When overtaking a truck on the highway, you should follow these key safety steps:

• Check that overtaking is safe and legal (no road signs prohibiting it), with a clear view ahead and no oncoming traffic.
• Signal your intention early using your indicator to let other drivers and the truck driver know.
• Maintain a safe following distance behind the truck before starting the maneuver to avoid the truck's blind spots and reduce reaction time in case of sudden braking.
• Move out smoothly and accelerate promptly to pass the truck quickly but within the speed limit.
• Avoid lingering alongside the truck due to its wind turbulence and blind spots.
• Only return to your lane when you can see the truck's headlights in your rear-view mirror and after checking mirrors and blind spots to ensure it is safe.
• Leave extra space between your vehicle and the truck when merging back in, so the truck has enough stopping distance.
• Never overtake on curves, hills, or places where visibility is poor.

These steps ensure both your safety and the truck driver's safety by accounting for truck blind spots, braking distances, and road conditions.