Translink have said they are implementing a series of recommendations into their training after footage emerged showing a driver letting schoolchildren off the bus on a busy off-slip.
It was filmed on a dashboard camera of a vehicle at around rush hour on the Sandyknowes M2 motorway off-slip on October 5.
Translink then launched an investigation.
Cars are seen travelling down the inside lane of the off slip in the footage.
The car taking the video, also in the inside lane, then slows and stops as an Ulsterbus,in middle of the road, allows its passengers off.
Three people, who appear to be schoolchildren, are then seen exiting the bus before quickly moving across to the grass verge before then walking toward the busy roundabout.
Launching their investigation Translink said they take safety breaches "extremely seriously".
Translink said they could not comment on the individual driver.
A Translink spokeswoman said: "We have conducted a thorough investigation into the circumstances of the incident, including interviews with the driver, reviewing CCTV footage and liaising with senior management at the school concerned.
"There are learnings and recommendations for both Translink and the school and we are currently implementing these into our driver training and safety programme."