What is the responsibility of a driver when his or her vehicle is stopped for any reason on a road?

The responsibility of a driver when their vehicle is stopped on a road is primarily to warn approaching traffic. This is crucial for ensuring safety because a stopped vehicle can create a hazard to other drivers who may not see it in time to react appropriately. Implementing warning measures, such as using hazard lights or placing warning triangles, allows other vehicles to be alerted of the potential danger and to maneuver safely around the stopped vehicle.

While calling for assistance and checking the vehicle’s oil can be important actions at some point, they do not address the immediate danger posed to oncoming traffic. Moving the vehicle to the shoulder can be a viable option if safe to do so, but the immediate priority should always be to notify and warn other drivers of the vehicle's presence.