Green lights ahead: Front brake lights could prevent accidents, scientists suggest

Scientists at Graz University of Technology in Austria have proposed an innovative safety measure: adding green brake lights to the front of vehicles. This concept aims to significantly enhance road safety, particularly at intersections, by providing earlier and clearer warnings to other road users.

Unlike conventional red brake lights that only alert drivers behind a vehicle, these proposed front-facing green lights would signal to pedestrians and oncoming vehicles that the car ahead is decelerating. Researchers believe this could prevent a substantial number of collisions. The lights are designed to be integrated seamlessly into vehicle designs and could also be retrofitted to existing cars relatively inexpensively.

Led by Ernst Tomaš from the Institute for Vehicle Safety, the research team reconstructed and simulated 200 real-world traffic accidents at Austrian intersections. Their simulations, which assumed the involved vehicles were equipped with these front green brake lights, indicated that between 7.5% and 17% of collisions could be avoided, depending on driver reaction times. Furthermore, in about a quarter of the simulated accidents, the additional lights would have reduced the impact speed, thereby lessening the severity of injuries.

The core benefit lies in shortening reaction times, which can be the critical factor differentiating a near-miss from an actual accident. However, the study, published in the journal Vehicles, also acknowledged limitations. In approximately one-third of the reconstructed accidents, the front brake lights were not visible due to unfavorable angles. To address this, the scientists recommend also placing brake lights on the sides of vehicles.

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Scientists recommend that brake lights also be placed on the sides of vehicles.