The Carolina Vegetation Survey Documents Species Diversity at Multiple Scales (Robert Peet Lab)
All Chapel Hill buses are free. They have campus routes, so you may wish to use them as your primary mode of transportation. For schedules consult http://www.ci.chapel-hill.nc.us/transit/.
There is an express bus to and from Duke University available to students and faculty, which costs $2.50 each way as of 2013. The schedule is found on the website http://www.robertsonscholars.org/bus.
There are many bicycle racks to which you can attach (and lock) bicycles on campus and in town. You are encouraged to register your bicycle at the UNC Department of Public Safety. They have a brochure you may wish to get concerning bicycle use. If you don’t drive to campus, consider registering with the Commuter Alternative Program (CAP).