Final answer:
The lane that only allows buses and HOVs and may show how many people must be in the HOV is known as the High-Occupancy Vehicle (HOV) lane and may have a 2 people minimum requirement.
Step-by-step explanation:
The lane that only allows buses and HOVs and may show how many people must be in the HOV is known as the High-Occupancy Vehicle (HOV) lane. This lane is designated for vehicles with a certain number of occupants in order to alleviate traffic congestion and promote carpooling. In this case, the lane may indicate a 2 people minimum requirement. This means that only vehicles carrying at least 2 people, including the driver, are allowed to use this lane.