There's a track construction tool mod I used a lot in Transport Fever 2, Wye Switch Patterns. All I really need is a track tool that give me an adjustable Y split. It need to be adjustable in length and in width at the open end. For me it just need to translate from a single track and smoothly into two parallel tracks, something that's doable without, but tricky to get right.
Are there anyone here than can make a tool similar to Wye Switch Patterns, or just the Y split track tool I need?