Coverage analysis
What 15 minutes cycling covers in Detroit.
Detroit River creates a hard international southern wall, pushing all suburban isochrone growth north along Woodward, I-75, and I-94 spokes into Oakland and Macomb counties.
At 15 minutes by bike, the Detroit cycling isochrone captures the neighbourhood cycling zone — the area where cyclists make routine, repeat trips without deliberate trip planning. Unlike a flat radius circle, the real cycling-network polygon follows Detroit's actual bike lanes, greenways, and low-traffic streets — reaching further along protected corridors while contracting where motorways, rail yards, and rivers lack cycle crossings.
Coverage area at 15 minutes cycling: ≈ 8–15 km². Common applications for this zone include urban fitness and specialty grocery site selection, food-hall trade area analysis, cycling infrastructure planning.
The city-level population of 639,000 and a median household income of $34,000 give a sense of Detroit's economic density, but the figure that matters for cycling catchment analysis is the population inside the polygon — not the city as a whole. That number shifts significantly depending on whether your origin is in a dense urban core or a lower-density suburban corridor. Use the tool above to set your actual candidate location, then generate the isochrone to see the real cycling catchment.