The US National Highway Traffic Safety Administration has set up a program to gather information about car crashes using data from sensor boxes.
The third explanation is a problem with the Android operating system and how it manages data, detects errors or avoids crashes.
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They were collected primarily through police reports in 2007, death certificates and the number of fatalities registered by the Not-in-Traffic Surveillance system, a virtual data collector of details regarding nontraffic crashes nationwide.
That marked the first time since 1981, when data were first available, that motor vehicle crashes were not among the nation's top 10 causes of death.
Volvo's U.S. manager of product safety and compliance, Adam Kopstein, says his company's engineers began doing tests to simulate small-overlap crashes in the 1980s after analyzing data collected from car accidents in Sweden and other countries.
Users of the free version can store one week of data and record the basic information about problems like crashes.
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An analysis of Health Ministry data shows that 9, 059 car occupants died in vehicle crashes in Brazil in 2010, according to the most recent statistics available.
They're collecting, pooling and analyzing huge quantities of data, looking for minor incidents that don't result in crashes or near misses, but potentially could.
But a spokesman for the Transport Research Laboratories, which investigates car crashes, said the organisation would "love" to get at the data in the recorders but currently the manufacturers are keeping it to themselves.
Companies make many copies of the same electronic data to analyze and share it and also to protect themselves if their computing infrastructure crashes, say, due to a blackout or to comply with record retention policies.
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