Research consistently has shown intersections are potentially deadly for all drivers. But experts agree this is more of an issue for seniors, who are far more likely to die in a crash due to age-related medical conditions and frailty than younger motorists.

The institute is a nonprofit organization, funded by major insurance companies, dedicated to improving highway safety through research and education. Its March Status Report released Monday also included a study by the institute and the University of Alabama that looked at the Florida law, effective in 2004, requiring drivers age 80 and older to pass a vision test when renewing their license.

The research found 80 percent of those eligible to renew their license attempted to do so and that ultimately, 93 percent succeeded — although 12 percent had to try a second time. Those who opted not to renew tended to be older, female and in poorer health; half said they decided not to try because they did not think they could pass the vision test.

About three-fourths of 1,242 older drivers surveyed said they did not think the age-related vision screen was unfair.