I found this infographic (click on it to view full size) on the AAA Foundation for Traffic Safety website. It’s from a study that shows a strong association between the number and age of passengers present in a vehicle when a teenager is driving and the risk of a teen driver dying in a crash.
The report, “Teen Driver Risk in Relation to Age and Number of Passengers,” found that the likelihood of a 16- or 17-year-old driver being killed in a crash, per mile driven, increases with each additional young passenger in the vehicle. Compared to driving with no passengers, a 16- or 17-year-old driver’s fatality risk:
Increases 44 percent when carrying one passenger younger than 21 (and no older passengers)
Doubles when carrying two passengers younger than 21 (and no older passengers)
Quadruples when carrying three or more passengers younger than 21 (and no older passengers)
Conversely, carrying at least one passenger aged 35 or older cuts a teen driver’s risk of death by 62 percent.
Want to know more? Check out the link to the report above.