In Ogden, Utah, a partnership between the city and local art college is converting a blighted underpass which has been a frequent target for graffiti attack into an extensive mural and public artwork.
This effort is making the underpass "feel" safer for pedestrians and joggers and eliminates a source of blight and frustration. The murals may not eliminate the graffiti, but should significantly decrease the frequency. Excellent anti-graffiti coatings can be applied to help protect the mural and allow easy graffiti removal when a tagger decides to tag over the mural.
From Clean City Innovation Graffiti Watch