When a driver physical condition while on a trip requires the driver to stop driving but stopping would not be safe the driver should?

If a driver's physical condition requires them to stop but it is unsafe to do so, they should look for the nearest safe location to pull over, such as a rest area or a parking lot. If immediate stopping is not possible, the driver should slow down, maintain control of the vehicle, and use hazard lights to alert other drivers. Additionally, they should seek assistance by calling emergency services or roadside assistance if necessary. Prioritizing safety is crucial in such situations.