Onondaga County Sheriff Kevin Walsh tells the Post-Standard of Syracuse and WSTM-TV that 59-year-old John Tomaszewski was using his personal GPS device and not the system installed on Megabus when it hit the bridge over the Onondaga Lake Parkway early Saturday morning.
Walsh says investigators are trying to determine whether Tomaszewki was holding the device or merely listening to it at the time of the crash.
Police say the bus was too tall for he bridge's 10-foot, 9-inch clearance.
Officials say Tomaszewki hit the bridge after making a wrong turn off Interstate 81.
Two people with local ties died in the crash: 18-year-old Deanna Armstrong of Voorhees, N.J. and 19-year-old Kevin Coffey, a Temple University sophomore from Kansas.