There have been programs such as graffiti removal, in which Chinatown community members and the local police work together to improve the safety and aesthetics of Chinatowns, and, as police forces diversify, many have made more successful outreach to Chinatowns than in the past. As a case study, Chinatown in Los Angeles has improved notably in these respects although there has been political wrangling with the Chinatown leaders and city of Los Angeles. However, several revitalization plans have failed to take off due in the past to low funding. Vancouver's Chinatown has attempted to counter parking problems by erecting a large parking structure, but drug problems and perceived police ineffectiveness to clamp down on property crime in Chinatown have hampered efforts.