CALDWELL, Idaho (KLIX)-A Washington State trucker was struck and killed while walking the interstate Tuesday morning in Ada County. According to Idaho State Police, the 35-year-old Pasco man had been walking in the westbound lane of Interstate 84 at around 6:37 a.m. when he was hit by a Subaru and killed. Police said the man had abandoned his semi-truck on the on-ramp to the port of entry, blocking the roadway. The driver of the Subaru was not injured and stayed at the scene. The incident remains under investigation by ISP.