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Soon to be tested in several cities in France, the Méduse radar is equipped with four microphones. Its goal ? Limit noise pollution.

Under study since the summer of 2019, the new Méduse radar will come into action this fall in eight French agglomerations. It will initially be a test phase before deploying its use and sanctioning in the course of 2022. But what is this new radar? While it does not affect the speed of motorized vehicles, it aims to reduce noise pollution.

Its purpose is to identify vehicles (cars, two-wheelers or three-wheelers) whose noise pollution exceeds the number of decibels authorized. The Méduse radar will be deployed this fall in eight cities in France: Paris, Rueil-Malmaison (Hauts-de-Seine), Saint-Lambert (Yvelines), Saint-Forget (Yvelines), Villeneuve-le-Roi (Val-de-Marne), Bron (metropolis of Lyon), Nice and Toulouse . Several sites have already tested the device for two years: Haute Vallée de Chevreuse, Villeneuve-le-Roi and Paris.

How does the Medusa radar work?

It is a multidirectional sound sensor. Installed at a height of 5 meters, the Medusa radar is equipped with a 360-degree camera and an acoustic antenna equipped with four microphones, arranged in a tetrahedron. Capable of picking up noise and determining its origin, it is equipped with an LAPI, an automatic number plate reading system. Once the offending device has been identified, the driver will automatically be fined and notified by mail.

No sanctions before 2022

For a few months, the Medusa device will be active only to validate its reliability and test its effectiveness. Time also to determine “a maximum decibel threshold will be determined and beyond which it will be considered that there is an abnormal noise”, indicates the organization Bruitparif. But the Medusa radar should begin its verbalizations in the course of the year 2022, even if no precise date has yet been given.

The aim is to sanction excessively noisy gear due to over-revving, excessive speed, unclamping, the use of an unapproved exhaust, modified or whose baffle has been removed on motorcycles “, indicates Fanny Mietlicki, director of Bruitparif, at Parisian. The organization has already successfully deployed some 70 Jellyfish over the past two years. These radars have helped to regulate noise pollution linked to nightlife in party areas as well as to assess the noise generated by large construction sites, in particular the construction sites of the Grand Paris Express.

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