The results almost certainly vary by region (because regional traffic, weather and economic conditions impact who buys what). Measuring aggressiveness is going

The results almost certainly vary by region (because regional traffic, weather and economic conditions impact who buys what). Measuring aggressiveness is going to be a measurement of outliers. For everyone weaving through traffic in their BMW without turn signals there's a gray hair putting along. For every Tacoma clogging up the left lane there's a Prius taxi hauling ass to the next fare. I don't think it's a very informative thing to try to measure.