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Measuring the emissions of trucks and buses

The Dutch government is committed to reducing the fuel consumption of trucks and buses, as well as their pollutant emissions. In order to obtain objective data, TNO has been commissioned by the Ministry of Infrastructure and the Environment to measure road vehicle emissions and fuel consumption.

The random inspection programme serves a number of different purposes

Trucks and buses emit substances that can be harmful to health at the local level. The most notorious of these are particulate matter and oxides of nitrogen (NOx). Trucks and buses also emit CO2. CO2 is a greenhouse gas that contributes to global warming.

Thanks to the European Euro VI emission standards, trucks and buses are emitting fewer and fewer harmful substances.

In the context of its in-service testing programme, TNO checks whether trucks and buses that are currently in use in the Netherlands meet the European requirements on exhaust gas emissions. These measurements also give an insight into the real-world emissions of vehicles of the Dutch vehicle fleet.

European emission standards must be improved to make sure trucks will be clean under all real-world conditions. In order to do so, proper understanding of real-world emissions is vital. Moreover, insight into real-world emissions serves to support national policies for improving air quality.

Finally, TNO brings the knowledge it has gained to bear in the context of several national and international working groups that are involved in determining emission factors. The emission factors are used as input data for air quality models and air quality calculations. In the Netherlands, this data is submitted to the Task Force on Traffic and Transportation, while at international level it is submitted to ERMES (European Research for Mobile Emission Sources) and EURISEC (European In-Service Emission Conformity).

Testing with representative vehicles

Each year, in consultation with the Ministry, TNO selects several types of trucks and buses for testing. This group of vehicles, which is selected on the basis of RDW registration details, is a good reflection of the Dutch fleet.
For the purposes of real-world measurements, TNO regularly calls on Dutch truck and bus owners to make their vehicles available. In addition, the Ministry offers free tests to concession providers and large fleet owners who are about to purchase Euro VI vehicles, for example. In their upcoming purchasing round, this can help them to choose the vehicle that is cleanest in real-life situations.

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You can find the latest reports on emission measurements on trucks and buses below.

Real-world vehicle emissions

Road vehicles are a major source of air pollutant emissions. This involves substances such as nitrogen oxides (NOx) and particulate matter (including PM10), both of which are harmful to health. Vehicle... Read more
Our work

Emission factors for road traffic

The emission factors for road traffic are official estimates of vehicles’ average real-world emissions, broken down by type of vehicle, Euro class, type of road and traffic conditions. In the Netherlands,... Read more

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