When may you use hand and arm signals instead of mechanical turn signals?

Question

During daylight hours, hand and arm signals may be used in addition to or instead of mechanical turn signals. You may not use hand signals at night or while driving a vehicle constructed or loaded so that hand signals are not clearly visible to other drivers.

Accepted Answer

During the day.

Answer

During the night.

Answer

When driving a loaded vehicle that blocks your hand signals from other drivers.

Answer

In low-visibility situations.