JCDecaux's acquisition of Clear Channel Spain has raised concerns about competition in the outdoor advertising market, particularly in urban furniture advertising. The CNMC has initiated a Phase 2 review to further investigate the potential impact on competition, considering the high barriers to entry in the outdoor advertising sector and the limited ability of competitors to exert pressure. The final decision could authorize the merger, impose conditions, or prohibit it, affecting the competition for public advertising contracts in outdoor spaces and public transportation.