Careless driving is defined as driving without due care or attention, or without reasonable consideration for others using the highway.
It comes with a pretty steep penalty. 6 demerit points is a lot of demerit points to lose for a single, isolated incident. It comes with a monetary fine which could be $400 or on the higher end of the spectrum $2000, depending on the severity of the situation, but it also comes with at least 100% increase to your insurance premiums, if your company doesn’t actually drop you completely.
With that being said, it is an offence that I would highly recommend we proceed to trial with, because of my firm’s high success rate in dealing with these particular matters.