The main work items of this project included: assist EPA (Environmental Protection Administration) to examine the applications of new vehicle type approval with regard to noise, to review the current regulations and noise control policy for further improvement and to study the world-wide regulations development in vehicle noise control area. Firstly, for the new vehicle type approval with regard to noise, 888 new type certifications were granted up to November 30, 2011. The statistics of new vehicle spot check and quality control test reports showed fully comply with the COP (Conformity of Production) requirements. A new function to transform the single vehicle noise test report in the “Vehicle noise test reports Management system” was developed to improve the certification and authorization efficiency of single vehicle application. Secondly, in terms of vehicle noise inspection and management, this project cooperates with EPA to integrate the Emission and Noise certifications. The jobs include counseling with emission and authorization departments, and proposed new draft for the briefing of the examination workflow. On the other hand, owing to the environmental limit of in-use vehicle noise test method. The environment affection study showed that the noise measurement result will be interfered by using current test method. Therefore, this project proposed a new way to isolate the disturbance from the test environment. Finally, because of the tendency of international regulation harmonization, this project continually paid close attention on the progress of UN/ECE vehicle noise regulations. Since the UN/ECE new test methods are about to reach a conclusion, two proposals for the new test method of the next phase were completed in this project. By the way, the law-making process should be accomplished in the next year.