Its basically about the possibility to make trams able to use the train track (for more reference please read this: Tram-train), I think its easily done by making a tram track to train track transition, that could be work to two direction, so the trains also will be able to use the tram track ( it looked like a little bit like thisinterwined tracksas well, for stations that can handle passenger train and tram traffic as well. I dont know what kind of variations options will be possible in the tomorrow expansion, but I think these underpasses(except the left one) it wont be a part of them, that is a shame, because they are very usefull and looks awesome 
. And for last, the speed limit. This part is the essence of all listed thing above. It about the ability to contol the train and tram tracks speed limits (same as the traffic mods are handle the roads), for example: the tram that can change to the train track, will go much faster than on tram track. I suppose "Tram Craze"would be a better name for the mod
Maintance:
Just almost the same as the road maintance option in the expansion. I imgaine this mod, as an extension menu module of the original road maintance module, so not a separated new one. Maybe a new maintance center bulding will need to function, because as far as I can see, on the road side it can only functioning if its connected to it. Maybe it is something that can be done by modding, but because I am not a programmer, I dont know for sure if its possible, or not. Anyway big thanks to anybody who will try to make this happen !!!
Some picture examples for utility trains/locomotives :
1 , 2, 3,
Well I know its a big bite for a mode, but maybe not impossible, I hope someone will try to make it happen, and I can make a Big Thanks for that one too.
I've also publicated it on reddit, if you want to discuss there:
Tram Craze Mod
Track Maintance Mod
Thanks for reading
. And for last, the speed limit. This part is the essence of all listed thing above. It about the ability to contol the train and tram tracks speed limits (same as the traffic mods are handle the roads), for example: the tram that can change to the train track, will go much faster than on tram track. I suppose "Tram Craze"would be a better name for the mod Maintance:
Just almost the same as the road maintance option in the expansion. I imgaine this mod, as an extension menu module of the original road maintance module, so not a separated new one. Maybe a new maintance center bulding will need to function, because as far as I can see, on the road side it can only functioning if its connected to it. Maybe it is something that can be done by modding, but because I am not a programmer, I dont know for sure if its possible, or not. Anyway big thanks to anybody who will try to make this happen !!!
Some picture examples for utility trains/locomotives
:1 , 2, 3,
Well I know its a big bite for a mode, but maybe not impossible, I hope someone will try to make it happen, and I can make a Big Thanks for that one too.
I've also publicated it on reddit, if you want to discuss there:
Tram Craze Mod
Track Maintance Mod
Thanks for reading