Study shows US motorcycle deaths rose 10 percent in 2015

The annual study for the Governors Highway Safety Association attributes the increase mainly to increased travel nationwide and better weather leading to a longer riding season in many states.

[...] study researchers from Sam Schwartz Consulting say the biggest change that could cut motorcycle deaths would be restoring mandatory helmet laws in 32 states that don't have them for all riders.

"State and national data illustrate that motorcyclists are far more likely to be injured or killed in a crash than motor vehicle occupants," said Jonathan Adkins, executive director of the association, a nonprofit group representing state highway safety offices.