Leah Harnack in "Art in Transit" explains how well-designed and positioned public art displays have a "profound impact on transit patrons and the community at large." Studies have shown that the simple display of a statue or painting has the ability to improve the safety and overall experience of passengers. Art attracts patrons and visitors to a city and further promotes the sustainable ideals of public transit. To read more on the subject check out v.36:no.3 of MassTransit [2]
Links:
[1] http://www.library.northwestern.edu/libraries-collections/evanston-campus/transportation-library
[2] http://nucat.library.northwestern.edu/cgi-bin/Pwebrecon.cgi?BBID=4723233