How can cartography improve air quality?

Driven by its desire to reduce air polluting emissions, Bouygues Construction's Energy & Services Division has developed a digital tool to map and analyse its vehicle fleet in order to identify greening opportunities and prioritise investments in the short and medium term.

air quality
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In 2019, new transport policy legislation created low emission transport zones (ZFE-m). This system allows local authorities to restrict the circulation of certain categories of polluting vehicles on their territory. The restriction is based on the Crit’Air sticker system and on different conditions (scope, hours, types of vehicles). By the end of 2020, ten French cities have or will introduce ZFE-m: Aix-Marseille, Grand Paris, Grenoble, Lyon, Montpellier, Nice, Rouen, Strasbourg, Toulon, Toulouse. The climate bill stipulates that from 2025 onwards, the ZFE-m system will be extended to all urban areas with more than 150,000 inhabitants, i.e. 35 additional zones.

Innovative Solution 

Spatial analysis of our car fleet
Although the timescales for restrictions are still being defined for most of the ZFE-m, this system already identifies priority areas for de-polluting action. To target the fleet vehicles affected by these zones, a location-based decision-making tool was developed. The tool compares vehicle location with the existing m-ZFE-m in 2021, as well as to those expected for 2025. A perimeter of 50 km, i.e. the “major journey” limit, is defined around each ZFE-m to take building site trips into account. Result: 50% of vehicles are located within 50 km of an ZFE-m in 2021, and 59% in 2025. This inventory is the starting point to define specific greening plans for each ZFE-m. Greening efforts are prioritised according to the technologies available on the market, the use of vehicles and the investments required.


Key Figures

Maturity Level

Level 1: Proof of Concept
Level 2: Tested under real-life conditions

Level 3: Commercial solution

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