granite book-shaped block. One of the newest additions to the collection is Tim Hawkinson's giant teddy bear made of six boulders located in between the newly constructed Calit2 buildings. Another notable campus sight was the graffiti staircase of Mandeville Hall, a series of corridors that had been tagged with graffiti by generations of students over decades of use; this was recently replaced with the Graffiti Art Park. Students in the university's visual arts department also create temporary public art installations as part of their coursework. The university is sponsoring a $56,000 performance art project to develop a sense of community at the sprawling campus. Shepard Fairey, most notable for his Barack Obama "Hope" poster, painted a mural at the Ché Café, one of UC San Diego's most famous buildings and collectives, on an outside wall facing Scholars Drive, that features the likenesses of Martin Luther King Jr. and other political figures. Underground street artist, Swampy, created a large piece inside the Ché Café, visible through the courtyard depicting his signature mammoth skeleton. Local San Diego artist Mario Torero, in collaboration with university art students, painted a mural at the Café in commemoration of Angela Davis and Rigoberta Menchú, along with other notable political figures. The Ché Café remains a hub for underground and politically progressive artists. Torero was invited back to the university in 2009 to create a mural called "Chicano Legacy" based on content suggested by Chicano students. The mural is a $10,000 digital image on a canvas mounted on the exterior of Peterson Hall, which includes representations of César Chávez and Dolores Huerta as well as the kiosk structure at Chicano Park. In 2016 a mural entitled "Enduring Spell" was completed by El Mac in the Argo courtyard, Transportation UC San Diego maintains about 17,000 parking spaces and offers a number of alternative transportation options. The university runs a shuttle system, which is provided free for students, faculty, and staff, that services the main campus, UC San Diego Medical Center, university affiliated research centers, nearby apartment complexes and shopping centers in University City, and the Sorrento Valley train station. As part of a greater initiative to reduce the university's impact on the environment, a portion of the shuttle fleet has been refitted to exclusively use biodiesel fuel derived from vegetable oil. UC San Diego also reserves parking spaces for carpools, maintains a fleet of on-campus Zipcars, and provides