Are passenger and growth parameters stored with the map (sve file) or not?
city and passenger parameter (https://simutrans-germany.com/wiki/wiki/de_simuconf_tab_passenger?page_ref_id=1758#growthfactor__)
This question also arises with many other parameters.
parameter list (https://simutrans-germany.com/wiki/wiki/de_parameter_list)
As these affects the game state, these are saved with a network game, even the cityrules.
For non-network games, the cityrules and cluster_factor, renovation_percentage, min_building_density should be taken from the tab file of the game. If there was rpeviously played a network game, then that settings mail prevail.