Rusty Rails

Unused railway track no longer stays shiny forever. Rusty Rails remembers when a train last ran over each piece of track, and track that sits unused slowly goes to ruin: - Weedy (after 1 year without a train): light rust on the rails, grass patches in the ballast, moss on the sleepers. Speed limit 80%. - Overgrown (after 2 years): heavier rust, ballast mostly grass, weeds and ferns between the rails and along the edges. Speed limit 55%. - Derelict (after 4 years): rails rusted through, the bed grassed over, with tall grass, berry and thorn bushes growing along the line. Speed limit 30%. Decayed track costs less to lay and much less to maintain than normal track (upkeep is about 60%, 35% and 15% of normal). The next train to use the line brings it back into service: once it has passed, the track is restored to clean, full-speed track. The times and speed limits above are the defaults: all six can be changed in the mod settings when starting a new game or loading a save. The settings also let you switch track scanning off if the game runs slowly. The weedy, overgrown and derelict track types for the map's climate are listed in their own "Overgrown Tracks" tab of the track menu, so you can lay them by hand too. Each climate has its own look: lush grass, ferns and bushes in temperate maps; dry yellow grass, saltbush, scrub and the odd cactus with sun-bleached sleepers in dry maps; dense ferns, taro and young banana plants with mossy sleepers in tropical maps; and moss, alpine flowers and small conifer saplings with lichen-covered sleepers in subarctic maps. Works on the base-game simple, standard and high-speed tracks, with or without overhead wires. Track decays right up to level crossings (the crossings themselves and their barriers are kept, and nothing grows through the road). Bridges and tunnels are left alone. Stations and other constructions are left alone, and track from other mods is not affected. Changes are spread out over time so there are no hitches. Uninstalling Overgrown track uses track types that only exist while this mod is active, so it must be turned back into normal track before the mod is removed: 1. Pause the game, so no more track changes are made. 2. Use the track upgrade tool to replace every weedy, overgrown or derelict section with normal track of the same kind (simple, standard or high-speed, with or without overhead wires). 3. Save the game. 4. Disable Rusty Rails for that save and load it again. Removing the mod while overgrown track is still in the save will break that track. Inspired by the Rusty Rails mod for OpenTTD.