One Edmonton parent is questioning whether her child is safe on his school bus after weeks of unanswered calls for help.

Six-year-old Cole Scott has Tourette Syndrome. As a student in Edmonton Public School’s Opportunities Program, he takes a separate bus to school each day with 20 other children with special needs.

The bus ride from Cole’s home to school takes about two hours time in which the students on board are largely unsupervised.

Once Cole arrived home without a shirt or coat on.

“[He] had an accident from being on the bus so long. Kids were screaming. I heard them coming from down the block through my window. You could hear the screaming on the bus. And I just thought enough," said his mother, Courtney Scott.

Scott said she complained to the school weeks ago, but nothing changed.

"I know it's hard to drive with him by myself, for a long period of time, for the distraction he can cause. But to have 20 kids on a bus, it doesn't seem safe to me," Scott said.

"I'm wondering if I have to rearrange my life so that I can drive him to school and pick him up so that he doesn't have to go through this," she added.

When contacted by CBC News on Monday, Edmonton Public School Board said a second bus will be added to the same route.

"Anytime a parent fears that there's been some sort of misbehaviour on the bus, they need to report that to the school immediately because there are steps they will take," said spokeswoman Jane Sterling.