A struggling economy and low ridership have Dallas Area Rapid Transit creating new sources of revenue. This week, DART's Board of Directors reversed a longtime advertising policy to allow beer and wine ads on its buses and trains. DART Spokesperson Mark Ball said, "It wasn't even something that was discussed in the past. When it was suggested that we could make anywhere from 200 to 400 thousand dollars a year, the board decided that was something we needed to consider."