Walking in Waterloo Region

[tomh009]

Charges for the actual event apart, leaving the scene of the accident is a criminal code offence and can get you up to six months' imprisonment.

That would be the HTA penalty, I assume.  The potential penalty under the Criminal Code would be much higher.

Right you are: the criminal code penalty can be up to ten years. Edit: Up to 14 years for an accident involving bodily harm, or up to life imprisonment for a fatal accident.

Incidentally, even indirect involvement in an accident requires you to stay on the scene, so I expect that the passengers can also be charged under the criminal code (though not under the HTA).