The San Francisco Municipal Railway, more commonly known as Muni, is gearing up to release a revised Muni map in 2015. 

The primary goal of the new map is to present more information with less content.The most prominent change on the Muni map will be to display transit frequency. The new map will display the frequency with which routes are run with line thickness and color; in essence, a thicker line translates to a more frequently run route. Other design features include new symbols and changes in text direction, which will decrease visual clutter while still presenting information transit users and pedestrians want to know such as street names, locations of stairways, and locations of public facilities (i.e., libraries and hospitals). Additionally, new line designations will create a cleaner visual differentiation between rapid, nonstop, and limited routes. 

If you are interested in seeing the new map in person, head down to the SPUR Urban Center and check out their exhibit on Urban Cartography. The exhibit will be open through February 2015.

Or, you can view a high-resolution version of the new map (11 MB) available online.