Nielsen Expands Outdoor Ad Market Coverage, Move Presages A Boom »

The leading competitive ad Monitoring services are getting, well, competitive again. In the span of 24-hours, both Nielsen Media Research and Taylor Nelson Sofres announced upgrades to the media they measure in their U.S. ad tracking services. In a potential boon to the outdoor media industry, Nielsen's Monitor-Plus unit Tuesday announced it had significantly increased the number of outdoor media companies it tracks in its out-of-home measurement reports, bringing the total number of markets measured to more than 150.