Jennifer Homendy speaks throughout a information convention on Oct. 3, 2019, in Windsor Locks, Conn. On Wednesday, Homendy, the chairwoman of the Nationwide Transportation Security Board, mentioned she is anxious in regards to the threat that heavy electrical automobiles pose in the event that they collide with lighter automobiles.

Chris Ehrmann/AP

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Chris Ehrmann/AP

Jennifer Homendy speaks throughout a information convention on Oct. 3, 2019, in Windsor Locks, Conn. On Wednesday, Homendy, the chairwoman of the Nationwide Transportation Security Board, mentioned she is anxious in regards to the threat that heavy electrical automobiles pose in the event that they collide with lighter automobiles.

Chris Ehrmann/AP

DETROIT — The pinnacle of the Nationwide Transportation Security Board expressed concern Wednesday in regards to the security dangers that heavy electrical automobiles pose in the event that they collide with lighter automobiles.

The official, Jennifer Homendy, raised the difficulty in a speech in Washington to the Transportation Analysis Board. She famous, by means of instance, that an electrical GMC Hummer weighs about 9,000 kilos (4,000 kilograms), with a battery pack that alone is 2,900 kilos (1,300 kilograms) — roughly your complete weight of a typical Honda Civic.

“I am involved in regards to the elevated threat of extreme harm and dying for all street customers from heavier curb weights and rising dimension, energy, and efficiency of automobiles on our roads, together with electrical automobiles,” Homendy mentioned in remarks ready for the group.

The additional weight that EVs usually carry stems from the outsize mass of their batteries. To realize 300 or extra miles (480 or extra kilometers) of vary per cost from an EV, batteries need to weigh 1000’s of kilos.

Some battery chemistries being developed have the potential to pack extra power into much less mass. However for now, there is a mismatch in weight between EVs and smaller inner combustion automobiles. EVs additionally ship on the spot energy to their wheels, making them speed up sooner most often than most gas-powered automobiles, vehicles and SUVs.

Homendy mentioned she was inspired by the Biden administration’s plans to section out carbon emissions from automobiles to take care of the local weather disaster. However she mentioned she nonetheless worries about security dangers ensuing from a proliferation of EVs on roads ands highways.

“We now have to watch out that we aren’t additionally creating unintended penalties: Extra dying on our roads,” she mentioned. “Security, particularly on the subject of new transportation insurance policies and new applied sciences, can’t be neglected.”

Homendy famous that Ford’s F-150 Lightning EV pickup is 2,000 to three,000 kilos (900 to 1,350 kilograms) heavier than the identical mannequin’s combustion model. The Mustang Mach E electrical SUV and the Volvo XC40 EV, she mentioned, are roughly 33% heavier than their gasoline counterparts.

“That has a major affect on security for all street customers,” Homendy added.

The NTSB investigates transportation crashes however has no authority to make laws. For automobiles, such authority rests largely with the Nationwide Freeway Site visitors Security Administration.

Even aside from EVs, the nation’s roads are crowded with heavy automobiles, due to a decadelong increase in gross sales of bigger automobiles, vehicles and SUVs that is led to excessive mismatches in collisions with smaller automobiles. However electrical automobiles are usually a lot heavier than even the biggest vehicles and SUVs which might be powered by gasoline or diesel.

Michael Brooks, government director of the nonprofit Middle for Auto Security, mentioned he, too, is anxious in regards to the weight of EVs as a result of consumers appear to be demanding a variety of 300 or extra miles per cost, requiring heavy batteries.

Establishing a charging community to accommodate which may be a mistake from a security perspective, Brooks mentioned.

“These greater, heavier batteries are going to trigger extra injury,” he mentioned. “It is a easy matter of mass and pace.”

Brooks mentioned he is aware of of little analysis performed on the security dangers of accelerating automobile weights. In 2011, the Nationwide Bureau of Financial Analysis revealed a paper that mentioned being hit by a automobile with an added 1,000 kilos will increase by 47% the likelihood of being killed in a crash.

He factors out that electrical automobiles have very excessive horsepower rankings, permitting them to speed up shortly even in crowded city areas. “Persons are not educated to deal with that kind of acceleration. It is simply not one thing that drivers are used to doing,” Brooks mentioned.

Additionally, many more moderen electrical SUVs are tall with restricted visibility that poses dangers to pedestrians or drivers of smaller automobiles, he mentioned.

Gross sales of latest electrical automobiles within the U.S. rose almost 65% final yr to 807,000 — about 5.8% of all new automobile gross sales. The Biden administration has set a aim of getting EVs attain 50% of latest automobile gross sales by 2030 and is providing tax credit of as much as $7,500 to get there. The consulting agency LMC Automotive has made a extra modest prediction: It expects EVs to make up one-third of the new-vehicle market by 2030.