A core element of the TRUE project is the ongoing collection of data on real-world emissions from in-use vehicles in cities.

Data will come from two main sources: test results supplied by third parties, such as independent testing facilities or government laboratories, and vehicle tests commissioned by or carried out by the TRUE initiative itself. Emission measurements will be made using two different but complementary techniques: portable emissions measurement system (PEMS) testing and remote sensing.

The TRUE project has already compiled a large database of real-world emissions data from third-party institutions.

Two of the most important datasets incorporated thus far are PEMS testing data on over 200 vehicles collected and published by the governments of France, the United Kingdom, the Netherlands, Belgium, and Germany, and a database of more than 700,000 measurements made via remote sensing as part of the CONOX project, and supplied by IVL. The CONOX project is being conducted under the umbrella of the European research network on mobile source emissions — ERMES, http://www.ermes-group.eu/web/ — which involves a dedicated working group on remote sensing. Various remote sensing research groups in Europe are presently working together to pool and analyze remote sensing data collected at various locations across Europe during the last 5–10 years. In addition to supporting the TRUE project, the CONOX remote sensing database will be a new cornerstone within ERMES, complementing the existing ERMES database of chassis dynamometer and PEMS data. 

Data collection commissioned by the TRUE initiative itself will commence with remote sensing measurements in London and Paris in late 2017 and early 2018. These initial remote-sensing measurements will eventually yield a database of over 200,000 vehicle records. Data collection will continue as the TRUE initiative grows and expands its network of data providers.

Publications

Policy assessment using real-world emissions data from vehicles in Scottish cities Policy assessment using real-world emissions data from vehicles in Scottish cities

Policy assessment using real-world emissions data from vehicles in Scottish cities

Warsaw low-emission zone: The potential emissions benefits and impact on drivers Warsaw low-emission zone: The potential emissions benefits and impact on drivers

Warsaw low-emission zone: The potential emissions benefits and impact on drivers

Measurement of real-world motor vehicle emissions in Jakarta Measurement of real-world motor vehicle emissions in Jakarta

Measurement of real-world motor vehicle emissions in Jakarta

Air quality and health impacts of diesel truck emissions in New York City and policy implications Air quality and health impacts of diesel truck emissions in New York City and policy implications

Air quality and health impacts of diesel truck emissions in New York City and policy implications

Evaluation of real-world vehicle emissions in Warsaw Evaluation of real-world vehicle emissions in Warsaw

Evaluation of real-world vehicle emissions in Warsaw

Remote sensing of motor vehicle emissions in Seoul Remote sensing of motor vehicle emissions in Seoul

Remote sensing of motor vehicle emissions in Seoul

The impact of a low emission zone in Sofia The impact of a low emission zone in Sofia

The impact of a low emission zone in Sofia

Annual Report 2021: Counting on Clean Air - A Call to Action Annual Report 2021: Counting on Clean Air - A Call to Action

Annual Report 2021: Counting on Clean Air - A Call to Action

Evaluation of real-world vehicle emissions in Brussels Evaluation of real-world vehicle emissions in Brussels

Evaluation of real-world vehicle emissions in Brussels

Development and application of a US real-world vehicle emissions database Development and application of a US real-world vehicle emissions database

Development and application of a US real-world vehicle emissions database

Impacts of the Paris low-emission zone and implications for other cities Impacts of the Paris low-emission zone and implications for other cities

Impacts of the Paris low-emission zone and implications for other cities

Remote sensing of motor vehicle emissions in Paris Remote sensing of motor vehicle emissions in Paris

Remote sensing of motor vehicle emissions in Paris

TRUE Fact Sheets TRUE Fact Sheets

TRUE Fact Sheets

About TRUE booklet About TRUE booklet

About TRUE booklet

How can real-world vehicle emissions data help cities to become zero-emission: some evidence from Europe How can real-world vehicle emissions data help cities to become zero-emission: some evidence from Europe

How can real-world vehicle emissions data help cities to become zero-emission: some evidence from Europe

Remote sensing of motor vehicle emissions in London Remote sensing of motor vehicle emissions in London

Remote sensing of motor vehicle emissions in London

Use of remote-sensing technology for vehicle emissions monitoring and control Use of remote-sensing technology for vehicle emissions monitoring and control

Use of remote-sensing technology for vehicle emissions monitoring and control

The first TRUE city symposium The first TRUE city symposium

The first TRUE city symposium

Determination of real-world emissions from passenger vehicles using remote sensing data Determination of real-world emissions from passenger vehicles using remote sensing data

Determination of real-world emissions from passenger vehicles using remote sensing data

Explanation of the TRUE rating scheme Explanation of the TRUE rating scheme

Explanation of the TRUE rating scheme

Michael R. Bloomberg, UN Secretary General's Special Envoy

"These new vehicle scorings will empower consumers to make informed choices that protect public health and the planet."

Michael R. Bloomberg, UN Secretary-General's Special Envoy for Cities and Climate Change