Why is it only legal in Ontario to pass on a double solid line ? While you can’t do it anywhere else … I find it a dangerous maneuver

This is one of those questions where the technical legal answer and the safe driving answer are not exactly the same. In many places, crossing a double solid line to pass another vehicle is specifically prohibited by law. Ontario is different because, at least right now, Ontario does not have a specific Highway Traffic Act charge that simply says, “you crossed a double solid yellow line.” But that does not mean it is automatically legal, smart, or safe. A double solid line is there for a reason. It is telling you that the roadway has been marked as a place where passing is unsafe. Maybe it is because of a hill, a curve, limited visibility, intersections, driveways, oncoming traffic risk, or some other hazard that may not be obvious until it is too late. So while Ontario may not currently have a specific offence for crossing the double solid line itself, you are still responsible for everything that happens when you make that choice. If you pull out to pass and it is not safe, if the roadway is not clear, if you interfere with oncoming traffic, if you force another driver to brake or move, if you make an unsafe lane change, or if your driving puts someone else at risk, there are still laws in place that can deal with that. And no, police do not need to wait for a collision before action can be taken. Dangerous or unsafe driving behaviour can be dealt with before someone gets hurt. So the simplest answer is this: In Ontario, the line itself may not currently be the specific offence, but your unsafe decision can still be. A double solid line means don’t pass. If you choose to do it anyway, you had better be absolutely sure it is safe, because if it is not, that is on you.