When passing on a two-lane road, how many feet ahead should you engage your left signal light in business or residential areas before making a turn?

Engaging your left signal light 100 feet before making a turn in business or residential areas is important for safety and communication with other drivers. This distance provides adequate warning to other road users, allowing them to anticipate your movement and react accordingly. In areas with more traffic, such as business districts or neighborhoods, increasing the signaling distance helps ensure that other vehicles, pedestrians, and cyclists are aware of your intention to turn, thus reducing the likelihood of accidents.

While options like 50 feet may not provide sufficient time for others to notice your signal, longer distances like 200 or 300 feet could be unnecessarily excessive in many situations, potentially causing confusion. Therefore, 100 feet strikes a balance between alerting other drivers in a timely manner without being overly cautious.