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Annual Cycles of the Traffic Accident of a City-某城市交通事故年度发生周期

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Annual Cycles of t。he Traffic Accident of a City

     Traffic accidents are one of the most serious problems in modern cities. Many people have lost their lives every ye。ar.
     The two graphs show t。he comparison of traffic accident cycles in a。 city for the past two years (2003 and 2002). In each graph, the arrow indicates the annual average point for each t。raffic accident. The chart for 2003 tells us that most。 traffic accidents happened in Decemb。er, while early spring(March) has a relatively higher percent. Traffic accidents decrease f。rom April to October, and July has the lowest percen。tage of traffic accidents for 2003。.
     In 2002, the low points lasted for five mont。h。s, from May,to Septe。mber. The yearly peak of accidents was in February.In comparison with that in 2003, the pe。rcentage of peak points decreas。ed by 30%. The variation between monthly traffic。 accident percentages is much less than that of。 2003.




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