On a two-way roadway with a center lane, what can drivers from either direction do in that center lane?

In a two-way roadway that has a designated center lane, the primary purpose of this lane is to allow for safe left turns from either direction. When drivers are using the center lane, they can prepare to make a left turn into a driveway or at an intersection, which minimizes the risk of collisions with oncoming traffic.

The center lane provides a space where vehicles can wait, allowing them to turn left without obstructing the flow of traffic in either direction. This design helps to reduce distractions and enhances safety, as vehicles can enter the lane without having to fully merge into oncoming traffic.

The other activities mentioned, such as making U-turns, right turns, or passing slower vehicles, are typically not permitted in the center lane, as such actions could cause confusion and increase the likelihood of accidents. The focus of the center lane is to facilitate safe left turns, which is why that option stands out as the correct response.