From SPUR:

Eight years ago, transit planner Jay Primus and mapmaker David Wiggins began redesigning San Francisco’s transit map. Among the big changes they envisioned was the visual communication one of the most important aspects of service for users: transit frequency. With the map complete and Muni introducing it into bus shelters this spring, the mapmakers will lead a discussion of their process and product.

+ Jay Primus / transit planner
+ David Wiggins / cartographer
+ Julie Kirschbaum / San Francisco Municipal Transportation Agency