Final answer:
In a city, you should signal at least 100 feet before your turn, and in the country, at least 200 feet ahead of the turn to ensure safety and clear communication with other road users.
Step-by-step explanation:
In city traffic conditions, it is generally recommended to signal at least 100 feet before you make a turn. While in the country, where speeds may be higher and visibility longer, signaling at least 200 feet ahead of your turn is a prudent practice. These recommendations help to ensure that other drivers and pedestrians are clearly informed of your intentions to turn, promoting road safety.
Moreover, it's important to adapt to the specific conditions, as if many vehicles speed through the intersection despite the posted speed limits, then signaling well in advance could be even more critical to ensure safety.