As electric vehicles (EVs) continue to gain popularity worldwide, with 22% of new car sales in 2024 being electric, a growing number of people are reporting increased motion sickness when riding in them. This phenomenon has sparked research into the scientific reasons behind why EVs might cause more carsickness than traditional combustion engine vehicles.
The Role of Familiarity
According to William Emond, a PhD student researching car sickness at the Université de Technologie de Belfort-Montbéliard in France, the brain’s lack of experience with EVs contributes significantly to the increased motion sickness. Since most people have more experience with combustion engine cars, their brains are better at anticipating the motion cues associated with these vehicles. In contrast, EVs operate more quietly and have different acceleration patterns, making it harder for the brain to predict the motion.
Key Factors Contributing to Motion Sickness in EVs
Research has identified several features common to EVs that may exacerbate motion sickness:
- Lack of Engine Noise: EVs are quieter than combustion engine cars, depriving passengers of auditory cues that help anticipate acceleration.
- Seat Vibrations: A 2024 study found a strong correlation between seat vibrations in EVs and the severity of motion sickness.
- Regenerative Braking: This technology, which converts kinetic energy into electricity, causes low-frequency deceleration. A 2024 study confirmed that higher levels of regenerative braking can induce more motion sickness.
Understanding Motion Sickness
Motion sickness occurs when there’s a mismatch between the sensory signals the brain receives about the body’s movement. The inner ear, eyes, and body send conflicting information to the brain, causing the discomfort associated with carsickness. Drivers are less likely to experience motion sickness because they can anticipate the vehicle’s movements.
Potential Solutions
As EV ownership grows, researchers are exploring ways to mitigate motion sickness. Suggestions include using visual signals like interactive screens and ambient lighting, or vibrational cues to help passengers anticipate motion changes. These solutions could be particularly relevant for autonomous EVs where passengers won’t be driving.
