Vehicle rebalance

Changes compared to the base game Running costs - Running costs now fall by decade of introduction. From the 1930s, ground vehicles, ships and wagons drop about 3% per decade (wagons about 4%). The newest vehicles (2030s) end up roughly 28% cheaper for trucks, buses, trams, trains and ships, and about 36% cheaper for wagons. - Aircraft stay unchanged until 1990 and then fall by 3% per decade. - Helicopters cost 50% more, regardless of decade – they felt too much like money machines before. Noise and pollution - Many buses, trams, trucks and wagons received individual noise and pollution factors. Old vehicles are louder and dirtier, new ones quieter and cleaner, and electric vehicles are clearly cleaner. - Steam locomotives are twice as loud and polluting as in the base game. - Electric trains are 50% quieter and 20% cleaner. The noise and pollution scores shown in the shop are rescaled for all trains: the loudest train gets a noise score of 100 and the dirtiest a pollution score of 100, with all other trains sorted in proportionally. - The split of the noise and pollution values between idle, speed and power was shifted towards speed and power for buses, trams, trucks, trains, wagons and ships. The sum of the three parts of a vehicle stays the same; the other factors apply afterwards, so the shift also holds for vehicles with an individual factor. - Most changes were made to buses and trucks, where I tried to model a progression in which vehicles get louder and dirtier as they become more powerful, up until roughly the 1970s, when top speed in particular stops increasing. After that, drivetrain upgrades are basically optimizations in noise and pollution for similarly sized buses and trucks. - Increased importance of the vehicles speed and engine use for pollution and noise values. A vehicle standing in a station should now be cleaner and quiter. A moving vehicles stats should not be changed significantly, other than the changes mentioned before. General - I hope these changes will give the player a chance to keep up with inflation and company level as the game progresses. - Generally, there should now be more incentive to upgrade to newer vehicles, as fewer new vehicles are required to get a job done, so pollution and noise should go down after an upgrade. - 6 ships and 9 wagons stay available until the end of the game. - Ships: Canadian Trawler, Votrans Tanker, Votrans Towboat, Borealis, Wopper and Cap Arkona. - Wagons: the 80 km/h and 100 km/h variants. - This way there will be more options, especially for low-throughput routes in the late game. - The power and tractive effort of all steam, diesel and electric engines of rail vehicles are reduced by 35%. This includes multiple units. Locomotives from other mods may be affected as well. - The reasoning behind this is to give more locomotives a role with train lengths that are reasonable in the game, on routes with distances and rates a player would typically see. Before, I had the feeling that only the cheapest locomotives made sense to use.