OSAR is a consortium aiming to shift the regulation of vehicle emissions by using advancements in vehicle emission sensors, data science, big data management, and network vehicle connectivity. Current regulations are based on laboratory certifications that do not reflect real-world conditions, resulting in a gap between certification and in-use emissions. The solution is to measure all vehicles using on-board sensing and validate compliance from the in-use fleet of vehicles under the conditions where they produce emissions. As part of OSAR, RedNOx’s is to create an on-board reporting NOx sensor system for the heavy-duty truck industry to control emissions using real-world data. The company is working to get its LoNOxTM sensor adopted by the industry and in all new heavy-duty trucks as well as retrofit older ones based on feedback from regulatory agencies, and eventually extend this approach to other mobile sources.