Abstract
Urban traffic expert developed many methods to judge the performance of urban road to provide driving instruction to both drivers and the local authority. In Beijing, the traffic performance index is widely used by people every day. In order to store the traffic performance index data which is continually changed to local database, our team has tried many different ways to achieve it because we want to do deep analyze of it. By using VBA programming we successfully build a data extract system to store data. We use two different ways to process the data from the system based on data missing type. At last, the data is ready for further study to find the traffic pattern of urban area.
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