Final answer:
To make an unprotected left turn in heavy traffic, you should wait in the intersection with your wheels straight until it is safe to turn. Enter the intersection only on a green or yellow light, and complete the turn once there is a safe gap in oncoming traffic. Use a center turn lane if available and safe.
Step-by-step explanation:
When preparing to make an unprotected left turn in heavy traffic, you should wait in the intersection. This means you position your car into the intersection where you're planning to turn left but wait for a safe gap in oncoming traffic to complete the turn. It's important to only enter the intersection when the light is green or yellow and it is safe to do so, and not to block the intersection if the light changes to red.
An unprotected left turn does not have a dedicated left-turn light that allows turns without oncoming traffic. While waiting to turn, keep your wheels straight to avoid being pushed into oncoming traffic in case your vehicle is rear-ended. Once there is a break in traffic and it's safe to proceed, complete the turn without interfering with oncoming vehicles, pedestrians or other road users.
Heavy traffic can make it more difficult to find a gap to turn, but patience and vigilance are crucial for safety. Remember that in the case where a center turn lane is present, you may use this lane to merge before completing your left turn when it's safe to do so.