When is it illegal to pass another vehicle?

Answer: B — On a curve or hill where visibility is limited

Passing another vehicle on a curve or hill where visibility is limited is illegal because it significantly increases the risk of a collision. In such situations, drivers cannot see oncoming traffic that may be approaching, making it dangerous to attempt to overtake another vehicle. The lack of visibility means that you cannot accurately assess whether it is safe to pass, and making this maneuver could lead to serious accidents. Safety regulations are strictly in place to prevent drivers from engaging in risky behaviors that may endanger themselves or others on the road. The law prioritizes maintaining safe driving conditions, which is why passing in areas with restricted visibility is prohibited. This is particularly crucial in maintaining the flow of traffic and ensuring the safety of all road users.