If a heavy commercial truck suffers total electrical lighting failure (headlights and dash lights extinguish completely) on an unlit rural highway at night, what should the driver do?

1. Immediately turn on the hazard warning flashers (independent circuit), ease off the throttle, maintain a straight line, look at roadside retro-reflective markers, and stop on the right shoulder
2. Accelerate to reach the next town before complete darkness sets in
3. Swerve into the opposing lane to see if oncoming car headlights illuminate the road
4. Shift into neutral and coast down the center of the road