Bay Area Freeway Retaining (And Sound) Wall Art

Denis Cuff of the Contra Costa Times provides a photo gallery and discussion of the freeway retaining wall art found throughout the Bay Area, such as this snippet:

. . . Architectural medallions adorning the portals to the Caldecott Tunnel fourth bore cost about $70,000 of the $417 million project cost, according to Caltrans. The oak leaves on I-680 in Danville cost $60,000 out of a budget of $32 million for new auxiliary lanes. . . . .