Developed by IFP Energies nouvelles (IFPEN), with the support of ADEME, Geco air is available for free on the iOS and Android stores.
Participate in the Geco air movement, reduce your impact to breathe cleaner air!

Atmospheric pollution, CO2 emissions … Each of us, can reduce its own polluting emissions (nitrogen oxide, fine particles, etc.) related to his/her trips: by adapting his/her driving style (more smooth) and favoring “sustainables” modes of transport (cycling, public transport). Geco air is here to accompany us in this process.

Why Geco air ?

Recently air pollution hits the headlines.
For now, debate is limited to the most polluting vehicle technologies such as gasoline fueled vehicles.
Geco air adds the eco-citizen axis and define our mobility behavior at the heart of the action!
This smartphone app helps us to reduce, on a daily basis, polluting emissions of our journeys by:
– Estimating the polluting emissions of all our trips, GECO Air is our mobility partner and informs us,
– Analyzing emissions of our journeys, whatever the type of transport (car, bicycle, public transport),
– Making us aware of the polluting nature of some of our trips with a “mobility score”, delivered each day and after each trip,
– Helping us improve our way of driving with simple, practical and personalized tips after each trip,
– Recommending us to choose soft transportation modes such as cycling when possible.

The benefits are real: by optimizing our driving style, emissions of our vehicle can be reduced by half!

And even with an old vehicle, we can all act together to improve the quality of the air!

How to use the app?

The application is available for free on the app stores. Test the application in demo mode, or set up your account in just a few clicks. Forget it then in your pocket; The application will analyze your trips in a completely automatic way. You only need to refer to your journal to see your results and receive tips to reduce your air quality impact.

How does it work?

GECO air takes into account all the vehicle characteristics (power, fuel, etc.) to generate a model for the pollutants calculation specific to each vehicle. Our algorithms automatically detect each of your trips and differentiate whether you are driving, cycling or walking. Your trips are then analyzed on our servers and polluting emissions are then estimated for each of them. For more details: detailed operation

A unique metrics, the mobility point

All pollutants are combined into a single, simple indicator, the mobility score. A mobility score is computed for each trip, taking into account local pollutant as well as green house gases and fuel consumption. By following his/her mobility score, the user will measure the polluting impact of each of his/her routes. For instance, taking a car for a short course will greatly decrease his/her mobility score of the day and encourage it, if it can, to choose wisely its transporation mode. At the end of each journey, the result is accompanied by simple and practical advice to improve the way of driving and thus contribute to improve air quality.

In order to reduce battery consumption and respect your privacy, the GPS is activated only when necessary (only during your car trips).

Geco air, a database to improve future urban developments

Geco air helps us to better understand air pollution at the local scale and thus helps to improve air quality estimate. Gecoair collects data on your trips And does not have commercial purpose. Funded by IFPEN, and Ademe, this initiative aims to fight against environmental degradation. The deployment of the application will collect significant data to feed our research. For example, we will be able to study pollution on a trip, on a particular route, through data from several drivers over several days. From there, we can release a map and point out areas of high particulate emissions and pollutants. These data can then be used to influence the structure of the road: to favor a 30km/h paved zone rather than a speed bump to avoid sudden drivers’ accelerations and thus a pollution peak … Simple ideas to start with but which could lead state departments, air quality agencies and municipalities to take action based on actual experience and real driving conditions based study. This is a citizen science campaign, enabling the citizen to participate in scientific projects that are based on real usage data.

To know more:  How does it work?

L’article What if you could act to improve air quality? est apparu en premier sur Geco air.

This article presents how works the GECO air application, from its installation to its daily use. It also explains the scientific approach used to estimate pollutants and answers the questions that the most skeptical might ask.

Download & setup

The app is available on the application stores for free, for iOS and Android. You can discover and test the application as a “demo” user but if you want to take advantage of all the features of the application,you can create your own account at any time.

A free application…

… without content?

Although free, GECO air is the result of extensive research work. The algorithms used are a direct application of IFPEN’s expertise in the field of engine, transport and software development. They have been the subject of a patent and several scientific publications..

… to collect my personal data ?

This application is not intended to collect personal data for commercial purposes. The only stored data are pollutant emission signals on your trips. These data are anonymized, stored and used by IFPEN researchers to improve road infrastructure and regulations in terms of impact on air quality.

Inquire your vehicle

Why ?

For the same route, the pollutants are not the same according to whether the driven vehicle is a recent hybrid one or an old diesel car. It is therefore necessary to take account of the technical characteristics of the vehicle used

How does it work ?

The user is asked to fill in his registration plate when the account is created. From this license plate it is possible to automatically retrieve all the technical specifications of the vehicle using a database provided by Argus to IFPEN . These specifications (fuel, year, cubic capacity, type of post-treatment, etc.) are used to parameterize the mathematical models which will allow to estimate the polluting emissions.

What precautions are taken for me?

Why is the license plate number necessary?

Vehicle emission levels are highly dependent on the vehicle’s specific characteristics. Our physical models take these data into account. However, it is not feasible to ask the user who in the vast majority of cases does not know this information or does not take the time to provide it.

Thanks to a partnership with Argus, we are able to know all these parameters only from the license plate.
Thus, the user just has to enter his licence plate number so that all our physical models are parameterized automatically. In addition to these technical data, no other information, and in particular the registration number, is stored.
However, if the user does not wish to enter his registration number, he can select a standard vehicle from a pre-entered vehicle list.
At the moment, only french users can benefit from this automatic tool but we are currently dealing with new database providers from other countries to propose this feature to more people.

Generating engine maps

Mobility detection  

In order to measure your footprint, GECO air automatically detects your daily movements.
The heart of the Geco Air application is the analysis of your car trips, in order to give you the means to improve your driving. However, even with the best possible driving, the use of a car is not always the best choice of mobility type (eg. for short route or heavily traffic jammed …). Therefore, we wanted to detect a greater number mobility types, in order to put into perspective the concrete emission levels linked to the displacements according to the choice of mobility type. Thus, beyond detecting and alerting the user on bad practices, GECO air makes it possible to measure the gain brought by mobility habits changes.
Our goal was to compute a daily “timeline” of the user in the most automatic way possible. Thus the user concentrates on the information that is returned to him and does not lose time manually to inform his movements. Thus, our algorithms alone detect the beginning and the end of each path, and record the data necessary for the estimation of the pollutants. They also detect the mobility type: walking, running, cycling, bus, car, train … We are actively working to improve this recognition. However, the current maturity of the technologies does not make it possible to reliably differentiate a journey by car from a trip by bus or train. The user can always manually modify the mobility type associated with each of his movements in order to correct his timeline.
To detect and identify physical activities (walking, running, cycling), GECO Air uses the inertial sensor and native smartphone APIs (CoreMotion for iOS)
These types of movement are thus not detected on smartphones which lacks theses sensors and APIs, in particular the iPad and tablets.

What precautions are taken for me?

• • Special precautions have been taken to make this feature consume as little battery as possible. The detection is based on the cellular antennas and the GPS of the phone. The use of the latter which is very energy-intensive, is not systematic. The potential start of a new path is firstly detected by the change of cellular antenna. The GPS is then activated from time to time to check whether the measured speed is typical of a car trip. If that condition is completed, then the GPS remains active during the movement to record the speed and the slope every second, which is the data essential to the estimation of the pollutants emitted. During the day, the GPS is only used as part of my car journeys, reducing the use of the battery.

• Send GPS signal : At each end of trip, the recorded data necessary for the estimation of pollutants are sent to our servers. If the smartphone does not have cell data at this time, the route is stored locally and reissued later. For a car trip,these data are the instantaneous speed and slope (at 1Hz), the GSP coordinates and the characteristics of the vehicle used.

 Why store this data on a server? Two reasons:

• • All the data and calculations are on the server, allowing to reduce the memory load of the application on the phone. This ensures the same computing performance regardless of the smartphone model.

• The collection of these data has a great scientific value: it allows to carry out on the scale of a territory studies on the real use of the vehicles and its impact on the pollutants. This point will be explained in detail later.
  All precautions are taken regarding the anonymity and security of the data stored on our servers.

 And my data plan?

Data exchanges are optimized to reduce data consumption. For example, for a typical application (two journeys per day, regular use of the application) data consumption does not exceed 5 MB per month.

Calculation of pollutants

The vehicle speed and altitude signals recorded by the GPS are sent at the end of the journey on the IFPEN servers. From these signals, the engine speed and torque are calculated using mathematical models taking into account the specificities of the vehicle (mass, type of gearbox). Using the engine speed and torque, the internal variables of the engine are calculated, such as fuel flow and exhaust temperature. These quantities are essential in order to estimate the polluting emissions. The algorithms for calculating the pollutant estimates developed by the IFPEN researchers were patented by the INPI.

Taking the driving style into account

The primary objective of GECO air is to measure the impact of the user’s behavior on the polluting emissions of his/her trips. For car trips, this means measuring and analyzing one’s driving style. To do this, GECO air relies on recording the speed of the vehicle at a frequency of 1 Hz by the GPS of the smartphone. This signal, filtered by our algorithms, allows us to calculate the instantaneous acceleration of the vehicle, characteristic element of the driving style. Thus, it is the actual use of the vehicle that is taken into account at every moment: level of acceleration, maintenance of speed, anticipation of braking …

Taking engine technologies into account

The mechanisms of formation of pollutants are highly dependent on the engine technologies used. The specificities of each vehicle (fuel type, injection system, type of aspiration, level of hybridization) are taken into account when choosing the mathematical equations that will be used to model the formation of pollutants. Once the formulation of the model is chosen, it is calibrated to the specifications of the vehicle (cylinder capacity, number of valve, power, torque, …). The models obtained are therefore much more accurate than average values of consumption or polluting emissions. Consequently, the consumption and emissions estimated by GECO air can be very different from those obtained during a normalized cycle. They correspond to the values observed in actual use.

Estimated Emissions of Nitrogen Oxides (NOx) from Diesel Engines

NOx emissions from diesel engines are one of the main pollutants responsible for the recent peaks in pollution. Their modeling in GECO air is based on an estimate of the rate of burned gases enclosed in the cylinder. Indeed, diesel engines use exhaust gas recirculation (EGR) in order to reduce their NOx emissions. However, this recirculation of the burnt gases is not at the same level over the entire driving field: if it can reach 30% of the mass of air admitted by the engine at low loaded operating points (low torque) Is often completely deactivated when we ask the engine a little more. As a result, depending on the driving style the emissions will vary significantly. The EGR setpoint mapping is a result of the calibration choices of engineers performing engine tuning. Consequently, GECO Air does not know the exact mapping of each vehicle but recalculates it, taking into account the calibration methods and the specificities of each vehicle, including: year, standard, mass, Route, scores on the approval cycle, the type of post-processing.
The most recent diesel vehicles are equipped with NOx after-treatment of the SCR or NOx trap type. These systems, located inside the exhaust line, carry out chemical reactions in order to reduce exhaust emissions. However, these post-treatment systems have very variable efficiencies depending on the use. Indeed during a cold start, these systems need an activation delay. On the other hand, they do not have the same performances over the entire motor field. These systems are therefore modeled in GECO air, which makes it possible to capture the impact of the use on NOx exhaust emissions.

Estimated carbon monoxide (CO) emissions from gasoline engines

The emissions of carbon monoxide from a petrol engine are closely linked to the richness of the engine. When the combustion is carried out under stoichiometric conditions (at wealth 1), the emissions are contained, and generally proportional to the fuel consumption. When the combustion is carried out in a rich mixture (richness greater than 1), the CO emissions increase strongly. The richness is thus the parameter of order 1 on the formation at the source of the carbon monoxide.
The carbon monoxide formed by the combustion is then treated by the oxidation catalysts fitted to the vast majority of gasoline vehicles (compulsory since 1993). This depollution system has an excellent efficiency, as long as it works with a richness 1 and is active, that is to say at a sufficient temperature. The two situations that will generate emissions of carbon monoxide in the atmosphere in significant quantities are start-up (and the first kilometers, which is why short trips must be avoided) and the operations in rich combustion.
In order to capture these phenomena, our models reproduce the rise in temperature of the aftertreatment system in order to determine its increase in efficiency over time as a function of the temperature and the exhaust flow rate.
They also reconstruct a richness of operation of the engine at every moment, taking into account the general rules of calibration of an engine. The enrichment of the combustion on the gasoline engines occurs at high load, that is to say generally around Of 75% of the maximum power, with a thermomechanical protection function of the motor. It is therefore clear that the level of CO emissions will be closely linked to the driving style: if the driver has a foot that is light enough to never exceed this threshold, his CO emissions will be very reduced. Only one model deported on each user as our allows to take into account this sensitivity.

Estimated emissions of carbon dioxide (CO2)

The first step in this model is to evaluate the internal physical quantities such as flow rates, temperatures, concentrations … for each one at the operating point of the engine field. These quantities will then be used to estimate fuel consumption, as well as pollutant emissions. These quantities are estimated on the basis of the following assumptions:

• The maximum torque curve and the architecture of the air loop are known to the engine;
• Generic friction law, engine speed function;
• Constant combustion indicated efficiency;
• The FARis equal to 1 in the petrol engine (except at high load when it increases linearly with the load) and varies between two values for the diesel engine.
• The EGR fraction (exhaust gas ratio) is known for each point on the engine board (determined as justified in the NOx section).

These assumptions are combined in the iterative algorithm presented on the above graph and applied for each point of the engine field to determine the mean effective pumping pressure (PMEP), to deduce the mean gross effective pressure fuel.
This iterative process, which is mainly aimed at calculating fuel consumption, also allows mapping of air mass flow, exhaust temperatures and the different pressures and temperatures in the air loop, Then necessary for the estimation of pollutants (training and post-treatment).
The equations used to determine fuel consumption, total intake mass flow and pressure and temperature conditions in the air path are detailed in an SAE publication [11] for EGR-free engines. These equations have been adapted to EGR engines to improve the estimation of the exhaust mass flow rate given to the emission model.

[11] G. Alix, J. Dabadie and G. Font, “An ICE Map Generation Tool Applied to the Evaluation of the Impact of Downsizing on Hybrid Vehicle Consumption,,” SAE Technical Paper, vol. 10.4271, no. 2015-24-2385, 2015.

The results of this algorithm were compared with results from tests carried out at the engine and vehicle bench at IFPEN:

The fuel consumption maps generated with this model showed good agreement with the measurement, as shown in the figure below, which shows an example of fuel consumption mapping generated for a turbo gasoline engine, Estimation in relation to the measurements.

Estimated Particulate Emissions from Diesel Engines

Les émissions de particules (PM2.5 et PM10) sont modélisées en deux étapes : on estime tout d’abord les émissions en sortie moteur puis on prend en compte l’impact du filtre à particule pour les véhicules qui en sont munis. Le modèle de particules en sortie moteur tient compte du niveau d’EGR (voir la section sur les NOx), du débit de carburant, du régime et de la richesse. Il se décompose en deux couches :
– un modèle quasi-statique, basé sur une adaptation des travaux
Le modèle de filtre à particule est basé sur une hypothèse d’une efficacité constante. L’impact des régénérations n’est à ce jour pas encore intégré.

Estimation des émissions de particules des moteurs essences

Historically, the most popular gasoline engines used an indirect injection system, ensuring good mixing of air and fuel, which allows for very low particulate emissions. However, the recent emergence of direct injection engines leads to very high particle levels comparable to those of diesel engines. This is a critical point because most gasoline engines are not equipped with a particle filter.
The particle formation mechanisms of petrol engines are very different from those of diesel engines and the use of a specific mathematical model has been needed to estimate Particulate Number (PN).

And fuel consumption?

The fuel consumption of a vehicle is directly proportional to its carbon dioxide emissions. For a petrol vehicle, a consumption of one liter per hundred kilometers is equivalent to CO2 emissions of 23g / km. For a diesel vehicle, because of a different composition of diesel, 1L / 100km is equivalent to 26g / km of CO2.
As a result, fuel consumption is taken into account in GECO air, even if it does not appear directly in the application.
Improving the mobility score also means reducing fuel consumption

How does GECO air take into account gear ratio engaged?
The gear ratio is calculated as a function of speed and acceleration.
Does it work well?
Yes for “normal” use of the gearbox. Not for those who stay first at 50km / h …

The Mobility Score

Goal:  A UNIQUE indicator: the Mobility Score. No need to be an expert: I follow the advices to maximize my mobility score.

How does it work ?

GECO air estimates pollutants related to each of my trips.

This includes in particular nitrogen oxides (NOx), nitrogen monoxide (CO), fine particulate matter (PM), unburnt hydrocarbons (HC) for which specific models are in place. Other unregulated pollutants (SO2, NMVOC) are also taken into account, although no specific models have yet been established due to lack of data. A standard level of emissions is taken into account according to the state of the art (emission factor COPERT). CO2, although not a polluting gas per se, but a greenhouse gas, is also estimated.
However, it is impossible to communicate independently on each of these pollutants in a consumer smartphone application.
First of all, these magnitudes remain very unknown to the general public.
Secondly, changes in the different pollutants are sometimes antagonistic: a driving style can minimize NOx emissions to the detriment of particles or vice versa. It would then be impossible to provide coherent advice to the user by seeking to independently reduce each pollutant. It would also be very difficult for him to follow his progress.
For these reasons, all the pollutants have been aggregated into a single indicator: the mobility score. This unit is homogeneous to grams of pollutants per kilometer.
The calculation formula is independent of the type of vehicle, and therefore particularly the type of fuel. It therefore allows an objective comparison of the emission levels of each vehicle.

.

Advices on my driving behavior

Pollutant emissions are linked to three factors: my vehicle, my journey and my driving style. GECO Air decomposes the impact of these three factors.
The part of my vehicle: these are the emissions of my vehicle if I adopt an exemplary driving, on a reference path
The part of the journey: even if my driving is ideal, certain types of path generate more pollutants: for example, a short journey or a heavily bottled route.
The part of my conduct is the part which I could have avoided by adopting simple reflexes. Advice is given me to reduce this share.
Advice :
The anticipation
Acceleration
The maximum speed
A follow-up over time that helps me measure my progress
Detection of regular trips: specific feedback to measure my progress on my current routes
How is the part of my driving style calculated?
To evaluate the driving style’s effectiveness, the emissions obtained on a course are compared with those generated on the same course with a reference driving style: limited acceleration, maximum speed on a restricted motorway, good anticipation and maintenance of speed.
On each route, the driving style tab of the application shows the share of emissions that could have been directly avoided by adopting this style of driving, and gives advice on how to do this.
My driving score (between 0 and 4) is directly related to this share of emissions that could have been avoided: I have doubled my emissions because of my driving style, it is a zero; I issued less than 10% in addition to the target, it’s a 4!
What precautions are taken for me?

• • No advice in real time, keep focus on the road!

• General advice? Here, the tips are practical, personalized and encrypted, they depend directly on the behavior you have just had

L’article How does it work? est apparu en premier sur Geco air.

L’article Air quality : a key issue est apparu en premier sur Geco air.

L’article Who are we? est apparu en premier sur Geco air.

Diesel vehicles are often perceived as the only ones responsible for the emission of fine particles, which is false. Not only are new petrol direct injection vehicles also concerned, but all vehicles, regardless of their propulsion system, emit fine particles due to abrasion of tires and brakes. Geco air improves to account for it.

Fine particles in the exhaust

Of course, diesel vehicles are historically not white as snow. Combustion in diesel engines naturally produces more particles than in their petrol equivalents. Old-generation diesel vehicles emitted large quantities of exhaust particles. But the introduction of particle filter technology from the 2000s and its widespread use in 2009 has drastically reduced particle emissions from these same diesel vehicles.
On the other hand, while gasoline vehicles have traditionally been very low particle emitters, the introduction of direct fuel injection (GDI) technologies to reduce fuel consumption has changed the game. These vehicles emit large amounts of fine particles, especially in cold weather and during strong acceleration. Like diesel, technologies exist to reduce these levels of emissions, starting with the particulate filter (GPF). But the late introduction of standards on particle species has not forced its generalization on the first generations of engine GDI.

Which vehicles are concerned?

In 2016, gasoline direct injection vehicles accounted for 43% of gasoline vehicle sales in Europe and are growing significantly. They are almost universal on the gasoline ranges of premium manufacturers. The general public will distinguish them by various names for each manufacturer: FSI, TFSI, TSI, IDE, THP, PureTech, GCI, GDI, GTE, Ecoboost, SCTi, Skyactiv-G, TCe, Drive-E, GTDi, TBi, Turbojet etc.

What does the standard say?

Up to Euro 4, the European standard only specified a limitation of the particle mass, and therefore did not prioritize the elimination of fine or very fine particles. This is why the Euro 5 standard has introduced a limitation of the number of particles emitted for diesel vehicles, in addition to the mass limit. The Euro 6b standard has extended this limitation to petrol engines, which will mainly affect two-stroke small-displacement engines and direct injection petrol engines, however allowing direct injection petrol cars to emit 6 ×10¹² fine particles 2017 while Euro 5 diesel cars are limited to 6×10¹¹ since 2011.

What are the orders of magnitude?

Technologies to reduce these emissions include the particulate filter for gasoline engine (GPF), as well as the optimization of injection systems and the shape of combustion chambers. These solutions exist today and are deployed more and more widely on the latest generation GDI engines to pass the standards. Particulate emissions are then much better contained, well below 6×10¹¹regulations.

What does Geco air do?

Geco air now incorporates a particle emission model for GDI gasoline vehicles. These emissions are taken into account when calculating POPs for each of your trips. For example, on an urban commute with a driving style corresponding to the average user of Geco air, taking into account petrol particles will increase your balance sheet by around 10 POPs. This value will double easily if you adopt a more nervous driving.

Emissions out of exhaust: same (bad) report for all vehicles

The abrasion of tires, brakes and the road generates emissions of fine particles.

Which vehicles are concerned?

All vehicles are concerned. And yes, even an electric vehicle emits fine particles, even if the brakes, less stressed thanks to energy recovery when braking, emit less particles compared to a conventional vehicle.

What are the orders of magnitude?

Particulate matter (PM10) emissions from a particular vehicle related to tire, brake and road abrasions are in the range of 10 to 40 mg per kilometer traveled. These levels are far from negligible, beyond the exhaust emission levels of recent gasoline vehicles like Diesel. In 2015, the Air Quality Observatory in Paris area estimated that 41% of suspended fine particles emitted by Parisian road traffic originated from this polluting source.

Of course, these levels depend on many factors: vehicle characteristics (mass, tire pressures, etc.), road profile (sinuosity, slope, slope), driving style (braking intensity and acceleration, cornering speed) , ambient conditions (temperature, rain, snow, etc.) or the type of road surface. The experienced driver can easily hear that the service life of his tires and brake pads depends strongly on his driving style: the same is true for the fine particles caused by this wear!

What does Geco air do?

Geco air now includes fine particle emissions related to abrasion of tires and platelets in the calculation of the environmental footprint of each trip. In order to fully take into account the sensitivity of these emissions to driving conditions, a dynamic model of the vehicle has been developed, taking into account the specificities of each vehicle (mass, center of gravity, tire size, etc.). Based on the speed, slope and heading information provided by GPS each second, this model estimates the forces applied to each wheel of the vehicle, in order to determine, second after second, component wear and emissions. fine particles that result.

These particle emissions are then taken into account in calculating POPs for each of your trips. An average exhaust emission level of 30 mg / km will correspond to a contribution of 15 POPs on the environmental balance of your trip. Depending on the driving style (braking and sudden acceleration, level of anticipation …), these levels will vary from single to double!

Another phenomenon responsible for pollution peaks: the re-suspension

This problem is particularly present in the Nordic countries. Quantities of particles due to abrasion of brakes, tires, and the road, but also to engine emissions and still to winter salting are stored in layers of ice or wet pavement. In spring, the roads dry up and release these accumulated particles throughout the winter. They are then re-suspended by the passage of vehicles, generating episodes of pollution peaks to large fine particles. This phenomenon, which is global at the city level, is very much linked to weather conditions and little to driver behavior, is not taken into account in Geco air.

To go further:

L’article All vehicles pollute est apparu en premier sur Geco air.

How can I act?

You can change your driving behavior by following the personnalized advices of the application
Choose your mode of transport: it is sometimes desirable to substitute the car with another mode of mobility: public transport, bicycle, walking
Choosing your vehicle: The environmental impact varies greatly from one vehicle to another. However, it is impossible to ask everyone to buy the latest hybrid vehicle.
The application provides advice on these three levers of action in a simple, transparent and non-stigmatizing way. At a glance, it helps to know if your choice of means of transport is appropriate, whether your vehicle is very polluting or not, and the application gives personalized advice to improve your driving style and reduce emissions.

L’article An app to act est apparu en premier sur Geco air.

The Geco air app is made available free of charge by IFPEN, a French public research establishment, as part of its general interest mission.

It has two objectives:
– advise drivers to help reduce the environmental impact of their driving
– conduct a crowdsensing campaign to help communities and cities to understand and reduce the polluting impact of road infrastructure (example: monitor the impact of a retarder on a road in terms of polluting emissions).

For these purposes the application collects, with the prior authorization of the user, the data of his GPS, only during his travels. Its data make it possible to calculate for each route its emissions from its real profile of speed, acceleration and altitude. Emissions profiles, anonymized, are also aggregated on each road segment in order to build a dynamic map of vehicle emissions and help cities identify critical areas. If a user wants to have a more accurate estimate of their emissions, the application gives them the opportunity to enter their registration number. This information is only used to collect the technical specifications of its vehicle (power, displacement, mass, …), it is not stored on the IFPEN servers.

All the data collected by the application is stored on the IFPEN servers and this data is not shared with any third party.

L’article Privacy policy est apparu en premier sur Geco air.