u/TheGuiltlessGrandeur

Hi everyone,

I made Network Planner, a planning and analytics suite for Subway Builder. It reads the game's real demand grid and live line metrics and turns them into decisions: where to expand, which lines need trains, when, and where crowding comes from.

It adds a three-tab panel, and the analysis works with zero setup.

Planning (where to grow)

• Walk-catchment coverage of residents and jobs
• Mode-shift potential: drivers whose home and work are both reachable, so you can win them on today's network
• A ranked "build here next" list of the biggest unserved markets (click a row to fly there)
• Per-route and per-station riders vs drivers, with success-rate dots on the map

Efficiency (how well it runs)

• Per-line load factor with plain-English advice (add peak trains, trim off-peak, over-served, rising or easing vs yesterday)
• Load-by-hour charts with day-over-day comparison and the game's High/Med/Low service brackets
• Expand any line to see the stops driving its crowding
• Remembers your data per save, so it is never blank on reload

It also has optional key-free satellite basemaps (Esri, Google, Hybrid, OSM). The core analysis needs no proxy or key; satellite needs a tiny local tile server (one-time setup, see the README).

Free and open source: https://github.com/davidkarpik/network-planner

Download the latest release, drop it into your mods folder, and activate it. Feedback and ideas are very welcome. 😉

*Update: Railyard or similar third-party platforms are not necessary to run the mod.

*Edit: Could a mod please edit the post title to Planner, instead of Planer 🥶