VC 22107:  No person shall turn a vehicle from a direct course or move right or left upon a roadway until such movement can be made with reasonable safety and then only after the giving of an appropriate signal in the manner provided in this chapter in the event any other vehicle may be affected by the movement.

VC 22107：任何人不得将车辆从直接路线转向或在道路上向右或向左移动，直到这种移动能够以合理的安全性进行，并且只有在以本章规定的方式发出适当的信号后，以防万一任何其他车辆都可能受到该运动的影响。