Final answer:
Do not start to pass if you are within an unspecified distance (typically about 700 feet) of a hill or curve to avoid the risk of a collision with oncoming traffic. Always refer to local driving regulations for the most accurate guidance.
Step-by-step explanation:
When driving, it is important to think ahead and ensure safety not only for yourself but for others on the road as well. Therefore, when approaching a hill or curve, you should not start to pass another vehicle if you are within a certain distance of these features. The exact distance may vary depending on the driving rules of the specific country or state. However, a good rule of thumb is to avoid passing if you cannot see ahead due to obstructions caused by the landscape such as a hill or a curve. The reasoning behind this is simple: if you start to pass without a clear view of oncoming traffic, you risk a collision if another vehicle approaches from the opposite direction.
For example, in many places, the advised distance is to be able to see at least 700 feet ahead of you, which allows for ample time to perceive an oncoming vehicle, react, and return to your lane safely. However, this figure can change depending on your location's traffic laws and conditions. Always refer to the local driving regulations and best practices for the most accurate and lawful guidance.