A preliminary investigation indicates that a 2005 Mercedes-Benz operated by a 69-year-old Holyoke woman was traveling southbound on the northbound side of I-91. The Mercedes hit a 2013 Honda Civic head-on in the left-hand lane of I-91 northbound, according to authorities. The driver of the Mercedes was pronounced dead at the scene. The driver of the Honda Civic, a 25-year-old Springfield man, was transported to Baystate Medical Center with serious injuries. The incident remains under investigation by Troop B of the Massachusetts State Police with the assistance of the State Police Collision Analysis and Reconstruction Section and State Police Crime Scene Services Section.