The "Car on Shoulder" is becoming a standard warning for mostly just abandoned cars, the problem with this is there could be a genuine hazzard where there is a car slightly hanging over or someone changing their tire, three car pile ups, etc.

The problem of the vagueness of "car on shoulder" is being overused. It should stay, but we might need others like "Abandoned Car" and "Truck on Shoulder" for like a tow truck or a semi-truck with a blown out tire or a larger vehicle on or near the road.