Level of concern about road safety issues (Drinking Drivers, Running Red Lights, Child Safety, Street Racing, Distracted Drivers, Excessive Speeding, Cell Phones, Drowsy Drivers, Children Using ATV's, Older Drivers, Young Drivers)

Percent of self-reported aggressive behaviour in 2002 and 2006 (Swear under my breath, Drive well over speed limit, Speed up to get through light, Use horn when annoyed, Make rude signs at other drivers, Take risks for fun)

Average perceived frequency of six driving behaviours in 2001 and 2006 (Excessive speeding, Fail to signal, Tailgating, Weaving in/out traffic, Failing to stop at sign, Running red light)

Percent of horn usage, when annoyed, by age (16 to 24 years old, 25 to 75 years old), Percent of aggressive drivers by gender, Percent of aggressive drivers by age (16 to 44 years old, 45 to 75 years old)