Supply Question: How many kilometers of roads in [a given polygon] are X? Example: “How many kilometers of roads within a city are high speed?”
Concept: To answer the above question, we are building a tool that works with OSM which selects within a polygon the road network that matches a given field, then aggregates the length of that road network.
Benefits: Understanding road network length by type within a given area gives us a metric to understand street ‘supply.’ We can begin to quantify & compare how much of a region is made up of different types of roads. Some roads have good associations for sustainable mobility (transit lanes)– other road types have poor associations for sustainable mobility (highways). By being able to classify the amount of different types of roads in a variety of areas we can compare road supply type in different cities and neighborhoods. Then, by pairing it with other social metrics we may identify associations that impact supply.