Family, friends and members of the Colorado State Patrol said goodbye Friday to trooper Cody Donahue.Donahue, 34, was struck and killed by a semitruck along Interstate 25 south of Castle Rock on Nov. 25. He was hit while investigating another accident. He died instantly. He is survived by his wife and two young children. A procession began at 9:45 a.m. at the Ellis Family Services in Littleton. It traveled onto westbound C-470 from West Bowles Avenue. The U.S. Honor Flag accompanied Donahue's body. The procession then went down Highway 285 to the Denver First Church of the Nazarene (3800 E. Hampden Ave.). As the procession neared South Kipling Street, more vehicles made up a massive procession. Several drivers stopped and got out of their vehicles as the procession traveled eastbound on Hampden. Several other people lined the streets, many with flags, to pay their respects. Originally from North Dakota, Donahue had been with the Colorado State Patrol for 11 years. Donahue's family issued a public statement Thursday thanking everyone for their love and support during this difficult time. They also begged drivers to watch for emergency vehicles and patrol cars, and to slow down.