Source: http://www.latimes.com/business/autos/la...

Just six states, California, Florida, Illinois, New York, Michigan and Texas, accounted for 54% of all cycling traffic  fatalities from 2010 through 2012.

Allan Williams, formerly the top scientist at the Insurance Institute for Highway Safety, analyzed fatality data to uncover bicyclist crash patterns and compile the report.

He noted there have been “remarkable changes” in who is dying in crashes involving bicycles and cars. For example, adults age 20 and older represented 84% of bicyclist fatalities in 2012, compared with just 21% in 1975. Adult males comprised 74% of the total number of bicyclists killed in 2012.

In 2012, two-thirds or more of fatally injured bicyclists were not wearing helmets, and 28% of riders age 16 and older had blood alcohol concentrations of .08% or higher, the level at which someone is considered impaired.The lack of helmet use and alcohol impairment continue to contribute to bicyclist deaths, he said.