Refreshing the Travel-Time Map Behind Lyft’s Marketplace: Rebuilding Neighborhood Reachability…

Refreshing the Travel-Time Map Behind Lyft’s Marketplace: Rebuilding Neighborhood Reachability Signals

Every time Lyft calculates pricing to balance a market, nudges a driver toward an under-served pocket of a city, or paints a heatmap of where demand is building, there is a quiet lookup table doing work in the background. It answers a deceptively simple question: how long does it take to get from here to there?, for millions of pairs of places, across hundreds of regions.

That lookup table is the Neighborhood Reachability Signal, and for years large parts of it were frozen in a snapshot of the world from 2018–2019. This is the story of how we rebuilt it, why a refresh substantial enough to be worth adopting was what finally moved Pricing to switch, the cleanly positive results that came out of that switch, and where we’re taking it next, from one static file per region to time-aware travel times that change with the rhythm of the day.