Empowering Pedestrian Safety: The Acoustic Vehicle Alerting System (AVAS)

In this blog post, we will explore what AVAS is, why it has emerged, how it works, and which vehicles require this system.
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As the rapid growth and adoption of electric vehicles (EVs) continue, a crucial concern has emerged: the silent operation of these vehicles poses a potential safety hazard for pedestrians and other road users. To address this issue, the Acoustic Vehicle Alerting System (AVAS) has been introduced.

What is Acoustic Vehicle Alerting System?

AVAS, or Acoustic Vehicle Alerting System, is an audible warning system designed to make electric and hybrid vehicles more noticeable in order to enhance safety for pedestrians and other road users. By emitting sound during low-speed maneuvers, AVAS helps mitigate the risks associated with silent vehicles.

Why AVAS Emerged?

The emergence of AVAS stems from the quiet nature of electric vehicles. While the quiet operation is a desirable feature for EV owners, it poses a significant safety concern. Pedestrians, particularly those with visual impairments, rely heavily on auditory cues to detect approaching vehicles. The lack of sound from electric vehicles increases the chances of accidents and collisions. AVAS aims to address this issue and create a safer road environment.

How Does AVAS Work?

AVAS operates by producing artificial sound that simulates the noise of a conventional internal combustion engine. The system is activated when the vehicle’s speed falls below a certain threshold. In Europe, regulations require AVAS to emit sound when the vehicle is traveling at speeds below 20 km/h, while in the United States, the threshold is set at speeds below 30 km/h. The sound produced is specifically designed to be easily distinguishable from other environmental noises, ensuring effective alertness without causing unnecessary noise pollution.

What Kind of Vehicles Requiring AVAS?

AVAS is not limited to private cars alone. In fact, its implementation extends to various vehicle categories. In addition to private electric vehicles, AVAS is mandatory for hybrids, plug-in hybrids, and fuel cell cars. This inclusion encompasses not only personal transportation but also commercial vehicles used for passenger and cargo transportation. By requiring AVAS in a wide range of vehicles, authorities aim to enhance the safety of all road users.


AVAS plays a crucial role in mitigating the risks associated with the silent operation of electric and hybrid vehicles. By emitting sound at low speeds, AVAS ensures that pedestrians and other road users can detect approaching vehicles, thereby reducing the likelihood of accidents.

Kepo Electronics AVAS Solutions

Kepo Electronics is a leading company in this field offering a range of AVAS products to contribute to this vital technology. Visit our dedicated AVAS product page to learn more about our AVAS solutions:


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