In this locking time, l spend time to build a complex railway network in the game and found still have some problems that prevent this game getting better: No distant signal, there is stop signal only; in the same route the behind train will catch up the ahead train; some bug in the game such as house was built on road.
My solution is to just place a boatload of signals on the track!
It can be annoying when you have a faster train stuck behind a slower one when it either accelerates or brakes instead of staying at a constant speed. This ends up with it breaking fully at a set of signals and taking forever to get up to speed again.
I much preferred the mechanics of TF1 - where each town needed the same things, fuel, food, materials etc. Made for more realistic world and you could have huge distribution centres. Towns were more realistically populated. In TF2 a huge town only has a few hundred population. This was done to try and make TF2 less resource hungry, but even now, on a large TF2 map it soon reaches a point where the sim can't update all the cars etc and it stutters, even on a top end gaming rig. But I do like the graphics in TF2... If the developers could have simply applied the new graphics to TF1 and added the new roundabouts and traffic lights / one way streets etc without impacting performance they would have been on to a real winner. I've not played TF2 as much as I played TF1 when it was first released.
I wonder how much the graphics effects the overall sim count/lag issue. I have a feeling the sim count is a CPU related issue, whereas graphics will be likely all GPU (although the CPU is relied upon to a certain degree to send commands to the GPU)
There is this internal battle I can see from the original Train Fever to Transport Fever 2 of balancing realism with balanced gameplay. You see, smaller maps allow you to play for longer before running into sim count issues, but then many of the trains and vehicles cannot be used to their full potential. Aircraft are a feature that you can about make profitable on an elongated map, provided you're not already providing service there. A standard sized 1:1 map probably won't allow for much 186mph train running, especially the slow accelerating Avalia Liberty model!
Then lots of the train models provided aren't profitable unless running long distance Express routes due to the cost balancing, and in late game it becomes difficult to run little shuttle routes at all!
That said, no game even attempts it like the TF series of games, and I can spend hundreds of hours fiddling with layouts and throwing in my favourite mods of more real life trains!