UT Austin grad student. My classes are on campus, buy my office is up at a research campus. MWF I ride 7.5 miles to the research campus and take a shuttle down for class. TTh I have been riding 3.2 miles to a park and ride and boarding an express bus whose first stop is the UT campus. Just this last Thursday I biked the 15 mile trip from home to campus and took the express bus back to the park and ride on my way home. From here on out I'll do that once a week, gradually building to twice a week, and if I get to feeling really strong I'll do the uphill version and bike the 15 mile legs back home.
UTA staff and students ride all the busses for free, so it has been pretty easy to get around without a car.