For gta3, Vice and SA; Memory on the ps2 was tight. We had to limit the number of used vehicle models to 8.

My code would occasionally pick a car model to be phased out. Once there were none left on the map, this model would be removed and a new model could be loaded.

The code would pick a model that was appropriate for the area (sports cars in business district, old cars in run-down areas etc).

Most of the time this worked fine.

A few things could throw a spanner in the works:

#picotron 0.1.1d will be up tomorrow; here's a changelog:
https://pastebin.com/raw/M4ZugWM1