Final answer:
You should turn left from the lane furthest to the left on a three-lane, one-way street, following road markings and traffic laws.
Step-by-step explanation:
When turning left from a three-lane, one-way street, you should turn from the lane furthest to the left. This is typically the lane designated for vehicles making a left turn and is closest to the centerline or median of the roadway. It is important to follow the road markings and signs that indicate the correct lane for turning left to ensure safety and compliance with traffic laws. Turning from the correct lane also helps in preventing congestion and potential collisions with other vehicles on the road.