting the energy from gravity and or even inertia. Think of an elevator going to the top floor of the empire state building. We know it is going do this for the next 100 years. So why not capture the energy made on its way down.

    So to conclude yes under typical conditions the above person is correct in its rawest form. But did not take into consideration gravity, kinetics or inertia, and is missing the value of the project.

  • BrianT

    I always get tickled when I read about this subject.

    There is always someone that claims you have to Rob Peter to Pay Paul. I quote from above “This idea of harvesting energy from roads is just a moronic as the above logic. There is no such thing a free energy. It must come from some where.” Lets explore this. Yes this is a completely true statement. But, think about it in a simpler way. What goes up must come down. Call this “Parasitic Energy Harvesting” Taking advantage of something that is going to occur not matter what. Ok there is a hill in the hiway. Sure this hill is there it will always be there. So why not harvest the lost energy on the way down the hill. So the claim that the vehicle will use more energy to travel a road with piezoelectric generator in not true in the technical sense. We are harvesting the energy from gravity and or even inertia. Think of an elevator going to the top floor of the empire state building. We know it is going do this for the next 100 years. So why not capture the energy made on its way down.

    So to conclude yes under typical conditions the above person is correct in its rawest form. But did not take into consideration gravity, kinetics or inertia, and is missing the value of the project.

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  • manish

    how can u say that piezoeletric substance is more retarding than asphalt……they should be similar in beheaviour to the cars

  • manish

    how can u say that piezoeletric substance is more retarding than asphalt……they should be similar in beheaviour to the cars

  • manish

    how can u say that piezoeletric substance is more retarding than asphalt……they should be similar in beheaviour to the cars

  • manish

    how can u say that piezoeletric substance is more retarding than asphalt……they should be similar in beheaviour to the cars

  • manish

    how can u say that piezoeletric substance is more retarding than asphalt……they should be similar in beheaviour to the cars

  • manish

    how can u say that piezoeletric substance is more retarding than asphalt……they should be similar in beheaviour to the cars

  • abhishek tiwari

    i think the main drawback is its cost and maintainence on such large scale!but if able to reduce to cost factor then its such a divine step in energy reaserch!good job

  • abhishek tiwari

    i think the main drawback is its cost and maintainence on such large scale!but if able to reduce to cost factor then its such a divine step in energy reaserch!good job

  • Yirmi

    I’m doing my M.Sc. investigating piezoelectrics.

    I mainly agree with the statement that there is no free lunch. What brianT says that tthe cars are anyways driving is not totally true. As greendoughnuts says the road will be a bit deformed. The deformation will be very subtle and it is Very Important to make a calculation if the diformation is greater than a diformation is asphalt. I can tell you from knowing the crystal that it isn’t a soft ‘sand like’ or foam like crystal. It is very rigid.

    Another point which was mentioned is the maintnance.

    This might not be worth it.

    I agree that is makes more sense to just put a solar panel on each car.

  • Yirmi

    I’m doing my M.Sc. investigating piezoelectrics.

    I mainly agree with the statement that there is no free lunch. What brianT says that tthe cars are anyways driving is not totally true. As greendoughnuts says the road will be a bit deformed. The deformation will be very subtle and it is Very Important to make a calculation if the diformation is greater than a diformation is asphalt. I can tell you from knowing the crystal that it isn’t a soft ‘sand like’ or foam like crystal. It is very rigid.

    Another point which was mentioned is the maintnance.

    This might not be worth it.

    I agree that is makes more sense to just put a solar panel on each car.

  • Yirmi

    I’m doing my M.Sc. investigating piezoelectrics.

    I mainly agree with the statement that there is no free lunch. What brianT says that tthe cars are anyways driving is not totally true. As greendoughnuts says the road will be a bit deformed. The deformation will be very subtle and it is Very Important to make a calculation if the diformation is greater than a diformation is asphalt. I can tell you from knowing the crystal that it isn’t a soft ‘sand like’ or foam like crystal. It is very rigid.

    Another point which was mentioned is the maintnance.

    This might not be worth it.

    I agree that is makes more sense to just put a solar panel on each car.

  • Yirmi

    I’m doing my M.Sc. investigating piezoelectrics.

    I mainly agree with the statement that there is no free lunch. What brianT says that tthe cars are anyways driving is not totally true. As greendoughnuts says the road will be a bit deformed. The deformation will be very subtle and it is Very Important to make a calculation if the diformation is greater than a diformation is asphalt. I can tell you from knowing the crystal that it isn’t a soft ‘sand like’ or foam like crystal. It is very rigid.

    Another point which was mentioned is the maintnance.

    This might not be worth it.

    I agree that is makes more sense to just put a solar panel on each car.

  • Yirmi

    I’m doing my M.Sc. investigating piezoelectrics.

    I mainly agree with the statement that there is no free lunch. What brianT says that tthe cars are anyways driving is not totally true. As greendoughnuts says the road will be a bit deformed. The deformation will be very subtle and it is Very Important to make a calculation if the diformation is greater than a diformation is asphalt. I can tell you from knowing the crystal that it isn’t a soft ‘sand like’ or foam like crystal. It is very rigid.

    Another point which was mentioned is the maintnance.

    This might not be worth it.

    I agree that is makes more sense to just put a solar panel on each car.

  • Yirmi

    I’m doing my M.Sc. investigating piezoelectrics.

    I mainly agree with the statement that there is no free lunch. What brianT says that tthe cars are anyways driving is not totally true. As greendoughnuts says the road will be a bit deformed. The deformation will be very subtle and it is Very Important to make a calculation if the diformation is greater than a diformation is asphalt. I can tell you from knowing the crystal that it isn’t a soft ‘sand like’ or foam like crystal. It is very rigid.

    Another point which was mentioned is the maintnance.

    This might not be worth it.

    I agree that is makes more sense to just put a solar panel on each car.

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  • http://Web Dominique

    What’s the road additional price in regards of the cost of the produced electricity?
    What is the life time of the piezoelectric ceramic in regards to the wearing out of the road surface?
    What is the electricity production life time of these ceramics in such a context?

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