Unclog LA

Launched Private

A browser simulator for turning car-centric LA into a transit city. It renders lines and 3D vehicle meshes over a real map with deck.gl and MapLibre, backed by Neon Postgres as the data layer. Built with Vite and Zustand.

Unclog LA in play. A dark map of Los Angeles carries colour-coded Metro lines; a left panel holds build-and-policy controls plus the line list, a right panel reports a 5.2% transit mode share, 342,407 daily riders and a $1.28B annual balance, and a 2025-to-2050 timeline with an 'Advance Year' button runs along the bottom.

TypeScriptdeck.glMapLibre GLNeonZustandVite

How it was solved

Problem

A transit game detached from real data quickly becomes a game about arbitrary tuning rules rather than network decisions.

Decision

I built a deterministic simulation over GTFS and LODES data for 313 zones, with gravity demand, logit mode choice, congestion feedback, and server-side rescoring of shared plans.

Evidence

The 2025 baseline was calibrated to roughly 5% transit mode share and about 328k daily rail boardings; replay validation exposed and closed exploits around speed, construction timing, and last-turn frequency changes.

Result

The result is a browser simulation where route, frequency, and construction-timing choices are grounded in real city data and verified on the server.

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