Police say a driver making a U-turn in a construction zone suffered serious injuries in a two-vehicle collision. 36 year old Jennifer Gott of Dubuque was taken by ambulance to MercyOne Dubuque Medical Center for treatment of serious injuries. According to Dubuque police, Gott was making a U-turn in the construction zone on U.S. Highway 61/151 near Kerper Boulevard at approximately 11:30 p.m. Friday when her vehicle was struck broadside by a northbound vehicle driven by 45 year old James Leifker of Cuba City.