Yes, but only by a headline number. A widely cited UK study found EVs put 2.24 times more stress on roads than petrol cars.
What that headline skips is the formula engineers actually use to design roads. Doubling a vehicle’s axle weight does not double the damage. It multiplies it by sixteen. Run the real numbers through that formula, and a heavy EV’s extra weight looks like rounding error next to one loaded truck.
Here is the arithmetic, so you can check it yourself.
Where the 2.24x number comes from
The study behind the headline
In 2024, the UK’s Asphalt Industry Alliance compared 15 popular EVs against their petrol equivalents. The electric versions averaged 312 kilograms heavier, about four adult passengers riding in the boot the whole trip.
Run that weight gap through a standard pavement stress formula and you get the 2.24x figure that first went viral through coverage like this. Larger EVs came in at 2.32x.
Nobody disputes the weight gap itself. A battery pack is genuinely heavy, 400 to 600 kilograms of cells, casing and cooling hardware sitting where a fuel tank and exhaust used to be. Removing the engine and gearbox saves some of that back, not nearly enough.
University of Tennessee civil engineering professor Kevin Heaslip has measured EVs running 30 percent heavier than comparable petrol cars. The widest real-world gap in this research was the Ford F-150 Lightning at 6,015 lb against 4,060 lb for the petrol F-150, a 48 percent jump on America’s best-selling vehicle.
At EVUnlock, we cross-check specifications against official manufacturer documentation before publishing.
Why “how much heavier” is the wrong question
Road damage does not scale with total vehicle weight. It scales with weight per axle, raised to the fourth power. That single distinction changes the whole story.
Picture two vehicles on the same road. A two-tonne SUV spreads its weight across two axles, about one tonne each. A loaded five-axle, 50-tonne truck carries roughly ten tonnes per axle, ten times the SUV’s load.
Feed that ten-times gap into the fourth power relationship, 10 × 10 × 10 × 10, and you get 10,000. One truck does roughly ten thousand times more damage per pass than the SUV. Not ten times. Ten thousand.
This is not a guess. It comes from the AASHO Road Test, run in Illinois between 1958 and 1960, where engineers built over 200 test road sections and drove trucks over them thousands of times. The fourth-power relationship that came out of it still shapes highway design worldwide.
The actual math on a heavy EV
Take the heaviest production Tesla’s rear axle, roughly 1,524 kg. Compare it against a legal Californian truck axle, capped at 9,021 kg.
1,524 ÷ 9,021 = 0.169. Raise that to the fourth power and you land at roughly 0.0008.
Flip that fraction over, and it tells you how many times the Tesla would need to cross the same spot to match one pass of that truck axle. The answer, in one public breakdown of the physics, is a little over 1,250 times.
One truck, once, equals well over a thousand trips by the heaviest EV on sale. A 20 to 30 percent weight bump on a passenger car is a small slice of a number that was already close to nothing.
| Comparison | The numbers | What it means |
|---|---|---|
| Petrol car vs typical EV | 10–30% heavier | Within the range engineers treat as noise |
| Petrol F-150 vs F-150 Lightning | 4,060 lb vs 6,015 lb (+48%) | Still nowhere near truck axle weight |
| Heaviest EV axle vs legal truck axle | 1,524 kg vs 9,021 kg (6x) | ~1,255x more damage per truck pass |
| 30% truck axle overload | Common on Indian highways | Triples damage; 10-year road lasts 3.5 |
| 50% truck axle overload | Also common | 5x damage; same road lasts 2 years |
What actually cracks the roads
India’s real problem has nothing to do with EVs
Want to see the fourth power law doing real damage? Look at Indian highways, not passenger cars.
India permits axle loads up to 10.2 tonnes. Most roads were built for 8.16 tonnes. That mismatch exists before a single truck breaks the rules, and most trucks break the rules anyway.
Central Road Research Institute surveys have measured Vehicle Damage Factors of 4 to 8 on Indian highways. A study of NH11 near Jaipur found a 30 percent axle overload triples pavement damage, cutting a 10-year road’s life to about 3.5 years. Push that to 50 percent, and the same road survives barely 2 years.
Set an electric Tata Nexon or Mahindra XUV400 next to that. Its few hundred extra kilograms sit nowhere near the threshold where the fourth power law starts multiplying damage. The trucks running half again over their legal limit are doing the damage, every day, and were doing it long before any of these cars had a battery. Our breakdown of India’s EV manufacturers covers who builds these cars.
The one honest exception: electric buses and trucks
Passenger EVs sit far below the axle weights where the fourth power law bites. Commercial vehicles do not.
An electric bus or truck adds battery mass on top of a chassis already near its legal axle limit, right where the fourth power relationship stops being trivial.
A 2025 pavement study on heavy battery EVs found that battery placement alone can shift fatigue damage by up to 200 percent versus an equivalent diesel truck, depending on which axle carries the extra weight. Steering axle placement is worst. Rear dual-tyre placement barely registers.
This is a real, specific question worth watching as India electrifies its bus fleets. It has nothing to do with your neighbour’s electric hatchback.
Even the fourth power law isn’t gospel
The most useful thing found while researching this piece wasn’t a defence of EVs. It was a challenge to the law itself.
A December 2025 CleanTechnica analysis found that a frost heave event damaged the original AASHO test track mid-experiment, and that damage got folded into the truck-wear data anyway. Modern engineers increasingly treat the fourth power relationship as an approximation, not a precise law, since real wear also depends on tyre design, suspension and existing road condition.
That doesn’t rescue the “EVs are destroying our roads” argument. If anything it weakens it further. It does mean everyone citing this law, this article included, should say “roughly” and mean it.
Two things about EV weight that are actually worth worrying about
Pavement isn’t the real story. Two other things are, and they deserve their own attention.
Collision safety. University of Nebraska crash tests found heavier EVs generate 20 to 50 percent more impact energy than a comparable petrol car. Standard guardrails were never built to stop a 7,000-lb Rivian at 60 mph. Separate research from the National Bureau of Economic Research found a 1,000-lb heavier vehicle raises the other driver’s fatality risk by 47 percent.
Who pays for roads. Fuel taxes fund a large share of road budgets, and EV owners pay none of it at the pump. That’s a real funding gap, and it’s a tax policy question, not an engineering one, which is exactly why several US states now charge flat annual EV fees instead.
Frequently Asked Questions
Do EVs cause more road damage than petrol cars?
Slightly more per vehicle in theory, not in any way that shows up in a road’s actual lifespan. EVs run 10 to 30 percent heavier, and the fourth power law means that gap sits well inside the range engineers already treat as noise next to truck traffic.
What is the fourth power law?
The finding, from the 1958–60 AASHO Road Test, that pavement damage rises with axle weight to the fourth power, not total vehicle weight. Doubling axle load multiplies damage roughly sixteen times, which is why trucks cause nearly all load-related road wear.
How many times more damage does a truck cause than an EV?
Roughly 1,255 times per pass, using the heaviest production EV’s axle against a legal truck axle. That comes from the same fourth power formula pavement engineers use for highway design.
Is the 2.24x EV road damage study real?
The weight comparison is real: 15 EVs averaged 312 kg heavier than their petrol equivalents, producing a calculated 2.24x pavement stress figure. What gets left out when the story spreads is that this is still tiny next to truck-caused damage under the same formula.
Do electric buses and trucks damage roads more than diesel ones?
This is the genuine exception. Commercial vehicles already run near the axle weights where the fourth power law has real teeth. A 2025 study found battery placement alone can swing damage by up to 200 percent.
Are Indian highways at risk from heavier electric SUVs?
Not meaningfully. Indian highways already show Vehicle Damage Factors of 4 to 8, driven by trucks running 30 to 50 percent over their legal axle limit, cutting road life from 10 years to as little as 2. A few hundred kg of EV battery doesn’t compete with that.
Should EV owners pay more road tax because of weight?
The road-wear evidence doesn’t support it. A separate, valid argument exists around EVs skipping fuel taxes that fund road maintenance, which is a tax-funding question, not a road-wear one.
Does EV weight make crashes more dangerous?
Yes, and it’s a separate issue from road damage. Heavier EVs generate 20 to 50 percent more impact energy in crash tests, and a 1,000-lb heavier vehicle raises the other driver’s fatality risk by 47 percent.
Is the fourth power law scientifically solid?
Useful but imperfect. It traces to a single 1950s test where frost heave damage got folded into the truck data, and engineers now treat it as an approximation. Even so, nothing in current research treats passenger EV weight as a serious road damage factor.
Should I avoid a heavy electric SUV because of road damage?
No. Under the same formula used to design highways, a passenger EV’s road damage is negligible next to truck traffic. Kerb weight matters for tyre wear and handling, not for public roads.
EVs do weigh more. That’s not in dispute. What’s missing from almost every viral version of this story is the fourth power law, and once you run the numbers, a passenger EV’s extra weight looks like rounding error next to an overloaded truck. Our electric cars section and EV buying guides cover what actually matters when choosing one.
Gagandeep Singh
Founder, EV UnlockGagandeep Singh is an Electronics and Communication Engineering graduate from BGIET Sangrur and holds an M.Tech in eMobility from IIT Madras (CODE IITM). He is the founder of EV Unlock, an independent electric vehicle research platform. His work combines engineering knowledge, SEO strategy and electric mobility research to deliver verified EV specifications, buying guides and charging information that help buyers make confident, informed decisions.