Coverage analysis
What 30 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 30 minutes by bike, the Detroit cycling isochrone captures the city-wide cycling catchment — a zone where cycling trips are purposeful — riders cross neighbourhood boundaries for specific destinations. 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 30 minutes cycling: ≈ 30–60 km². Common applications for this zone include bike-share service area design, brewery and urban recreation catchment analysis, bike shop trade area 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.