California’s motorcyclists could soon have clear rules on lane splitting after the state on Friday became the first in the nation to formally legalize the practice.

Gov. Jerry Brown has signed legislation by Assemblyman Bill Quirk (D-Hayward) that defines the practice and authorizes the California Highway Patrol to establish rules for motorcyclists on how to do it safely.

Assemblyman Tom Lackey (R-Palmdale), a retired state highway patrol sergeant who co-wrote the bill, called the new law a “groundbreaking step.”

“This is a huge win for roadway safety,” Lackey said in a statement. “We are now giving riders and motorists clear guidance on when it is safe.”

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