Enthusiasts Peak fine particle pollution: differentiated traffic, speed limits… all measures

12:40  03 march  2021
12:40  03 march  2021 Source:   nouvelobs.com

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  Pic de pollution aux particules fines : circulation différenciée, limitations de vitesse… toutes les mesures © Copyright 2021, L'Obs

A fine particle air pollution alert was triggered on Tuesday March 2 in the North, the Pas-de-Calais, the Oise and the Somme, causing speed limits on the roads.

This pollution also affects the Ile-de-France region, where the Paris police prefect has announced comparable measures, including an alternating traffic system. "The Obs" takes stock.

Speed ​​limits in 4 departments

The regulatory level of PM10 particles (with a diameter of 10 microns or less) "could be exceeded today and tomorrow. Therefore, the level of alert on persistence is triggered for these departments, "said the prefect of the northern defense and security zone in a statement.

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Since Tuesday 6 p.m., and for the entire day of this Wednesday, speed limits have been lowered in these departments by 20 km / h on all axes where motorists can usually travel at 90 km / h or more. On axes where the speed is normally limited to 80 km / h, it is lowered to 70 km / h.

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In the agricultural sector, the prefect recommends postponing the spreading of fertilizers "if possible".

Open-air burning of green waste is also prohibited and the prefecture asks individuals and communities to postpone work carried out with non-electric tools (mowers, hedge trimmers, etc.) or products based on organic solvents.

Differentiated traffic in Ile-de-France

The Paris police prefect has decided to set up differentiated traffic in Ile-de-France from this Wednesday March 3 until the end of the episode of fine particle pollution affecting the region, the prefecture announced on Tuesday. Differentiated traffic will be implemented "within the perimeter delimited by the A86 (excluding the latter)", the prefecture said in a statement.

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In this area, "only vehicles with a class 0, 1 and 2 Crit'Air sticker will be allowed to circulate" between 5:30 am and midnight . Maximum speeds will also be reduced by 20 km / h, dropping to 110, 90 or 70 km / h, depending on the road axes.

The current episode of fine particle pollution (PM10) is linked to "wood heating, road traffic and an import of Saharan sand", adds the prefecture. "The weather conditions do not allow effective dispersion of pollutants," she continues.

Airparif, which monitors air quality in Ile-de-France, forecasts a level of PM10 particle concentration between 50 and 65 µg / m3, ie an exceeding of the “information and recommendation” threshold, set at 50 µg / m3.

The prefecture also recommends “limiting as far as possible” travel by car, favoring teleworking, and, “if necessary”, to practice carpooling “while respecting barrier gestures”.

Other restrictive measures are taken, in particular the ban on individual wood heating. The prefecture specifies that it will put in place controls to ensure compliance with these measures.

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