Local law enforcement will be conducting emphasis patrols from Aug. 17 through Sept. 3 to keep drivers safe during what is typically the deadliest time of the year on the state’s roadways.

The emphasis patrols will be made up of law enforcement in Grays Harbor, Mason and Pacific counties.

The extra scrutiny comes on the heels of a new report from the Washington Traffic Safety Commission that provides insights into what has become the most common form of driver impairment — “poly-drug use,” two or more drugs or a combination of alcohol and drugs, reads a commission news release.

Beginning in 2012, the number of poly-drug impaired drivers involved in fatal crashes has increased by an average of 15 percent every year, according to the report. As of 2016, one in four of all Washington traffic deaths involve a poly-drug impaired driver. In 2017 alone, 250 people were killed in such crashes.