A pedestrian was fatally struck by two cars on I-84 East in Southbury.  State police identified the pedestrian as 52-year old Ricky Izzard of Milford.  The accident happened shortly before midnight between the Exit 15 ramps.  Troopers say two vehicles were travelling in each lane of the highway when a pedestrian, who was standing in the shoulder, began crossing the travel lanes headed northbound.  The drivers, a 27-year old Waterbury man and a 51-year old Waterbury man, who sustained suspected minor injuries, remained on the scene after crash.