With a Chicago plaintiff’s lawyer on the case, an Ohio judge certified a class of ticketed highway motorists in a suit against a small city and its speed-enforcement system.Trumbull County Judge Andrew D. Logan greenlighted the plaintiffs’ motion for certification on behalf of more than 7,700 drivers who were issued $100 fines for speeding in a purported construction zone on a stretch of Interstate 80 in Girard, just northeast of Youngstown. The plaintiffs allege the speed limit should have been changed when …