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Opus' remote sensing devices have helped to expose on-road NOx emissions from trucks equipped with defeat devices.
HDDVs contribute a disproportionate amount of nitrogen oxides and particulate emission from motor vehicles. Unfortunately few HDDV inspection programs exist and those that do only conduct a smoke opacity test. Remote sensing can help to fill this gap, providing much needed real world emission data to monitor HDDV emissions.
Opus remote sensing has contributed significantly to HDDV surveillance efforts. In the late 1990s we helped expose the high on-road NOx emissions from trucks equipped with defeat devices (Reference). More recently Opus remote sensing has been used to identify individual aftermarket defeat devices used to avoid the cost of meeting low emission regulations.
In 2017, Opus Remote Sensing Europe helped the Danish police in a project to identify high-emitting trucks whose drivers had fitted defeat devices or disconnected their emission controls to cheat on low emission regulations. Roadside remote sensing inspections were carried out at several locations in Copenhagen and on the border between Denmark and Germany. If the pollutant levels were above limits, the police stopped the truck for an immediate inspection, providing a highly-effective way to enforce emission standards.
Clean Screen offers owners of the lowest polluting vehicles exemption from their next station-based emission test.
Remote sensing can identify the worst polluting vehicles, enabling government agencies to target those that cause the biggest problems for air quality.
Remote sensing can be used to assess the effectiveness of an inspection program, or evaluate emissions by area or vehicle type.