A driver with a dashboard camera recorded a man riding on the outside of a York Region Transit bus Tuesday.

The video shows a man holding onto the back of the bus, his feet resting on the bumper as he holds onto a latch or handle at the back of the bus, as a covering at the back of the bus swings upward.

“This behaviour is not only extremely dangerous, it is also illegal,” York Region Transit said in a statement.

The video appears to show a male clinging onto the rear of the No. 90 bus traveling northbound on Don Mills Road just past Steeles Avenue.

While the video carries a date stamp that would suggest it was recorded in February 2010, it may only be a setting on the camera as the scene matches the early fall scenery and the sunny afternoon Markham residents experienced Tuesday.

"We are aware of this incident and have seen the video," York Regional Police Const. Laura Nicolle said. "We will be working closely with Viva to investigate this incident to determine what exactly took place and who this individual is. What is depicted in the video is obviously a very significant safety concern for that person himself and also for vehicles around the area. We would strongly encourage people to use common sense and use transit the way it is intended to be used."

The poster of the video writes that a witness stopped the bus to alert the driver of his external passenger.

"The black SUV was not impressed... he ended up flagging down the driver of the bus and stopped his SUV in front of the bus to force him to stop. At that point the guy jumped off the bus and sprinted towards the bus stop. Once he got to the bus stop, he just stood there like nothing had happened..."

The video's poster labelled the video "Guy hanging on back of bus in Markham, Ontario, Canada. Recorded 3-Nov-2015."