This is Free Will. It is autonomous actions performed by a Sim. It can be turned on or off in the options by clicking the '...' as though you were about to save and going to 'options', then to the plumbob tab and changing free will.
Free will is liked by some players because it allows them to concentrate on one sim or a small group and the rest of the household will get on with their lives, although they won't do much and sometimes can do odd things that get in the way. However some players don't like it because the sims do stupid things and go places they aren't meant to or get into situations or relationships without the player wanting them to.
Toplight
You're going to have to be more specific. Taxis are still used and have been used for many years. If you mean when were they FIRST used then you have to specify when.
Buses, Metros, Trains (going out of the city) and Taxis.
Yes we have taxis.
Not taxis, but axis.
yes, There are taxis in Rome
They are called taxis.
sorry not all taxis have it.
i taxis sono qui
Yes, Europe does use taxis.
The Bridewell Taxis was created in 1987.
Yes. Generally, there are taxis in major cities in Egypt. Taxis have different colors in different cities. In Cairo, for example, taxis are white and black while in Alexandria they are yellow and black.