A group of TTC passenger were treated for minor injuries after a collision on Highway 427.
According to police it appears the TTC bus ran into the back of a transport truck on the highway.
The accident happened in the southbound 427.
Police say 20 people were hurt - none seriously. Mostly they complained of neck and back pain.
They were taken to three area hospitals for treatment.
The bus involved in the collision was the 191 Highway 27 Rocket.