Google launched a beta version of a new biking directions feature for Google Maps yesterday in 150 U.S. cities. It’s accessible from maps.google.com, where the drop-down menu for transportation options (which appears once you put in a starting and ending address) now features “Bicycling” along with “By Car,” “By Public Transit,” and “Walking.” If you go to maps.google.com/biking, you can also watch a short video about the new feature that explains the color coding system for streets—dark green for dedicated bike paths, light green for bike lanes, dashed light green lines for recommended routes without bike lanes—and notes that the system will route cyclists around steep hills (maybe not the most useful feature in Chicago, but in San Francisco it sure would be).