Still, drivers try to beat the averages, including Mr. Schwartz himself, a former cabby who said he is among the city's aggressive drivers.

WSJ: Decoding Traffic In a Jammed City

All of this is couched under euphemistic marketing language about identifying aggressive driving behavior in your teen (or your fleet drivers, if you're the paranoid trucking co. manager-type instead of paranoid parent) and nipping it in the bud early, but don't be fooled, kids -- what this really means is no more clandestine trips to the liquor store without the 'rents finding out.

ENGADGET: DriveSync tracks your kids' joyrides