Winter weather likely caused a school bus and semi-truck to collide on M-115 in near Farwell Monday morning. Two students and the truck driver were treated for minor injuries. The bus, carrying 14 students, was stopped heading north on Cedar at M-115 just before 7:00AM, waiting for a vehicle pass. The bus driver then pulled into the intersection in front of the semi-truck traveling southeast. Winter weather conditions likely impaired visibility, helping to cause the crash.