With the opening of Penn Park, the University of Pennsylvania has expanded its “Penn Transit” shuttle service to operate during the daytimes (previously, the buses only ran in the evenings). The buses will run on a “Campus Loop” serving all of the current stops in addition to the Levy Tennis Pavilion every 20 minutes.
For more details, check out this Press Release from the University of Pennsylvania: http://www.upenn.edu/pennnews/current/2011-09-22/latest-news/penn-transit-adds-daytime-service-campus-loop-bus