Keli A. Braitman

TL;DR: The findings lend support to delaying licensure among teenagers in the United States, where licensure commonly is allowed at age 16, and to graduated licensing systems that phase in unsupervised driving during high-risk situations as teenagers gain independent driving experience.

TL;DR: Graduated licensing laws that include strong nighttime and passenger restrictions and laws that delay the learner's permit age and licensing age are associated with lower teenage fatal crash rates, and states that adopt such laws can expect to achieve substantial reductions in crash deaths.

TL;DR: More than half of the nonfatal, at-fault crashes of newly licensed 16-year-old drivers involved more than one contributing factor including speed, loss of control, and slippery roads.

TL;DR: Factor leading to intersection crashes vary with age, even between two age groups of older drivers, and roundabouts and protected left turn lanes at signalized intersections may help to reduce failure-to-yield crashes at intersections, especially among older drivers.

TL;DR: Despite some unnecessary or annoying warnings, most Volvo and Infiniti owners use crash avoidance systems most of the time, and the first requirement of effective warning systems seems largely met.