The 100 Counties in 100 Days campaign was a new initiative by NCDHHS’ Forensic Tests for Alcohol (FTA) Branch and other traffic safety partners to increase Driving While Impaired (DWI) awareness across the state by providing Breath Alcohol Testing (BAT) mobile units in all 100 North Carolina counties during the 100 Deadliest Days of Summer — the period of time from Memorial Day to Labor Day when fatal vehicle crashes increase.