By Ben Harder
Although roads are getting safer in many developed countries, traffic accidents are a rising and underestimated killer worldwide, say researchers who have surveyed dozens of recent traffic studies.
In some developing countries, including China, death rates on roadways have at least tripled in recent decades as new fleets of cars have taken to routes that were already crowded with pedestrians, bicycles, and motorcycles. In other places, missing data rule out precise assessments of the toll.