Final answer:
A shared center lane is a reserved area on a multi-lane road for vehicles making left turns in either direction. It enhances traffic flow and safety by preventing left-turning vehicles from blocking through traffic lanes.
Step-by-step explanation:
A shared center lane is a lane that is not dedicated to traffic moving in one direction or the other, but is instead reserved for the use of vehicles making left turns in either direction. This type of lane is commonly indicated by parallel dashed yellow lines on either side and is often marked with arrows or signs. The main purpose of a shared center lane is to facilitate the movement of vehicles waiting to turn left without obstructing the through traffic lanes.
Using a shared center lane can help decrease traffic congestion, reduce the risk of rear-end collisions, and improve the overall flow of traffic. As a traffic safety measure, it is critical for drivers to understand that this lane is not for through traffic or overtaking other vehicles, but solely for those preparing to make left turns.