OSM Temporary Road Closures

A full-stack, AGPL-licensed platform built during Google Summer of Code 2025 for the OpenStreetMap Foundation. Community users submit closures via a Next.js/Leaflet interface, while a FastAPI service backed by PostgreSQL + PostGIS validates, stores, and serves geospatial data. Locations are encoded with OpenLR to remain map-provider-agnostic, and a Valhalla integration powers closure-aware routing across auto, bicycle, and pedestrian modes.