Maeve Reston writes, "The 92 digital signs began popping up several years ago after Los Angeles struck a deal with two billboard companies, Clear Channel Outdoor and CBS Outdoor, which had sued the city over its earlier sign regulations. The 2006 agreement, negotiated by former City Atty. Rocky Delgadillo, allowed Clear Channel Outdoor and CBS Outdoor to modernize up to 840 billboards in exchange for removing 98 -- 3% of their inventory. The City Council approved the deal, but a number of council members have said they did not grasp the effect it would have on some of their constituents."