Final answer:
In a rural area, you should generally signal at least 100 feet before turning or changing lanes, but it's often safer to signal 200 to 300 feet in advance due to higher speeds and longer required reaction distances.
Step-by-step explanation:
When driving in a rural area, it is typically required by law to signal at least 100 feet before turning or changing lanes. However, this distance may vary depending on the state or country's traffic laws.
To ensure safety and compliance with local regulations, it is recommended to signal well in advance of your intended maneuver, which could be around 200 to 300 feet in rural areas where speeds are higher and drivers have more ground to cover before safely reacting to your signal. Always refer to your local traffic laws to confirm the exact requirement.