Section 2  Drivers Who Have Repeated Traffic Violations
   In Section 1, the data showed that drivers who had had multiple accidents tended to cause more accidents thereafter, and that those who had repeatedly committed traffic violations were more prone to accidents than those who had not.
   Well then, do drivers who had repeated traffic offences during a certain period also tend to continue committing violations thereafter? Fig. 3 compares the number of traffic offences drivers committed during 2001-2003 with those committed in 2004-2006, following the same methodology as in the preceding section.
   Of the drivers who had committed no traffic violations during the three year period from 2001, 22.1% got traffic tickets during the next three year period (2004-2006) and a mere 0.2% did so five times or more. But among drivers who had five or more traffic offences in the 2001-2003 period, 84.3% violated traffic rules in the following 2004-2006 period at least once, and the percentage of those who broke traffic rules five times or more reached 14.3%
   Obviously, drivers who repeatedly violate traffic regulations in a given period are likely continue to do so time and again in the future.
Fig.3 Percentage of Traffic Offenders in 2004-2006 according to 2001-2003 Violations

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Institute for Traffic Accident Research and Data Analysis (ITARDA)