In imitation of Yann Le Tilly's map of where people in Paris tweet about RER.
Data from Twitter, May 15, 2011-June 18, 2012.
Base map data © OpenStreetMap contributors, CC-BY-SA
Simon Oud, shanan, Ross, ke6cat, and 4 other people added this photo to their favorites.

Steven Vance 11 months ago | reply
How often do people talk about being stuck in traffic? And where are they? Everywhere? Or is it concentrated on just highways?
How many tweets were not within 100 meters of a BART line or station?
Eric Fischer 11 months ago | reply
There are almost twice as many BART references (6891) as traffic references (3687) in the same area. Most of them are on the freeways, but some on regular streets, especially downtown San Francisco.
I can't answer the question about proximity to BART lines as easily, but I should be able to calculate it later.
jelway_1997 10 months ago | reply
More importantly, Steven, can tweeting about traffic be used against someone in court?
Steven Vance 10 months ago | reply