Summerside Police are investigating a single vehicle collision last Thursday afternoon. Police received a 9-1-1 call shortly before 1:30pm about a vehicle in a ditch on Mill Crescent. Police arrived on scene and say the driver of the vehicle, a thirty-five-year-old woman from Summerside, was showing signs of drug impairment. The woman was arrested for driving while drug impaired and released with a seven-day driving prohibition and the vehicle was impounded. A blood demand was made to the driver and blood analysis is pending.