HOV lane (High Occupancy Vehicle)
2+ passengers must be in the vehicle while driving in said lanes.
HOV - High Occupancy Vehicle - lane.
On a freeway/highway, the lane which contains the diamond like shape is a separate travel lane. Specifically this lane is dedicated to the "ride share" and/or individuals carpooling.
The question is a true statement.
If you are referring to a freeway division (as in on the road), the answer is "lane." (:
A diamond lane on the freeway means it is a special lane on a highway or street that is reserved for a specific type of traffic (such as cars carrying more than one passenger). These lanes are also meant for the drivers who are not exiting any time soon.
The left most lane
It's an HOV - High Occupancy Vehicle - lane. Provided the lanes are open, they're available for use by any vehicle with two or more passengers.
That is the marking for an HOV (High Occupancy Vehicle) lane.
A weave lane is the part of the highway or freeway where both an entrance and exit exist. It is called this because cars will be weaving in and out of lanes to either enter or exit.
The fast lane is typically the leftmost lane on a multi-lane highway or freeway.
in the center lane
If there are 3 lanes on your side of the freeway, the right-hand lane is there for vehicles to merge onto the freeway and it is the place for slower moving vehicles to drive; such as big rigs or cars towing anything. The lane in the middle is the passing lane for slow moving traffic, and it is the lane for primary travel of other than slow moving vehicles. The lane to the far left is for passing only, except when designated for specific use, like a carpool lane.