When turning left, should I look at the front or left traffic signal?

[Oliveira]

When there is a dedicated left-turn traffic light, proceed when it turns green. If there is no dedicated left-turn signal, you may turn left when the straight-through light turns green. Precautions for using turn signals are as follows: While driving: When traffic in your lane is congested and you need to change lanes, check the rearview mirror to see if the adjacent lane is clear. Without obstructing vehicles in other lanes, activate the corresponding turn signal before changing lanes. When making a U-turn: Activate the left turn signal and check for oncoming vehicles in front and behind before proceeding. Honking: On road sections without a solid center line, when overtaking, activate the left turn signal and honk. If being overtaken, yield by moving to the right.