Novice drivers (≦2 years of driving experience) display a significantly higher risk of traffic violations, yet their risk on accident severity is significantly lower than the other categories of drivers. Drivers with 3–5 years of driving experience, passenger vehicles, bad weather and the morning rush hour (7:00–8:59) display an increased risk of traffic violations, while their association with a fatal/severe injury is not significant. Furthermore, since 2007, traffic violation rates increased significantly; in fact, an increasing trend was observed, while the fatal/serious injury accident rate remained rather stable. Commercial vehicles, good street lighting at night, public holidays and mid-night to dawn (00:00–06:59) do not have a significant effect on traffic violations, but when traffic violations do occur, these factors confer a higher risk of a fatal/serious injury.