What is the first action a driver of a disabled truck or bus should take?

The first action a driver of a disabled truck or bus should take is to ensure safety by setting out flares, reflectors, or flags. This step is crucial as it helps alert other drivers to the presence of the disabled vehicle, reducing the risk of accidents. By using these warning devices, the driver increases visibility and provides a clear signal that there is a hazard on the road.

While calling for assistance, moving the vehicle to a safe area, and turning on hazard lights are important actions, they may follow after establishing a visual warning to prevent further incidents. The priority is to protect both the driver and other road users by making the situation visible to oncoming traffic.