{"accessLevel": "public", "bureauCode": ["020:00"], "contactPoint": {"fn": "Richard Baldauf", "hasEmail": "mailto:baldauf.richard@epa.gov"}, "description": "PEMS-chasing experiments were conducted for twelve heavy-duty diesel vehicles (HDDTs) to evaluate the accuracy of mobile measurement results. Two data processing approaches were integrated to automate the calculations of fuel consumption-based emission factors of nitrogen oxides (NOX). With a total of 245 plume chasing tests conducted, and then averaged by vehicle and road types, we found that the relative errors of vehicle-specific emission factors using an algorithm developed for this project were within approximately \u00b1 20% of the PEMS results for all tested vehicles. Stochastic simulations suggested reasonable results could be obtained using fewer chasing tests per vehicle (e.g., 71% for freeways and 93% for local road, equivalent to two chase tests per vehicle). This study improves the understanding of the accuracy of the mobile chasing method, and provides a practical approach for real-time emission measurements for future scaled-up mobile chasing studies. \n\nThis dataset is associated with the following publications:\nWu, Y., H. Wang, K. Zhang, S. Zhang, R. Baldauf, P. Deshmukh, and R. Snow. Evaluating mobile monitoring of on-road emission factors by comparing concurrent PEMS measurements.   SCIENCE OF THE TOTAL ENVIRONMENT. Elsevier BV, AMSTERDAM,  NETHERLANDS, 736: NA, (2020).\nBaldauf, R., X. Zheng, Y. Wu, S. Zhang, K. Zhang, and J. Hao. Joint measurements of black carbon and particle mass for heavydutydiesel vehicles using a portable emission measurement system.   ATMOSPHERIC ENVIRONMENT. Elsevier Science Ltd, New York, NY, USA, 141: 435-442, (2016).", "distribution": [{"downloadURL": "https://pasteur.epa.gov/uploads/10.23719/1503687/Data%20for%20China%20MOST%20Chasing_PEMS%20Paper.xlsx", "mediaType": "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", "title": "Data for China MOST Chasing_PEMS Paper.xlsx"}], "identifier": "https://doi.org/10.23719/1503687", "keyword": ["PEMS", "diesel emissions", "mobile chase data", "truck study"], "license": "https://pasteur.epa.gov/license/sciencehub-license.html", "modified": "2019-04-04", "programCode": ["020:000"], "publisher": {"name": "U.S. EPA Office of Research and Development (ORD)", "subOrganizationOf": {"name": "U.S. Environmental Protection Agency", "subOrganizationOf": {"name": "U.S. Government"}}}, "references": ["https://doi.org/10.1016/j.atmosenv.2016.07.013", "https://doi.org/10.1016/j.scitotenv.2020.139507"], "rights": null, "title": "Joint measurements of black carbon and particle mass for heavydutydiesel vehicles using a portable emission measurement system"}