We have all sorts of dedicated lanes these days on our freeways and highways.
The ubiquitous carpool lane has been around for many years. As you know, the core idea is that people will be voluntarily nudged to ride together in a car rather than each using a car individually. That’s the High Occupancy Vehicle (HOV) concept in contrast to the Low Occupancy Vehicle (LOV) approach.
The justification for carpooling is pretty straightforward.