Final answer:
You should not begin to pass if you're within a few hundred feet of a hill or curve to ensure road safety and visibility.
Step-by-step explanation:
When driving, you should not start to pass if you are within certain distances of locations where visibility or road conditions make it unsafe. Specifically, you should not start to pass if you are within a few hundred feet of a hill or a curve.
This general guideline is based on the principle of having enough visible roadway to complete the pass safely before encountering oncoming traffic that might be obscured by such geographical features. Exact distances can vary by jurisdiction.
The overarching concern is that passing in such circumstances poses a safety risk due to potential oncoming traffic and reduced reaction times. Always consult and adhere to local road safety regulations and driving laws to determine specific passing restrictions in your area.