The highway patrol investigated a car-pedestrian collision that occurred on Wooster Street in Bowling Green at 1:50 this morning.  18 year old Emily Krohn of Granger, Ohio stepped from the sidewalk onto the roadway near Enterprise Street.  She was struck by a vehicle driven by 21 year old Andrew Gray of Findlay.  Krohn was treated at the scene for minor injuries, while the driver and passengers in the auto were not injured.  Troopers report alcohol was a factor for both the driver and victim, with citations handed to each, including underage consumption.