steampowered currently has 15 track pieces with 9 items, straight, crossing, diagonal straight, 45 degree curve (left & right), 90 degree curve (left & right), incline (22.5 degree gradient) and "mountain incline" (45 degree gradient), the mountain incline has a gear thread on it and only specific mountain train locomotives can get up it as they have the gearing for the tracks, you can press right click to cycle through all the track pieces,
The mod is open source! you can check out the source here https://git.mallard.gdn/halbear/Steampowered
by HalbeargameZ