Someone Mapped All 3,700+ of SF’s Crosswalks
UC Berkeley PhD candidate Marcel Moran took the time to map every crosswalk in San Francisco.
Moran used satellite imagery to investigate all 6,400 intersections in The City. He then mapped all the intersections to indicate which have crosswalks and which do not. His map reveals the city’s geographic patterns in crosswalk provision and quality.
He explains on Twitter that his method was time-consuming, but it improved hinis accuracy since he could examine which intersctions had complete crosswalks and whether adajecnet blocks were connected.
He also dug into four specific neighborhoods and noted that “Pac Heights had the highest crosswalk coverage, and the highest percentage of ‘complete’ crosswalks. Bayview was last in both categories.”
You can read his full research paper, “Where the Crosswalk Ends:Mapping Crosswalk Coverage via Satellite Imagery in San Francisco” for free for more details and analysis.
The method was time-consuming, but simple. I manually reviewed satellite imagery at every single intersection citywide. I did this in order to maximize accuracy, and dig deeper than a binary crosswalk vs. no-crosswalk score (2/7) pic.twitter.com/M91jbip8TH
— Marcel Moran (@marcelemoran) February 9, 2022