The regular motorcycle exhaust inspection system has been in place since 1996 and is now in its 26th year. This program is dedicated to the station management and equipment certification, subsidy evaluation of motorcycle exhaust inspection station, drafting pollution control strategies for motorcycles in service, etc. In terms of quality management of the inspection stations, we continue to improve various inspection equipment certification procedures to ensure that the inspection equipment meets the quality requirements through formality examination. Over the years, the standard gas sampling test results gradually improve, showing that it can indeed effectively urge gas manufacturers to improve product quality through the standard gas sampling test operations. A gas comparison sampling operation is performed for exhaust analyzers over 5 years old, in order to understand the actual drift of the analyzer. In terms of the subsidy review for exhaust inspection stations, the vehicle license plate recognition system is applied to review the inspection photos, and all photos of license plate numbers are scrupulously checked to improve the overall quality and efficiency of the review. The subsidies are disbursed through official E-billing system, and the check of the application documents required for subsidy disbursement has been strengthened, with the overall remittance rejection ratio maintained at less than 0.1%. During the program period, using the data from 2017 to 2021 of motorcycle exhaust inspection and audit database, we evaluated the effectiveness of motorcycle exhaust inspection in the past 5 years. The overall exhaust emissions have been decreasing year by year, with CO emissions decreased by about 28% and HC emissions decreased by about 20%, indicating good overall control results.

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