CA, bay area to be exact.
A carpool lane is a special freeway lane only for buses and/or carpools. You may use a carpool lane or onramp if your vehicle carries the minimum number of people required for the carpool lane or you drive a low-emission vehicle displaying a special DMV-issued decal. Motorcycle riders may use designated carpool lanes, unless otherwise posted. Signs at the onramp or along the freeway tell you the minimum number of people required for the carpool and the hours the carpool requirement applies. The pavement in this lane is marked with a diamond symbol (◊) and the words "Carpool Lane." These lanes are also known as high-occupancy vehicle (HOV) lanes. Do not cross over double parallel solid lines to enter or exit any carpool lane except at designated entry or exit places. Vehicles towing trailers are typically not allowed to use carpool lanes because they must drive more slowly and are usually restricted to the right-hand lane.
Entering and exiting the carpool lane on the freeway is regulated by the type of line on the right hand side of the lane. The driver can enter or exit the lane only when the lane is not bordered by a white solid line.
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.
The employees that get picked up in a carpool drive in the carpool lane.
If you are carpooling. If you are asking if a fetus qualifies a solitary woman to use the carpool lane, then no.
diamond
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.
no
A carpool lane allows people who have more than 2 people in the car to be able to use that lane to go through traffic easier.
Yes, children of all ages count as passengers/carpool buddy.
The left most lane