also I recommend you to add more trains including steam locomotives like the one below " the flying Scotsman" also add actual npc's walking around on the platform instead of plastered or glued on. you should also add train conductor npc's flagmen at the stations who signal the driver when to go, an inside 3d view of the drivers cabin with working buttons and levers. also add a 3d perspective of the inside of the train carriages and a conductor who yells " all aboard" to the passengers. also add 3d view of people walking about on the platform and going in/ outside of the carriages. add actual visible see- through windows where you can see the passengers in your carriages at night/ day and add engineers for the deiseal/ steam locomotives. one more thing to add is the city map with visible roads, highways and skyscrapers in the distance.
we've talked about this before but these are not great ideas. They are purely aesthetic and barely increase the quality of the game. Its a better investment to spend time making new maps, trains and missions than to just have walking npcs. its a waste of time and most importantly, frames. Low end computers will struggle the more things you add, so you may as well add helpful things