Crosswalks
San Francisco has roughly 6,400 intersections. My research question was which of these intersections have marked crosswalks, and which do not. After determining the best-available dataset from the city did not cover all intersections, I pursued this question via manual analysis of satellite imagery. This method, though time consuming, is highly accurate, and allows for the generation of 'crosswalk coverage' or the percent of intersections in a given geographic unit with marked crosswalks. This project culiminated in a publication in the peer-reviewed journal Environment and Planning B: Urban Analytics and City Science.
The data from this project are freely available for download. I only ask that if you use this data in your research, advocacy, or writing, to please provide attribution to this project.
Suggested Citation:
Moran, Marcel E. 2022. “Where the Crosswalk Ends: Mapping Crosswalk Coverage via Satellite Imagery in San Francisco.” Environment and Planning B: Urban Analytics and City Science 49 (8): 2250–66. https://doi.org/10.1177/23998083221081530.