There are 55 miles of bike paths in Davis. They lead to overpasses and tunnels. Be careful, though—although many are great, they aren't all in good repair.
When classes change at UC Davis (10 minutes before the hour in the morning, and 10 minutes after the hour in the afternoon) there is a great rush of students on bicycles. In the early fall most of the freshmen on bikes are learning how to navigate the traffic circles.
For more information about biking in Davis, take a look at:
More info on the South Davis Bike Path is available.
If you want "paths"/rides heading out of Davis, check out Bicycling. See also Closed Bike Paths for a listing of current closures.
Bike paths do not have the same cross section that road bases do and sometimes weather more quickly