In a road with three or more adjoining lanes in the same direction, what is the designation of the far right lane?

The designation of the far right lane in a situation where there are three or more adjoining lanes in the same direction typically serves as the slower-moving lane, which can also be understood as the lane where vehicles generally travel at a lower speed. The term "slow lane" is often used informally to describe this lane, as it is generally where slower vehicles, such as those that are either entering or exiting the road, tend to operate.

Although "passing lane" could refer to the lane designated for faster-moving vehicles, it typically pertains to the leftmost lane, where overtaking occurs, especially on highways. The right lane does not function as the lane for passing; rather, it accommodates cars that may be traveling at lower speeds or preparing to exit.

Therefore, the far right lane is best characterized as the slow lane, supporting traffic flow by allowing quicker vehicles to pass in the other lanes while ensuring that the traffic management is conducive for all users of the roadway.