Complex reconstruction of a multi-vehicle accident

The paper presents a reconstruction of a road accident involving several vehicles. A two-stage collision analysis is presented. In the first stage, the mutual position of the vehicles during the collision phase was determined based on vehicle deformations. Subsequently, their speeds were estimated based on traces left at the scene. The second stage of the paper includes information regarding the collision simulation performed using the PC Crash software. The simulation confirmed the assumptions established in the first stage of the work.Analyzing road accident statistics from 2009 and 2010, a clear decrease in the number of accidents can be observed. Last year, a total of 38,776 accidents occurred on Polish roads; for comparison, 44,196 accidents occurred the previous year, which is 5,420 fewer. The year 2010 also saw a decrease in the number of people who died as a result of road incidents. Last year, 3,902 people died, compared to 4,572 in 2009, which is 670 fewer. The number of injured also fell. In 2010, it amounted to 48,872, while in 2009 it was
56,046, a decrease of 7,174. Back in 2001, there were 53,799 accidents on Polish roads – now this number has dropped by over 15 thousand. It is also worth noting that in 1989, over 8.5 million cars were registered in Poland. At that time, there were over
67 thousand accidents. Over the years, the number of cars moving around Poland has increased to over 21 million, while the number of accidents has fallen to less than 39 thousand. (…)

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