Picking Up and Dropping Off Passengers

I've been working on a passenger line in my layout and have what may be a basic question...I know about the load and unload commands, but when I use them in sequence at a passenger station, the doors open, unload, close, reopen, load, close. While I guess that makes sense since it it two separate actions/commands, is there a command that will allow a random number of passengers to get off and on, as in real life?

Thanks!

From what I have observed the load command on its own when dealing with passengers results in passengers unloading and loading in that order. There is no need for both commands. The number that get off is in proportion to the number of passengers already on the train (there is a thread about this but I am not sure where). If you need all the passengers to get off there is the terminate passenger command.

Thank you!