Final answer:
To turn left onto a one-way street, the driver should take the leftmost lane, as this is a standardized rule to ensure road safety and efficient traffic flow.
Step-by-step explanation:
When turning left onto a one-way street, you should complete the turn into the leftmost lane. This traffic movement is intended to ensure smooth flow and reduce the chances of collision by following a standardized rule. Drivers and pedestrians navigate through the city using various directional cues, like road signs, that are often universal. As indicated, other paths such as the middle lane or the rightmost lane are not appropriate options for completing this maneuver. This follows the same logic in driving situations where the optimal path, such as cutting the corner on a race track, is chosen to maintain speed and efficiency.