Video billboards coming this way

By Joseph A. Slobodzian
Inquirer Staff Writer

One of ClearChannel’s digital billboards in the Cleveland area. The outdoor-advertising company said an engineer it hired studied traffic for 18 months before and after the billboards’ installation and found no link to highway accidents.

Praised by police, criticized by scenic conservationists and driver-safety groups, and hugely profitable for their owners, digital billboards are about to enter the Philadelphia area.