In order to effectively decrease the dust pollution which caused by cars, and to continue the policies from year to year, the Bureau of Environmental Protection in Tainan county has carried out the project which enhances road flushing during 2010 --- personal road flushing business. The project began on Jan 01, 2011 and ended on Apr 23, 2011. The progress of project are as shown in the summary of work schedule. The abstract of achievements is as follows. 1. The complete length of road flushing of the project is 2,772.28 kilometers which exceeds the goal of 2,345 kilometers demanded by contract, and the total execution rate is 118 %； the execution length of road sweeping is 4,341.34 kilometers which exceeds the goal of 3,675 kilometers demanded by contract, and the execution rate is 118%. Each assignment was completed smoothly. 2. The complete length of road flushing of the project is 2,772.28 kilometers, and total use of water is 3,643.11 tons; the use of water is 1.20 - 1.349 tons one kilometer per month, and use of water averages 1.29 tons one kilometer. It exceeds the contract's standards. 3. The complete dust gathering amount of road sweeping is 61.84 tons. The dust gathering amount is 12.32 – 20.83 kilograms a kilometer per month and the average of dust gathering amount is 14.24 kg/km. 4. Now the total length of street flushing is 2,772.28 kilometers; the reduction amount of TSP is estimated to be 38.26 tons. And the amount is 59.91 kilograms as the result of 4,341.34 kilometers street sweeping. So the total amount is 98.17 tons because of street flushing and sweeping project. 5. According to the investigation of degree of pollution, began on Jan 2011 and ended on April 2011, A level road accounts for 336.8 kilometers of totality (60%), and B level 87.90 kilometers (37.8%), C level 0 kilometers (2.2%). 6. In respect to managing street dust, according to monthly statistics for this county, the average ratio value of general soil is 5.8 %. This results in a predicted increase to C-level pollution sweeping frequency. In 2009 the county bureau of environmental protection randomly inspected five roads, the street dust loading is 2.88-11.96 g/m3. Three roads are A-level, one is B-level, and one is C-level; and inspected ten roads very month. The total length is 55.4 kilometers, 4 roads are A-level, 6 are B-level and C-level is none. 7. The total statistics for this year acknowledges the maintainance of 5,475.943 kilometers of roads which exceeds the goal of 2,917 kilometers demanded by contract (exceeding by a rate of 188 %) indicating that this project has incited commitment and effort to this work. Concurrently, according to the Bureau of Environmental Protection, united sharply reduced formula calculations, estimates TSP sharply reduced volume to be approximately 75.56 tons. 8. This project therefore implements a multitude of robust restraining measures：1. To urgently begin implementing measures dealing with the worsening of air quality；2. To establish coordinated reports and measures that examine and deal with the sources which pollute dirty roads；3. Policies restraining the pollution of farming and irrigation canals；4. Measures to educate the public how to assist Bureau procedure；5. Restrictive ；6. The maintainance and upkeep of flushers & equipment； 7. Measures which assist in dirty and messy places and build cases；8. To announce sanitary measures in accord with the Bureau of Environmental Protection, which rapidly disperse the sources of air polluting matter. Such emissions are to be restrained and reduced.