Safe behaviors when overtaking another vehicle, such as a truck, include the following:

• Check your mirrors and blind spots carefully before starting the overtake to be aware of any vehicles around you.
• Indicate your intention to overtake in advance, signaling at least several seconds before changing lanes or moving to pass.
• Check ahead for approaching traffic to ensure there is enough clear distance and no oncoming vehicles that would make overtaking risky.
• Position your vehicle properly by moving to the overtaking lane only when it is completely safe.
• Accelerate decisively but without exceeding the speed limit, minimizing the time spent overtaking.
• Ensure you have ample space to return safely to your lane, typically when you can see the overtaken vehicle fully in your rearview mirror.
• Avoid overtaking on curves, hills, or places with poor visibility where you cannot see oncoming traffic.
• When overtaking a truck, maintain a safe distance, avoid lingering in the truck's blind spots, slow down until you can see the truck driver in their mirrors, and never cut in too closely in front of the truck after overtaking.
• Always respect road signs and markings that prohibit overtaking and be extra cautious in adverse weather or low light conditions.

Unsafe behaviors to avoid include exceeding the speed limit and overtaking without confirming clear and sufficient space both ahead and in the opposite lane.