All beneficiariesorganizationCity MunicipalitiesIdeas that could help City MunicipalitiesPlume-Based Emission Enforcement ServiceA roadside monitoring service using plume chasing and regression to identify high-emitting heavy-duty vehicles for regulatory inspection. The system integrates advanced signal analysis to distinguish between mechanical defects and deliberate emissions tampering.Why it helps: Rapidly reduces urban NOx and particulate levels by removing the most polluting 'outlier' vehicles from the road.