| Summary: | 碩士 === 國立政治大學 === 應用物理研究所 === 107 === In this thesis we analyze the average speed and traffic flows in each segment between two adjacent toll gantries on national freeways in Taiwan using data recorded by Electronic Toll Collection (ETC) systems. Our analysis is based on two data sets provided by the Traffic Information Service of the Ministry of Transportation and Communications, namely (1) the M03A Data Set which records the traffic flow per five minutes per day passing through each toll gantry; (2) the M05A Data Set which records the traffic volume and average speed of vehicles passing through the two adjacent gantries every five minutes a day. Dividing a day into 24 hours, we analyze the road-segment-wise average speed and traffic volume collected for one year or a certain period of time, and arrange the data into 24 time-intervals representing 24 hours a day. At the same time, we create freeway network maps according to the geographic coordinates of toll gantries and freeways to display our traffic data (analyzed for the year 2017) with freeway network maps; in this way one can gain an overview of the multi-parameter traffic data. In addition, we analyze the traffic data for the Dragon Boat Festival four-day holiday in 2016 and in 2017 in order to examine whether the charging policy implemented in 2016 affected the traffic flows of various time intervals. Our data analysis and visualization were carried out using Python and scripting languages, such as AWK.
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