How far in advance should you signal if you are preparing to turn on a highway?

Answer: B — At least 500 ft.

When preparing to turn on a highway, signaling at least 500 feet in advance is vital for several reasons. This distance gives other drivers ample time to recognize your intention, adjust their speed, and create a safe space for you to make your turn. Highways typically involve faster speeds; therefore, a longer signaling distance helps enhance roadway safety by reducing the likelihood of accidents caused by sudden lane changes or turns. Communicating your intentions well in advance allows for smoother traffic flow and facilitates easier navigation for both you and the drivers around you. Given the high speeds often associated with highway driving, a signal given at this distance is essential for ensuring that all road users can react appropriately. It's also important to be mindful of the potential for larger vehicles or cyclists that may require more time to adjust to your movements.