Final answer:
When in a lane directed by a green arrow light, you should turn in the direction instructed and use your signal, while ensuring other traffic is indeed stopping as required. Always check for other traffic or pedestrians who might not follow the signals.
Step-by-step explanation:
When you are moving in a dedicated turn lane controlled by a green arrow light, it means that the traffic signal is directing your lane to make a protected turn.
The correct statement is that all oncoming vehicles and pedestrians are stopped by red lights, implying that it is safe for you to proceed with the turn as the traffic control devices should be ensuring their movement is stopped. However, it is essential to remain vigilant and check for other traffic and pedestrians who may disregard the traffic signal, ensuring your own safety and the safety of others.
Furthermore, the indication of a green arrow does not allow you to go straight; it specifically instructs you to turn in the direction of the arrow and using your turn signal is still a legal requirement to indicate your intended action to other road users.