Building a viral application to visualize train routes

This post details how Chronotrains, an interactive map application, leverages Vercel's Edge Network and Next.js API Routes with caching to handle viral traffic (over a million visits) and maintain seamless performance. It highlights the use of API Routes deployed as Vercel Functions for caching 'isochrone' results, PostgreSQL for storing pre-computed journey data, and Incremental Static Regeneration (ISR) to reduce database load and scale during high traffic. The application's architecture is presented as a case study for easy full-stack deployment and scaling on Vercel.