Carpool

She wants to live her life in actual physical community, and she welcomes the opportunity to bump into her neighbors at carpool or her fellow book club members at the grocery store. I nodded as my friend described her big-picture.

Source: Don't Overthink It, by Anne Bogel

My question is carpool. What does it mean here? Does it mean that each person pays in turn or no they pay together each time?

<Edited by moderator (Florentia52) for readability >

Carpool : arrangement between people to make a journey in a single vehicle

I use the word carpool for three kinds of ride-sharing:
1a. Parents take turns driving their children somewhere, to a sports activity or to school. Every Monday I drive my child and two other children; every Tuesday you take your child, my child, and the other child; every Wednesday that child's parent takes your child and my child, etc. Payment is not involved because sharing the driving means sharing the cost.
1b. Adults drive to work together, switching drivers and cars according to a daily or weekly schedule. Again, payment is not involved.
2. One person owns a van that seats several people. He drives himself and his neighbors to work and back every day and charges a small amount of money for each round trip, enough to pay for gas and eventually to offset the cost of the vehicle. This is common in places in the US where there is no bus service and the workplace (a factory, say) is far away from where the people in the van live.

I don't know what she means by 'bumping into her neighbors at carpool,' though. 'Bumping into' usually means 'meeting by accident.' One does not accidentally meet other people one is carpooling with. Carpools are organized, scheduled arrangements.

Here is the full context (but it does not seem to help): Read Don't Overthink It - Anne Bogel 3 Page 13 Book Online,Don't Overthink It - Anne Bogel 3 Page 13 Free Book Online Read

And Collins Dictionary offers another definition for "carpool" but that does not seem to help either.

Roxxxannne said:

I don't know what she means by 'bumping into her neighbors at carpool,' though. 'Bumping into' usually means 'meeting by accident.' One does not accidentally meet other people one is carpooling with. Carpools are organized, scheduled arrangements.

The individual parents drop their children off at the home of the parent who is the designated driver (or at a central location). As they don't all arrive at exactly the same time, a parent may bump into zero or more parents somewhat randomly each day. On Monday, you arrive and leave by yourself. On Tuesday, you see Johnny's mom. On Wednesday, you see Suzie's dad and Brenda's dad.

That makes complete sense now!